Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 541 · 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.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
2. 2.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the drop height (b) time to reach the floor (c) the kind of paper (d) the length of the blades
3. 3.🧺 Do we need a magnet for the balloon rocket? (a) needed (b) not needed
4. 4.🧺 Do we need turmeric powder for the density tower? (a) needed (b) not needed
5. 5.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) yeast (c) small test objects (d) a tub of water
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is kept the same. (a) False (b) True
7. 7.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) yeast (c) a balloon (d) sticky tape
8. 8.True or false: a pebble is denser than water. (a) True (b) False
9. 9.True or false: the balloon goes backward. (a) False (b) True
10. 10.True or false: a battery cell is not needed for the float-or-sink test. (a) True (b) False
11. 11.⚖️ 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) how much of each liquid (b) the same three liquids (c) the order of the layers (d) the order of pouring
12. 12.🛟 Does a ball of clay float or sink in water? (a) sinks (b) floats
13. 13.🧺 Do we need turmeric powder for the coloured flower experiment? (a) needed (b) not needed
14. 14.🧺 Do we need sugar for the dissolving test? (a) needed (b) not needed
15. 15.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a tub of water (c) a balloon (d) small test objects
16. 16.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is kept the same. (a) False (b) True
17. 17.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is kept the same. (a) False (b) True
18. 18.📘 What is water vapour? (a) tiny ice cubes (b) a kind of smoke (c) salty water (d) water as a gas
19. 19.🛟 What should you do after handling food colour? (a) rub your eyes (b) wash your hands (c) wipe them on walls (d) lick your fingers
20. 20.🍯 Is a ping-pong ball denser or less dense than water? (a) less dense than water (b) denser than water
21. 21.🚢 Why can a heavy steel ship float on the sea? (a) steel is very light (b) sea water is warm (c) its hollow shape (d) it has a magnet
22. 22.🧺 Do we need a balloon for the coloured flower experiment? (a) not needed (b) needed
23. 23.💧 Which change is this: ice becoming water? (a) evaporation (b) freezing (c) condensation (d) melting
24. 24.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) air pressure (b) magnetism
25. 25.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) prisms (c) balloons (d) magnets
26. 26.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a white flower (c) a few hours of waiting (d) yeast
27. 27.True or false: a mirror is not needed for the dissolving test. (a) False (b) True
28. 28.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) a roof edge (c) from your raised hand (d) a wobbly chair
29. 29.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we keep it the same (b) we change it (c) we measure it
30. 30.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the honey layer (c) in the water layer (d) on top of the oil
31. 31.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the tub of water (b) the kind of clay (c) the amount of clay (d) the shape of the clay
32. 32.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) run around the tub (c) wipe up spills at once (d) play near a deep pond
33. 33.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) a magnet (d) a glass of water
34. 34.🔍 Which is the odd one out? (a) an empty capped bottle (b) a dry leaf (c) a pebble (d) a ping-pong ball
35. 35.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: how big we blow it is kept the same. (a) True (b) False
36. 36.True or false: a clock or timer is not needed for the dissolving test. (a) True (b) False
37. 37.🧺 Do we need water with food colour for the density tower? (a) needed (b) not needed
38. 38.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the petals turn red (c) no colour change (d) the flower glows
39. 39.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the person dropping (b) the drop height (c) time to reach the floor (d) the paper clip
40. 40.True or false: a sheet of white paper is not needed for the water rainbow. (a) True (b) False

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