Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 99 · 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.🛟 What should you do with popped balloon pieces? (a) chew them (b) keep them in your mouth (c) give them to a baby (d) throw them away safely
2. 2.🔍 How can you get the salt back from salty water? (a) stir it more (b) add more water (c) keep it in a fridge (d) let the water evaporate
3. 3.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil makes it rain (c) spilled oil is slippery (d) oil attracts magnets
4. 4.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it sinks (c) it turns blue (d) it melts
5. 5.📘 What is the push of air on a falling thing called? (a) air resistance (b) magnetism (c) floating (d) dissolving
6. 6.⚖️ 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) the same white paper (b) the same glass (c) the amount of water (d) the same window
7. 7.🍯 Is cooking oil denser or less dense than water? (a) less dense than water (b) denser than water
8. 8.🧺 Do we need a drinking straw for the balloon rocket? (a) not needed (b) needed
9. 9.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of pouring (b) the order of the layers (c) how much of each liquid
10. 10.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a sheet of white paper (c) bright sunlight (d) a battery cell
11. 11.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) the sugar cube (c) powdered sugar (d) neither of them
12. 12.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
13. 13.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) whether it floats (b) the shape of the clay (c) the amount of clay
14. 14.🧺 Do we need a mirror for the density tower? (a) not needed (b) needed
15. 15.True or false: yeast is not needed for the water rainbow. (a) True (b) False
16. 16.🛟 Does a metal key float or sink in water? (a) floats (b) sinks
17. 17.True or false: a balloon is not needed for the balloon rocket. (a) True (b) False
18. 18.True or false: small pebbles dissolves in water. (a) True (b) False
19. 19.True or false: a big sugar cube dissolves slower. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a fridge magnet (d) a magnetic pin holder
21. 21.True or false: a mirror is needed for the balloon rocket. (a) True (b) False
22. 22.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) snow falling (d) a shadow of ice
23. 23.🧺 Do we need a mirror for the dissolving test? (a) not needed (b) needed
24. 24.⚖️ 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
25. 25.💧 Why do water drops form on the outside of a glass of ice water? (a) vapour in air cools (b) ice escapes the glass (c) the glass leaks (d) the glass sweats
26. 26.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.🧺 Which of these is not needed for the dissolving test? (a) a clock or timer (b) honey (c) cold water (d) warm water
28. 28.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) it goes faster (c) more friction, less far (d) less friction
29. 29.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) two chairs (b) sticky tape (c) a drinking straw (d) yeast
30. 30.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a battery cell (c) small test objects (d) a tub of water
31. 31.🍯 Is honey denser or less dense than water? (a) less dense than water (b) denser than water
32. 32.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is kept the same. (a) False (b) True
33. 33.🍯 Which of these is denser than water? (a) air (b) cooking oil (c) an ice cube (d) a pebble
34. 34.🔍 Which is the odd one out? (a) a pebble (b) a ball of clay (c) a steel spoon (d) an ice cube
35. 35.🔍 You drop a coin into a tub of water. What do you see? (a) it bounces up (b) it floats (c) it sinks (d) it dissolves
36. 36.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
37. 37.🛟 Which rule keeps the density tower experiment safe? (a) do not lick the spoon (b) throw the glass (c) taste each layer (d) pour it on the floor
38. 38.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) yeast (c) sunlight (d) a big bowl
39. 39.🛟 Does a feather float or sink in water? (a) floats (b) sinks
40. 40.True or false: a magnetic pin holder works by magnetism. (a) False (b) True

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