Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 397 · 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 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 tub of water (d) the kind of clay
2. 2.🍯 Is an ice cube denser or less dense than water? (a) denser than water (b) less dense than water
3. 3.True or false: an ice cube is less dense than water. (a) False (b) True
4. 4.True or false: warm water is needed for the dissolving test. (a) False (b) True
5. 5.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
6. 6.🧺 Which of these is not needed for the coloured flower experiment? (a) a battery cell (b) a glass of water (c) a white flower (d) food colour
7. 7.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) a teaspoon (c) cold water (d) a mirror
8. 8.🍯 Which of these is less dense than water? (a) a glass marble (b) very salty water (c) honey (d) a ping-pong ball
9. 9.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the honey layer (b) under the honey (c) in the water layer (d) on top of the oil
10. 10.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) not needed (b) needed
11. 11.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) safety scissors (c) a strip of paper (d) a magnet
12. 12.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a glass of water (c) a balloon (d) a stiff postcard
13. 13.🛟 How should you check if the sugar has dissolved? (a) taste it (b) poke it with a finger (c) look for leftover grains (d) smell it closely
14. 14.⚖️ 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 the one thing we change. (a) True (b) False
15. 15.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) water with food colour (c) a magnet (d) honey
16. 16.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) yeast (b) water (c) sunlight (d) cling film
17. 17.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) never look at the Sun (c) stare at the Sun (d) look at it through glass
18. 18.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
19. 19.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) a strip of paper (c) a battery cell (d) safety scissors
20. 20.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
21. 21.🌦️ To see a rainbow in the sky, where must the Sun be? (a) straight above you (b) behind you (c) under the ground (d) in front of you
22. 22.🌈 How many colours do we name in a rainbow (VIBGYOR)?
23. 23.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) the glass is painted (c) the water is coloured (d) water splits the light
24. 24.🛟 What should you do with wet floors after the experiment? (a) pour more water (b) leave them wet (c) slide on them (d) wipe them dry
25. 25.🧺 Which of these is not needed for the density tower? (a) turmeric powder (b) cooking oil (c) a spoon (d) honey
26. 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the kind of sugar”? (a) we keep it the same (b) we measure it (c) we change it
27. 27.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) slower (b) faster (c) they turn to ice (d) they never dry
28. 28.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) yellow (c) violet (d) red
29. 29.🔍 What do you see after pouring honey, water and oil into one glass? (a) three separate layers (b) one mixed colour (c) the glass gets hot (d) bubbles of gas
30. 30.🥄 Which of these dissolves faster? (a) sugar stirred well (b) sugar left unstirred (c) a big sugar cube (d) sugar in icy water
31. 31.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) play near a deep pond (c) run around the tub (d) leave water on the floor
32. 32.🔍 Which is the odd one out? (a) a glass marble (b) a rubber eraser (c) a cotton thread (d) a piece of foil
33. 33.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
34. 34.🧺 Which of these is not needed for the balloon rocket? (a) two chairs (b) a long string (c) a drinking straw (d) a mirror
35. 35.True or false: turmeric powder is not needed for the balloon rocket. (a) True (b) False
36. 36.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a tub of water (c) a results table (d) turmeric powder
37. 37.💧 Dip a rubber eraser into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
38. 38.True or false: a suction hook works by air pressure. (a) False (b) True
39. 39.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) a mirror (c) safety scissors (d) a pencil
40. 40.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic

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