Introduction: Physics Vs Chemistry (Amazing Science Experiments)

Science teachers are faced with the task of not only explaining processes, laws and so on, but also finding ways to arouse students' interest in subjects that are sometimes not easy to learn and understand. Therefore, I think that it is very important not only to revive teaching, using interesting experiments where it’s possible, but also to involve students in their implementation. Nothing will be remembered so vividly and will cause such emotions as a self-made experience (of course, under the supervision of a teacher). A demonstration of experiments by students will help them not only to feel involved in science, but also to practice public demonstration skills.

I suggest you conduct with your students a series of interesting, not dangerous, and non-complex experiments in chemistry and physics. In my opinion, it is with these subjects that many students have problems. Of course, it is better to choose experiments with already studied processes and reactions, since the students will be able to consolidate the material studied, but, it seems to me, this project can be carried out at earlier age. After all, your goal is to arouse interest in these subjects, namely in young students, such experiments will find a greater emotional response.

I also suggest that you do not just conduct experiments in chemistry and physics but make something in the form of a Chemistry vs Physics competition. No, there will be no winners or losers. Simply, these two disciplines will fight for the interest of your students through such experiments. You can hold this so-called Chemistry vs Physics battle first in the classroom and then arrange it to be shown to a large audience (you can also invite parents, as I am sure they will enjoy seeing their children as experimenters).

This project is intended for 7th-9th graders.

The Project Objectives: to arouse in students the interest in Chemistry and Physics.


reagents and materials necessary for the selected experiments (see step 1),

protective glasses,

protective gloves,

containers for packaging reagents,


paper (printing paper, kraft paper),


PVA glue,







Step 1: Choosing Experiments and Preparation of Necessary Reagents / Materials

Choose for your students experiments. The experiments with using fire or medium danger better demonstrate yourself.

Collect the necessary materials and reagents.

The experiments with using fire or medium danger:

Atmospheric Pressure Experiments

Burning candle/paper affects atmospheric pressure.

1. Atmospheric Pressure and Water

You need: a candle, a plate, water, a glass, matches / lighter.

2. Atmospheric Pressure and Balloon

You need: a balloon, matches, a piece of paper, a flask/jar, water.

3. Candle Seesaw

A candle balanced between two supports oscillate like a seesaw, when lit on both ends.

You need: a long candle or two identical birthday candles and tape, a knife, matches, a needle, a large piece of aluminum foil (to collect the wax), two cups or glasses.

4. Colored Fire

While burning ions of metals and non-metals turn flame different colors.

You need reagents:

for to get yellow color – sodium chloride (NaCl – salt for cooking), sodium bicarbonate (NaHCO3 - baking soda), sodium carbonate (Na2CO3 - washing soda);

for green color – boric acid (H3BO3), barium chloride (BaCl2), copper sulfate (CuSO4);

for yellow-green color – barium nitrate (Ba(NO3)2), molybdenum;

for red color - calcium chloride (CaCl2);

for purple color - potassium chloride (KCl), potassium iodide (KI), potassium carbonate (K2CO3).

Colored Fire with Paraffin

You need: a spirit lamp or a paraffin candle, matches, a wooden stick, a glass of water.

Colored Fire with Ethyl Alcohol

You need: refractory cups (for labs) or aluminium cups (for example the kind used as candle holders), ethyl alcohol (96%), matches/lighter.

Colored Fire with Dry Fuel and Wire

You need: copper wire, hydrochloric acid solution 10%, refractory cups (for labs), dry fuel tablets, nichrome wire, matches/lighter.

5. Volcano Sсheele

As a result of the reaction between glycerin and potassium permanganate a spectacular ignition with a violet flash occurs. Combustion is accompanied by a spread of hot particles of reaction products, which is very similar to a volcanic eruption (ignites spontaneously). This reaction was first time obtained by the Swedish chemist Carl Wilhelm Scheele.

You need: anhydrous glycerin (C3H5(OH)3), potassium permanganate (KMnO4), mortar and pestle, a refractory cup or ceramic tile, a pipette.

6. Chemical Snake

After the ignition of a combustible substance, a number of chemical transformations take place, as a result, a carbon snake appears.

You need: calcium gluconate (C12H22CaO14) or powdered sugar, sodium bicarbonate NaHCO3 (baking soda), sand and ethanol or solid fuel, foil, refractory stand.

7. Foil Destruction

Aluminum foil is destroyed quite spectacularly during chemical reactions.

You need: copper sulfate (CuSO4), sodium chloride (NaCl - salt for cooking), aluminum foil, water, a beaker, a pipette.

8. Magic Movement

Warm air rises up from a burning candle and makes a paper spiral move.

You need: a candle, paper, long stick or pencil, cardboard, scissors, hot glue, matches/lighter.

The experiments without using fire:

9. Water Rise

The water soaks up the paper/rope and "climb" onto it.

You need: paper towel/napkin or filter paper, a piece of white twine or laces, water, glasses/cups, drawing markers (not permanent), colors, scissors, binder clips or clothespins.

10. Dancing Fluids

From fluids with different densities you can create a real show.

You need: 2 glasses, water, vegetable oil, dye, salt, a spoon, a pipette.

11. Ocean in the Bottle

You need: a bottle with cork, water, vegetable oil, a float or cork and wire, blue dye.

12. Non-Newtonian Fluid

A fluid, that does not follow Newton's law of viscosity, is made and the properties of this fluid are investigated.

You need: starch 200 g, water 1 glass, a bowl, dye, a spoon, a connected speaker, a film.

13. Fluids and Through the Looking Glass

The glass will disappear; the inscription will be mirrored. Fluids can do all this!

Fluids and Glass

You need: 3 beakers/glasses, glass sticks, water, vegetable oil.

Water and Writing

You need: a piece of paper, a pen/marker, a glass, water.

14. Strong Water

Water does not pour out of an inverted glass.

Water and Paper

You need: a glass, water, a piece of paper.

Water and Gauze

You need:a glass, water, gauze, a rubber band, toothpicks.

15. Electroscope

An electroscope is made and the presence of a static electric charge is demonstrated.

You need: a jar with the lid (make a small hole in the center of the lid), a wire, aluminum foil, scissors, hot glue, balloon (different things), an object made out of wool (such as a sweater, scarf, blanket or ball of yarn).

16. Balloon Experiments

Chemical Inflating of Balloon

A balloon is inflated with carbon dioxide released during the chemical reaction.

You need: soda, a glass, water, a bottle, lemon juice, vinegar, a balloon, tape.

Magnetic Balloon

A balloon rubbed on a woolly material becomes negatively charged and attracts positively charged objects.

You need: a balloon, a paper, water, an aluminum can and other materials/objects, scissors, a thread, an object made out of wool (such as a sweater, scarf, blanket or ball of yarn).

Burst Balloon with Citrus Fruit

The balloon bursts due to the dissolution of its latex by limonene contained in citrus fruits.

You need: a balloon, a thread, a knife, a fresh orange or lemon.

17. Color Change Solution

As a result of the reaction, glycerol changes violet KMnO4 solution to green and then to orange.

You need: calcium hydroxide (Ca(OH)2), potassium permanganate (KMnO4), sodium sulfate (Na2SO4), 10% aqueous glycerol (C3H8O3), a beaker, a pipette.

18. Colored Liquid

pH indicator, added to different solutions, changes color in accordance with the pH of solutions.

You need: pH indicator Thymol blue, sodium hydrogen sulfate (NaHSO4), citric acid, sodium carbonate (Na2CO3 - washing soda), sodium hydrogen carbonate (NaHCO3 - baking soda), water, 6 glasses, a spoon.

19. Chemical Ink Eraser

The ballpoint pen drawing fade away due to the chemical reactions.

You need: a ballpoint pen, a piece of paper, potassium permanganate (KMnO₄), vinegar, hydrogen peroxide (H2O2), water, a test tube, cotton swabs, napkins, an iron or press.

20. Lemon Volcano

The chemical reaction between citric acid and soda looks like the volcanic eruption.

You need: a lemon, a knife, a spoon, soda, liquid soap, dye.

21. Chemical Jellyfishes

The formation of insoluble silicate metals that resemble jellyfish.

You need: sodium silicate (liquid glass) solution, solution of metal compounds (called metal salts) CuSO4, MnSO4, FeCL3, FeSO4, a Petri dish or a glass.

22. Dry Paper in Water

The piece of paper stays dry in a glass dip in water.

You need: a piece of paper, a glass, a pen, a bowl of water.

Step 2: Making the Step-by-Step Experiment Instructions

Print step-by-step instructions for selected experiments (for each experiment separately). Print also General safety rules and General first aid information (on the back of the instruction sheet).

1. Atmospheric Pressure and Water

1. Put a candle on a plate.

2. Pour a little water into the plate (water should not cover the candle).

3. Light the candle.

4. Cover the candle with a glass.

5. Watch what is happening and record your observations.

2. Atmospheric Pressure and Balloon

1. Fill the balloon with water so that it is just too large to fit down inside the flask/jar and rests on top.

2. Light a piece of paper on fire and drop it into the jar. Place the balloon on top.

3. Watch what is happening and record your observations.

4. Once the fire dies and the jar cools, try to pull the balloon out.

3. Candle Seesaw

1. If you use a long candle, then carve down the candle end so that the wick will be visible on both sides of the candle. If you use two identical birthday candles, then tape them together at their ends so both wicks are facing opposite directions.

2. Find the center balance point of the candle: hold it between two fingers and find the point on the candle where it levels out. Mark this point with your fingernail.

3. Using matches heat up the needle end and press it through the candle at the marked point. The needle must be sticking out on both sides of the candle.

4. Put the aluminum foil on your work area to protect it from wax spills.

5. Set the glasses next to each other so that the distance between them will be no more than the length of your needle.

6. Light the wick of the heavier end of the candle and let it burn until it begins to level out. Once it levels, light the other end.

7. Watch what is happening and record your observations.

8. Make sure to blow out both candles before they burn completely.

4. Colored Fire

Put on protective gloves and eyewear.

Conduct the experiment in a laboratory fume-hood.

Keep a bowl of water nearby during the experiment.

Keep hair and flammable objects away from flame.

Colored Fire with Paraffin

1. Melt some paraffin: light a candle and wait about 3 minutes.

2. Dip a match or a wooden stick into the paraffin, then in salt for 30 seconds (the salt crystals will stick to the paraffin).

3. Add another layer of paraffin to help the crystals stick better.

4. Use water to cool the outer layer: dip briefly into water.

5. Bring the end of the stick with salt the burning candle.

6. Watch what is happening and record your observations.

Colored Fire with Ethyl Alcohol

1. Sprinkle 10 g of salts into the refractory or aluminum cups.

2. Add 5-10 mg of 96% ethyl alcohol and light it.

3. Watch what is happening and record your observations.

Colored Fire with Dry Fuel and Wire

1. Place one tablet of dry fuel in the refractory cup and set it on fire.

2. Fold a loop at the end of the wire.

3. Add 2-3 drops of hydrochloric acid solution in a cup and dissolve several crystals of copper sulfate in it. Dip the end of the wire into this solution and place it into the fire. Warm the copper wire in the fire until a black coating forms. Drop hydrochloric acid solution on it and return into the flame.

4. Place salt crystals on the loop and put it into the flame.

5. Volcano Sheele

Conduct the experiment in a well-ventilated area.

1. Ground potassium permanganate into fine powder.

2. Pour potassium permanganate in the form of a hill into a refractory cup or on a ceramic tile.

3. At the top of the hill, make a small deepening.

4. Add a few drops of anhydrous glycerin in the deepening. Don’t forget to put on protective gloves and glasses.

5. Watch what is happening and record your observations.

6. Chemical Snake

Conduct the experiment on the plastic tray and in a well-ventilated area.

Keep a bowl of water nearby when working with fire.

Don’t forget to put on protective gloves and glasses.

1. Mix very good 1 teaspoon of sodium bicarbonate and 3 teaspoons of calcium gluconate or powdered sugar.

2. Place a sheet of foil on a refractory stand.

3. Put on the foil solid fuel or make a hill with a depression from sand and soak the sand with ethanol.

4. Pour the mix (soda with calcium gluconate/powdered sugar) on top and set fire to it. Caution: hot!

5. Watch what is happening and record your observations.

7. Foil Destruction

Conduct the experiment in a laboratory fume-hood.

1. Form a cup from the foil.

2. Place the foil cup on the beaker.

3. Secure the foil on the beaker (press the edges of the foil around the beaker).

4. Prepare a copper sulfate CuSO4 solution directly in the foil cup: 1 spoon CuSO4 + 3 ml water.

5. Add 1 spoon sodium chloride NaCl. Be aware that the reaction mixture can splash.

6. Watch what is happening and record your observations.

8. Magic Movement

1. Cut a circle out of paper.

2. Draw a spiral inside the circle.

3. Cut out the spiral.

4. Make the base from cardboard and glue a stick or pencil vertically to it.

5. Hang the spiral on the stick/pencil.

6. Light a candle and place it close to the spiral. Be careful not to light up the paper.

7. Watch what is happening and record your observations.

9. Water Rise

1. Cut paper towel or filter paper into strips (each about 2.5 cm wide and 25 cm long).

2. Draw a marker line across the width of first paper strip, about 5 cm from the bottom end.

3. Apply multicolored dots with markers in a row on second paper strip.

4. On twine, draw several marks at a distance from each other with markers of different colors.

5. Pour water into glasses (about 5 cm).

6. Dip 1 cm of the paper strips with drawing and the twine into the different glasses (of not colored water).

7. Fix strips using binder clips.

8. Color water in other glasses (use different colors).

9. Put one end of the paper strips without drawing in the colored water and one end into the empty glass.

10. You can put into the empty glass the ends of different paper strips (yellow and blue, red and blue, red and yellow).

11. Watch what is happening and record your observations.

10. Dancing Fluids

1. Pour water into the glass (2/3 of the volume).

2. Then pour a layer of vegetable oil.

3. Add a dye into a glass of water and mix it.

4. Gently drip colored water into the beaker.

5. Add periodic a little salt to the glass.

6. Watch what is happening and record your observations.

11. Ocean in the Bottle

1. Fill the bottle halfway with water.

2. Add blue dye to the water and mix it.

3. Make a float from a cork with such weight that it floats on water, but drown in vegetable oil.

4. Throw the float into the bottle.

5. Add vegetable oil.

6. Close the bottle tightly.

7. Turn the bottle horizontally and tilt it to the right and left.

8. Watch what is happening and record your observations.

12. Non-Newtonian Fluid

1. Mix starch with water.

2. Add dye.

3. Immerse your fingers slowly in the fluid. Then punch on the surface of this fluid.

4. Cover the speaker with film.

5. Pour the prepared mix onto the speaker.

6. Turn on bass-rich music.

7. Watch what is happening and record your observations.

13. Fluids and Through the Looking Glass

Fluids and Glass

1. Fill the first glass with water and put a glass stick into it.

2. Fill the second glass with sunflower oil and put the glass stick into it.

3. Fill the third glass half full with water. Then add vegetable oil and put the glass stick into it.

4. Watch what is happening and record your observations.

Water Mirror

1. Draw a right arrow on the paper.

2. Fill the glass with water.

3. Put the paper with the drawing behind the glass of water and look at the arrow.

4. Record your observations.

14. Strong Water

Water and Paper

1. Fill the glass completely with water.

2. Cover the glass with a sheet of paper.

3. Put your palm on the paper and turn the glass over.

4. While you holding the glass upside down, remove the palm.

5. Watch what is happening and record your observations.

Water and Gauze

1. Fold the gauze.

2. Cover the glass with the folded gauze and fix with an elastic band.

3. Pour water into the glass through the gauze.

4. Cover the gauze with your palm and turn the glass over.

5. While you holding the glass upside down, remove your palm.

6. Insert one by one the toothpicks through the gauze into the upturned glass.

7. Watch what is happening and record your observations.

15. Electroscope

1. Insert the wire into the hole in the lid. The lid should be in the middle of the wire. Fix the wire using hot glue.

2. Bend the upper end of the wire and wrap aluminum foil around it, forming a ball. Squeeze the ball so that it fixes on the wire.

3. Bend the lower end of the wire and make a hook about 2.5 cm long.

4. Cut a strip from aluminum foil and bend it in half.

5. Hang the bended foil strip on the hook.

6. Place the end of the wire with the hanged aluminum foil strip into the jar and close the jar with the lid.

7. Rub the balloon (or other objects) on the woolly thing or on your hair.

8. Bring the balloon (each object) to the aluminum ball on the electroscope.

9. Watch what is happening and record your observations.

16. Balloon Experiments

Chemical Inflating of Balloon

1. Dissolve soda in a glass of water.

2. Pour the solution into a bottle.

3. Mix lemon juice and vinegar.

4. Add the solution into the bottle and quickly secure a balloon around the mouth of the bottle, tightly tape the balloon to the bottle.

5. Watch what is happening and record your observations.

6. When the balloon inflates, remove it from the bottle.

Magnetic Balloon

1. Blow up the balloon and tie off the end (use thread).

2. Cut a paper into small pieces.

3. Rub the balloon on the woolly object or onto your hair.

4. Hold the balloon by the thread and bring it close to the pieces of paper, to a stream of running water and to each of the materials/objects.

5. Watch what is happening and record your observations.

Burst Balloon with Citrus Fruit

1. Inflate a balloon and tie it with a thread.

2. Cut the peel of a fresh lemon.

3. Squeeze the juice from the lemon peel above the ball or touch the balloon with the lemon peel.

4. Watch what is happening and record your observations.

17. Color Change Solution

1. Mix in a beaker 200 mg sodium sulfate Na2SO4 and 2 mg potassium permanganate KMnO4.

2. Add 5 ml saturated calcium hydroxide solution Ca(OH)2.

3. Close the beaker securely and shake vigorously. Ensure the resulting solution is transparent.

4. Add 2 drops of 10% aqueous glycerol solution to the resulting violet solution.

5. Close the beaker securely and shake vigorously.

6. Watch what is happening and record your observations.

18. Colored Liquid

1. Prepare a solution of a pH indicator thymol blue: 1 spoon thymol blue + water.

2. Prepare solutions with different pH: glass #1 - NaHSO4 10 drops, glass #2 - citric acid 5 drops, #3 – citric acid 5 drops + Na2CO3 5 drops, #4 – NaHCO3 1/2 spoon, #5 - Na2CO3 5 drops.

3. Add the pH indicator solution to the glasses.

4. Watch what is happening and record your observations.

19. Chemical Ink Eraser

1. Draw something on a piece of paper with a ballpoint pen.

2. Add a little potassium permanganate (KMnO4) into a test tube and add vinegar.

3. Moisten a cotton swab in the solution and swipe it on the drawing.

4. Moisten a second cotton swab with water and rinse off any stains.

5. Blot the drawing with a napkin.

6. Put hydrogen peroxide (H2O2) on the drawing and also blot with the napkin.

7. Iron or place under a press.

8. Watch what is happening and record your observations.

20. Lemon Volcano

1. Cut the lemon in half.

2. Squeeze the juice from one half.

3. At the second half of the lemon, cut off the top and the core so that it looks like the mouth of a volcano.

4. Using a spoon, gently soften the “mouth” of the volcano.

5. Add soda to the "mouth" of the volcano.

6. To continue the reaction, add pre-squeezed juice and soda to the "mouth" of the volcano.

7. Add to the "mouth" of the volcano liquid soap mixed with a little water, food colors.

8. Watch what is happening and record your observations.

21. Chemical Jellyfishes

1. Pour the sodium silicate (liquid glass) solution into the Petri dish or plate.

2. Add 4-5 drops of each solution of metal compounds (called metal salts) CuSO4, MnSO4, FeCL3, FeSO4 to the surface of the sodium silicate solution (drop by drop from various heights).

3. Watch what is happening and record your observations.

4. To preserve the experiment results, leave to dry completely the chemical jellyfishes 2-3 weeks.

5. Dispose of solid waste together with household garbage. Pour solutions down the sink. Wash with an excess of water.

22. Dry Paper in Water

1. Write your name on a piece of paper.

2. Fold the piece of paper and put it on the bottom of the glass so that it does not fall out.

3. Turn the glass over and dip it in water.

4. Remove the glass from the water and check the leaf - it is dry.

5. Record your observations.

General safety rules

  • Do not allow chemicals to come into contact with the eyes or mouth. Do not eat or drink the reagents or the experiments!
  • Wear eye protection during the experiment.
  • Keep people not wearing eye protection away from the experimental area.
  • Clean all equipment after use (ask teacher how to do it).
  • Make sure that all containers are fully closed and properly stored after use.
  • Ensure that all empty containers are disposed of properly.
  • Do not use any equipment which has not been supplied with the box or recommended in the instructions for use.
  • Ask teacher how to dispose of chemicals.

You need to know that copper sulfate can be toxic to fish and other aquatic organisms. Do not dump copper sulfate into local streams, ponds or waterways. Never allow copper sulfate to be washed away in runoff; and do not permit copper sulfate to drain away into the soil. o not dump copper sulfate into local streams, ponds or waterways. Sweep up solid crystals or dust from copper sulfate; these can be safely disposed of in the trash. Flush small quantities of dissolved copper sulfate down the drain, and use plenty of water. If you have large quantities of copper sulfate, rules for how to handle may vary depending on your location (consult your county environmental department for guidelines on how to handle the situation).

General first aid information

  • In case of eye contact: Wash out eye with plenty of water, holding eye open if necessary. Seek immediate medical advice.
  • If swallowed: Wash out mouth with water, drink some fresh water. Do not induce vomiting. Seek immediate medical advice.
  • In case of inhalation: Remove person to fresh air.
  • In case of skin contact and burns: Wash affected area with plenty of water for at least 10 minutes.
  • In case of doubt, seek medical advice without delay. Take the chemical and its container with you.
  • In case of injury always seek medical advice.

Step 3: Making Boxes and Packing Materials for Experiments

Make cardboard boxes for each experience. You can make boxes only for the necessary reagents, small things (for example, a piece of foil, paper, tape etc.) and write on the box what additional materials student needs to conduct this experiment (for example, glasses, fresh lemons, etc.).

Collect reagent storage containers.

Make packages from kraft paper, tracing paper, film.

Sign the titles of the experiments on the boxes and make additional marks (for example, is fire used in this experiment).

Mark on the boxes the difficulty level of the experiments. You can make it with a colored strips or signs: green for an easy level, yellow for an average, red for a difficult level.

Do not try to paint boxes. Better your students decorate them later.

Fill the boxes with the necessary materials and reagents.

Remember to put in the boxes the printed step-by-step experiment instructions.

Step 4: Lesson 1. Demonstration by the Teacher of Experiments

Demonstrate yourself several experiments to your students. Don't forget to wear protective gloves and glasses and work in a well-ventilated room. Observe safety rules when working with fire and flammable liquids.

Draw the attention of your students to the features of the experiments, ask their opinion why this happens, how they see the process, what processes, in their opinion, are involved, etc. Ask them to document (write down) the steps of experiment. Your task is to involve students in the process of the experiment, to arouse interest in them in experimental research.

Step 5: Lesson 2. Self-Familiarization of Students With the Experiment Instructions and Performing Experiments

Discuss the warnings and safety information with the students before commencing the experiments. Particular attention should be paid to the safe handling of acids, alkalis and flammable liquids.

Check that the area surrounding the experiment is clear, the room (lab) is well lit and ventilated and close to a water supply, the tables are solid and with heat resistant top. Provide all students with protective gloves and glasses.

Divide the students into groups and give them the boxes and the necessary materials.

Give your students the opportunity to perform the experiments by themselves. Help them if necessary, control the most complex processes, but do not overdo it. Let your students figure out the process on their own. Ask students to record the processes of the experiments.

Step 6: Lesson 3. Making Decorating for Experiments and Preparing to Show the Experiments in Front of the Class

To make the experiments look even more interesting, ask your students to make different decorating things. Discuss with them what can be added and what safety is not possible due to technology.
Invite them to make decorating things. For example your students can paint liquids in different colors and use back-light, make a small boat out of cork, draw different faces on the balls, glue small additional elements from paper or thread (hands, hair, bows, etc.), for experiment Atmospheric Pressure and Balloon paint a whale on the flask/jar with an open mouth, for Pop Balloon Using Lemon cut out the shark-shaped lemon and so on.

Step 7: Lesson 4, 5. Physics Vs Chemistry in Front of the Class

Organize the show of experiments by your students in front of the class.

Prepare the questions for your students. For example:

for experiment #1: Hot or cold air has greater pressure? Why do you think that?

for experiment #2: Why the candle seesaw is moving? Where is the fulcrum of your candle seesaw? Do you think it would make a difference if both candles were lighted simultaneously?

for experiment #3:

Discuss the experiments with your students.

Step 8: Lesson 6, 7. Physics Vs Chemistry in Front of a Large Audience

Choose with students the best experiments and organize the show Physics vs Chemistry in front of a large audience (parents, other students). I'm sure that it will be very interesting show.

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