Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 115 · 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.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) turmeric powder (c) a stiff postcard (d) a glass of water
2. 2.🥄 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the small pebble (b) both of them (c) neither of them (d) the big log
4. 4.🧺 Which of these is not needed for the water rainbow? (a) a balloon (b) a sheet of white paper (c) a sunny window (d) bright sunlight
5. 5.True or false: water becoming ice is evaporation. (a) True (b) False
6. 6.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a high window ledge (c) a wobbly chair (d) a roof edge
7. 7.⚖️ 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 shape of the clay (c) the amount of clay (d) the tub of water
8. 8.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the amount of water is the one thing we change. (a) True (b) False
9. 9.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) how big we blow it (b) the same straw (c) the same string (d) distance it travels
10. 10.True or false: yeast is not needed for the water rainbow. (a) True (b) False
11. 11.🥄 Which of these dissolves slower? (a) sugar in icy water (b) sugar stirred well (c) powdered sugar (d) sugar in warm water
12. 12.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🚁 Why does the paper helicopter fall slowly? (a) air pushes on its blades (b) it has no weight (c) a magnet holds it (d) the floor pushes it
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is what we measure. (a) True (b) False
15. 15.True or false: warm water is not needed for the dissolving test. (a) True (b) False
16. 16.True or false: a suction hook works by air pressure. (a) False (b) True
17. 17.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we keep it the same (b) we change it (c) we measure it
18. 18.⚖️ 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 way we turn it (c) whether the card stays (d) the same card
19. 19.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
20. 20.🛟 Does a steel spoon float or sink in water? (a) floats (b) sinks
21. 21.True or false: a balloon is not needed for the water rainbow. (a) True (b) False
22. 22.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a magnet (b) a big bowl (c) sunlight (d) cling film
23. 23.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a magnet (c) a glass of water (d) a sink or a bucket
24. 24.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) no change at all (c) it goes faster (d) more friction, less far
25. 25.💧 Dip a piece of foil into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
26. 26.🔮 Predict: you put ice cubes on top of the cling film. What happens? (a) fewer drops form (b) the water turns red (c) more drops form (d) the bowl freezes
27. 27.True or false: a magnet is not needed for the float-or-sink test. (a) False (b) True
28. 28.🧺 Which of these is needed for the paper helicopter? (a) a paper clip (b) yeast (c) turmeric powder (d) a balloon
29. 29.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to win a prize (c) to hide the corks (d) to splash everyone
30. 30.🔍 Which is the odd one out? (a) a strip of cloth (b) a piece of chalk (c) a sugar cube (d) a piece of foil
31. 31.🔮 Predict: the string slopes uphill. What happens? (a) it goes backward first (b) it travels farther (c) it travels less far (d) it speeds up
32. 32.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) a clear glass of water (d) a magnet
33. 33.🥛 Which of these works by air pressure? (a) a compass needle (b) a bicycle pump (c) a fridge magnet (d) a magnetic chess set
34. 34.🚀 Which of these goes forward? (a) water a swimmer pushes (b) water from the oars (c) the rocket (d) gas from the rocket
35. 35.🌈 How many colours do we name in a rainbow (VIBGYOR)?
36. 36.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it sinks faster (b) it dissolves (c) it can float (d) it turns to stone
37. 37.🥛 Which of these works by air pressure? (a) a compass needle (b) a medicine dropper (c) a magnetic pin holder (d) a fridge magnet
38. 38.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the oil layer (b) in the water layer (c) on top of the oil (d) at the very bottom
39. 39.🌈 In VIBGYOR, what number colour is yellow?
40. 40.🍯 Which of these is denser than water? (a) a cork (b) air (c) very salty water (d) a ping-pong ball

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