Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 663 · 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.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is the one thing we change. (a) False (b) True
2. 2.True or false: a balloon is not needed for the dissolving test. (a) True (b) False
3. 3.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we keep it the same (b) we change it (c) we measure it
4. 4.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns all red (c) it turns brighter (d) the rainbow fades
5. 5.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
6. 6.🧺 Which of these is needed for the density tower? (a) a battery cell (b) a balloon (c) a magnet (d) water with food colour
7. 7.⚖️ 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 same three liquids (d) the order of the layers
8. 8.True or false: cold water is needed for the dissolving test. (a) True (b) False
9. 9.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the small pebble (b) the big log (c) both of them (d) neither of them
10. 10.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) the time we wait (b) sun or shade (c) how many drops form
11. 11.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) the bowl freezes (b) fewer drops form (c) the water turns red (d) more drops form
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a battery cell (d) a glass of water
13. 13.🛟 Where should you do the card-and-glass trick? (a) near a plug point (b) over a sink or bucket (c) on a bed (d) over a laptop
14. 14.True or false: water from the oars goes forward. (a) True (b) False
15. 15.🎈 What is the job of the straw on the string? (a) it blows air in (b) it holds water (c) it guides the balloon (d) it makes it heavier
16. 16.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sunny window (c) a clear glass of water (d) a balloon
17. 17.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls slowly (b) falls fast
18. 18.True or false: an ice cube is less dense than water. (a) False (b) True
19. 19.🛟 What should you do after handling food colour? (a) wash your hands (b) rub your eyes (c) wipe them on walls (d) lick your fingers
20. 20.🧺 Do we need cotton wool for the dissolving test? (a) not needed (b) needed
21. 21.⚖️ 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) how full the glass is (b) the same glass (c) the way we turn it (d) the same card
22. 22.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the amount of water (b) the same glass (c) the time of day (d) the same white paper
23. 23.🔮 A cork floats in tap water. What happens in very salty water? (a) it turns white (b) it dissolves (c) it sinks (d) it still floats
24. 24.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
25. 25.🥄 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) no change at all (c) more friction, less far (d) less friction
27. 27.True or false: a comb is not needed for the dissolving test. (a) False (b) True
28. 28.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the order of pouring (b) the same glass (c) the order of the layers (d) how much of each liquid
29. 29.🧺 Which of these is needed for the float-or-sink test? (a) a mirror (b) a magnet (c) yeast (d) small test objects
30. 30.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) a roof edge (c) a wobbly chair (d) from your raised hand
31. 31.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) whether it floats (b) the amount of clay (c) the kind of clay (d) the tub of water
33. 33.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to stop the spinning (b) to make it magnetic (c) to weigh down the bottom (d) to make it fall slower
34. 34.🌼 How does coloured water reach the petals? (a) through tiny stem tubes (b) it is sprayed on (c) it rains on them (d) through the air
35. 35.🌊 What pushes a floating cork upward? (a) the air above (b) the tub (c) the water (d) the cork itself
36. 36.🍯 Which of these is less dense than water? (a) honey (b) a glass marble (c) an ice cube (d) a coin
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.☀️ What is white sunlight really made of? (a) many colours mixed (b) tiny drops of water (c) only yellow light (d) tiny bits of dust
39. 39.🚁 Why does the paper helicopter fall slowly? (a) it has no weight (b) a magnet holds it (c) air pushes on its blades (d) the floor pushes it
40. 40.🧺 Do we need a battery cell for the float-or-sink test? (a) needed (b) not needed

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