Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 706 · 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.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a balloon (b) a white flower (c) a few hours of waiting (d) a glass of water
2. 2.🥚 A fresh egg sinks in plain water. What makes it float? (a) more plain water (b) a few ice cubes (c) a little shaking (d) lots of salt stirred in
3. 3.⚖️ 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 measure it (b) we change it (c) we keep it the same
4. 4.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) faster (c) it floats up (d) it stops in the air
5. 5.🛟 Does a ping-pong ball float or sink in water? (a) floats (b) sinks
6. 6.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) False (b) True
7. 7.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a tall clear glass (c) water with food colour (d) a battery cell
8. 8.🔍 Which is the odd one out? (a) wet hair drying (b) a pond icing over (c) water becoming ice (d) making ice lollies
9. 9.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the amount of water (b) the amount of colour (c) time for colour to show (d) the length of the stem
10. 10.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they separate again (c) they turn to honey (d) they mix for ever
11. 11.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) on top of the oil (c) under the honey (d) in the honey layer
13. 13.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is what we measure. (a) False (b) True
14. 14.🛟 Does a piece of thermocol float or sink in water? (a) sinks (b) floats
15. 15.🍯 Is a ping-pong ball denser or less dense than water? (a) denser than water (b) less dense than water
16. 16.🧺 Which of these is not needed for the water cycle bowl? (a) a big bowl (b) turmeric powder (c) cling film (d) water
17. 17.🍯 Which of these is less dense than water? (a) a glass marble (b) honey (c) a cork (d) very salty water
18. 18.💧 Which change is this: ice becoming water? (a) evaporation (b) melting (c) condensation (d) freezing
19. 19.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) honey (c) a teaspoon (d) warm water
20. 20.🛟 Where is a safe place to drop the helicopter from? (a) a roof edge (b) from your raised hand (c) a high window ledge (d) a wobbly chair
21. 21.🌈 In VIBGYOR, what number colour is violet?
22. 22.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a battery cell (b) a glass of water (c) a few hours of waiting (d) food colour
23. 23.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) pour it on the floor (c) taste each layer (d) throw the glass
24. 24.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) turmeric powder
25. 25.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of pouring”? (a) we change it (b) we measure it (c) we keep it the same
26. 26.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the slope of the string (b) the same string (c) the same straw (d) distance it travels
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we change it (b) we keep it the same (c) we measure it
28. 28.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to drops (b) it turns to smoke (c) it turns to salt (d) it disappears
29. 29.⚖️ 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) brightness of rainbow (b) the same white paper (c) the time of day (d) the amount of water
30. 30.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it floats away (c) it turns all red (d) the rainbow fades
31. 31.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
32. 32.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) never look at the Sun (c) stare at the Sun (d) look at it in a mirror
33. 33.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) the water increases (b) it turns to salt (c) some water evaporates (d) it turns to ice
34. 34.🧺 Which of these is not needed for the balloon rocket? (a) a long string (b) yeast (c) two chairs (d) a balloon
35. 35.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
36. 36.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we measure it (b) we keep it the same (c) we change it
37. 37.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it turns blue (c) so it does not fall (d) so the Sun moves
38. 38.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) small test objects (c) a results table (d) yeast
39. 39.🌈 How many colours do we name in a rainbow (VIBGYOR)?
40. 40.🛟 Which scissors should children use to cut the paper? (a) safety scissors (b) sharp kitchen shears (c) gardening shears (d) a paper cutter

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