Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 735 · 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: a clear glass of water is needed for the water rainbow. (a) False (b) True
2. 2.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is the one thing we change. (a) True (b) False
3. 3.🧺 Do we need a balloon for the balloon rocket? (a) not needed (b) needed
4. 4.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we change it (b) we measure it (c) we keep it the same
5. 5.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) honey (b) sugar (c) warm water (d) a clock or timer
6. 6.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a long string (c) two chairs (d) vinegar
7. 7.True or false: a mirror is needed for the balloon rocket. (a) True (b) False
8. 8.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the big log (b) neither of them (c) both of them (d) the small pebble
9. 9.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) sand (c) water (d) air
10. 10.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the water temperature (b) the kind of sugar (c) time to dissolve
11. 11.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is what we measure. (a) False (b) True
12. 12.True or false: cling film is not needed for the water cycle bowl. (a) True (b) False
13. 13.🍯 Which of these is less dense than water? (a) honey (b) a glass marble (c) a pebble (d) a cork
14. 14.📘 What is it called when water climbs up thin tubes or paper by itself? (a) magnetism (b) evaporation (c) capillary action (d) melting
15. 15.🛟 Does a coin float or sink in water? (a) sinks (b) floats
16. 16.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the drop height (b) the kind of paper (c) the length of the blades (d) time to reach the floor
17. 17.🥄 Which of these dissolves in water? (a) small pebbles (b) cooking oil (c) chalk powder (d) glucose powder
18. 18.💧 Which change is this: dew on morning grass? (a) melting (b) condensation (c) freezing (d) evaporation
19. 19.🛟 Does a piece of thermocol float or sink in water? (a) floats (b) sinks
20. 20.⚖️ 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) the way we turn it (b) the same glass (c) how full the glass is (d) the same card
21. 21.True or false: yeast is needed for the density tower. (a) False (b) True
22. 22.🌊 What pushes a floating cork upward? (a) the air above (b) the cork itself (c) the water (d) the tub
23. 23.True or false: a cork sinks in water. (a) True (b) False
24. 24.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🥄 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
26. 26.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a clear glass of water (c) a sheet of white paper (d) a sunny window
27. 27.True or false: a battery cell is needed for the paper helicopter. (a) True (b) False
28. 28.🧺 Which of these is not needed for the float-or-sink test? (a) small test objects (b) a towel for spills (c) a results table (d) a battery cell
29. 29.⚖️ 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 the one thing we change. (a) False (b) True
30. 30.⚖️ 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 the one thing we change. (a) False (b) True
31. 31.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the amount of water (b) the same glass (c) brightness of rainbow (d) the time of day
32. 32.🌦️ To see a rainbow in the sky, where must the Sun be? (a) behind you (b) in front of you (c) straight above you (d) under the ground
33. 33.🧺 Do we need a long string for the balloon rocket? (a) not needed (b) needed
34. 34.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.⚖️ 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) False (b) True
36. 36.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) less friction (c) more friction, less far (d) it goes faster
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a sink or a bucket (d) a magnet
39. 39.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic chess set (c) a bicycle pump (d) a fridge magnet
40. 40.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) from your raised hand (c) a roof edge (d) a wobbly chair

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