Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 145 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — density, dissolving, capillary action, light bending, air pressure, push-back, air resistance or condensation. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it turns blue (c) so it does not fall (d) so it gets hot
2. 2.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of pouring (b) how much of each liquid (c) the order of the layers (d) the same glass
3. 3.True or false: a towel for spills is needed for the float-or-sink test. (a) True (b) False
4. 4.📘 What does “dense” mean? (a) very hot (b) very thin (c) heavy for its size (d) very colourful
5. 5.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
6. 6.🛟 Which of these floats on water? (a) an iron nail (b) a cork (c) a metal key (d) a coin
7. 7.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the bowl freezes (b) more drops form (c) fewer drops form (d) the water turns red
8. 8.🥄 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) baking soda (d) sand
9. 9.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the cling film cover is kept the same. (a) True (b) False
10. 10.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of sugar (b) time to dissolve (c) the amount of water (d) the water temperature
11. 11.🌈 How many colours do we name in a rainbow (VIBGYOR)?
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sheet of white paper (b) a sunny window (c) a clear glass of water (d) a balloon
13. 13.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
14. 14.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) whether the card stays (b) the way we turn it (c) how full the glass is (d) the same glass
15. 15.💧 Which of these does not let water climb? (a) a piece of chalk (b) a sugar cube (c) a steel spoon (d) a paper towel
16. 16.True or false: a sink or a bucket is not needed for the card-on-a-glass trick. (a) False (b) True
17. 17.💧 Which of these lets water climb up it? (a) a glass marble (b) a plastic ruler (c) a flower stem (d) a rubber eraser
18. 18.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it turns into a kite (c) it changes colour (d) it gets too heavy
19. 19.🧺 Do we need a balloon for the paper helicopter? (a) not needed (b) needed
20. 20.🛟 How should you check if the sugar has dissolved? (a) smell it closely (b) look for leftover grains (c) poke it with a finger (d) taste it
21. 21.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
22. 22.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) capillary action (c) magnetism (d) melting
23. 23.🧺 Which of these is not needed for the paper helicopter? (a) safety scissors (b) a paper clip (c) a strip of paper (d) a magnet
24. 24.🧺 Which of these is needed for the paper helicopter? (a) a strip of paper (b) a battery cell (c) a magnet (d) turmeric powder
25. 25.True or false: a toy parachute falls fast through the air. (a) False (b) True
26. 26.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) a towel for spills (c) small test objects (d) a mirror
27. 27.🧺 Do we need yeast for the coloured flower experiment? (a) not needed (b) needed
28. 28.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the length of the stem (c) the kind of flower
30. 30.True or false: a mirror is needed for the balloon rocket. (a) False (b) True
31. 31.🍯 Which of these is less dense than water? (a) a pebble (b) an ice cube (c) honey (d) a glass marble
32. 32.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) turmeric powder (b) a paper clip (c) a strip of paper (d) safety scissors
33. 33.🍯 Which of these is denser than water? (a) a coin (b) an ice cube (c) air (d) a ping-pong ball
34. 34.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) wipe up spills at once (c) run around the tub (d) play near a deep pond
35. 35.🔍 Which is the odd one out? (a) cooking oil (b) an ice cube (c) a ping-pong ball (d) honey
36. 36.🧺 Which of these is not needed for the dissolving test? (a) two clear glasses (b) a teaspoon (c) sugar (d) a comb
37. 37.True or false: a ruler is needed for the paper helicopter. (a) True (b) False
38. 38.True or false: a ping-pong ball is less dense than water. (a) False (b) True
39. 39.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the water is coloured (c) the glass is painted (d) water splits the light

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