Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 915 · 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 amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we measure it (b) we keep it the same (c) we change it
2. 2.True or false: honey is needed for the dissolving test. (a) True (b) False
3. 3.True or false: a teaspoon is not needed for the dissolving test. (a) False (b) True
4. 4.True or false: a mirror is needed for the water rainbow. (a) False (b) True
5. 5.🔮 A cork floats in tap water. What happens in very salty water? (a) it still floats (b) it turns white (c) it sinks (d) it dissolves
6. 6.🛟 Which of these floats on water? (a) a ping-pong ball (b) an iron nail (c) a glass marble (d) a steel spoon
7. 7.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) clouds (c) prisms (d) magnets
8. 8.⚖️ 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) the same glass (b) the order of pouring (c) how much of each liquid (d) the same three liquids
9. 9.⚖️ 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 keep it the same (b) we measure it (c) we change it
10. 10.🛟 What should you do after handling food colour? (a) wipe them on walls (b) lick your fingers (c) wash your hands (d) rub your eyes
11. 11.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a sunny window (c) a battery cell (d) a sheet of white paper
12. 12.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
13. 13.🔍 Which is the odd one out? (a) wet hair drying (b) sweat drying on skin (c) wet clothes drying (d) ice becoming water
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is kept the same. (a) True (b) False
15. 15.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) a teaspoon (c) a balloon (d) two clear glasses
16. 16.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
17. 17.🧺 Do we need water with food colour for the density tower? (a) needed (b) not needed
18. 18.🔍 Which is the odd one out? (a) a compass needle (b) a suction hook (c) a medicine dropper (d) a bicycle pump
19. 19.⚖️ 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 measure it (b) we keep it the same (c) we change it
20. 20.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the flower glows (c) no colour change (d) the petals turn red
21. 21.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a stiff postcard (c) a towel (d) yeast
22. 22.True or false: a cotton thread does not let water climb. (a) False (b) True
23. 23.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a clear glass of water (c) a mirror (d) bright sunlight
24. 24.📘 What is the push of air on a falling thing called? (a) magnetism (b) dissolving (c) floating (d) air resistance
25. 25.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) the rainbow fades (d) it turns brighter
26. 26.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil attracts magnets (c) oil turns into honey (d) oil makes it rain
27. 27.🧺 Do we need honey for the density tower? (a) not needed (b) needed
28. 28.True or false: water a swimmer pushes goes forward. (a) False (b) True
29. 29.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is heavier (c) oil is sticky (d) oil is less dense
30. 30.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to win a prize (c) to splash everyone (d) to keep children safe
31. 31.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) they turn to ice (b) they never dry (c) slower (d) faster
32. 32.True or false: a sheet of white paper is needed for the water rainbow. (a) False (b) True
33. 33.🔍 What do you see after pouring honey, water and oil into one glass? (a) three separate layers (b) one mixed colour (c) bubbles of gas (d) the glass gets hot
34. 34.True or false: sugar left unstirred dissolves faster. (a) True (b) False
35. 35.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it can float (b) it turns to stone (c) it dissolves (d) it sinks faster
36. 36.🔍 How can you get the salt back from salty water? (a) keep it in a fridge (b) add more water (c) stir it more (d) let the water evaporate
37. 37.🔍 Which is the odd one out? (a) a stone (b) a glass marble (c) a steel spoon (d) a feather
38. 38.🧺 Do we need a mirror for the density tower? (a) not needed (b) needed
39. 39.🛟 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
40. 40.True or false: a big bowl is needed for the water cycle bowl. (a) True (b) False

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