Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 189 · 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 needed for the water rainbow? (a) yeast (b) a sunny window (c) a battery cell (d) a magnet
2. 2.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they separate again (b) they become solid (c) they mix for ever (d) they turn to honey
3. 3.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) nothing ever happens (b) it turns to plastic (c) colour climbs up it (d) it sinks at once
4. 4.🧺 Do we need a balloon for the float-or-sink test? (a) needed (b) not needed
5. 5.🚁 Which of these falls fast through the air? (a) a coin (b) a paper helicopter (c) a feather (d) a fluff of cotton
6. 6.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the amount of water (b) the water temperature (c) time to dissolve (d) the stirring
7. 7.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a pencil (c) a mirror (d) a paper clip
8. 8.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
9. 9.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “how many drops form”? (a) we keep it the same (b) we measure it (c) we change it
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) brightness of rainbow (b) the same white paper (c) the amount of water
11. 11.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) a roof edge (c) from your raised hand (d) a high window ledge
12. 12.True or false: snow turning to water is condensation. (a) True (b) False
13. 13.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is the one thing we change. (a) True (b) False
14. 14.True or false: a drinking straw works by air pressure. (a) True (b) False
15. 15.🧺 Which of these is not needed for the float-or-sink test? (a) a tub of water (b) a results table (c) small test objects (d) a battery cell
16. 16.🔮 A big log and a small pebble go into a pond. Which one floats? (a) neither of them (b) both of them (c) the big log (d) the small pebble
17. 17.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) stare at the Sun (c) look at it through glass (d) never look at the Sun
18. 18.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is the one thing we change. (a) False (b) True
19. 19.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is the one thing we change. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a coin (b) a pebble (c) honey (d) a cork
22. 22.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a tub of water (c) small test objects (d) a magnet
23. 23.True or false: a battery cell is needed for the card-on-a-glass trick. (a) False (b) True
24. 24.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
25. 25.🚁 What does the paper helicopter do as it falls? (a) it turns into a ball (b) it stays still in air (c) it flies upward (d) it spins round
26. 26.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a balloon (b) a ruler (c) a paper clip (d) safety scissors
27. 27.🔍 What do you see after pouring honey, water and oil into one glass? (a) the glass gets hot (b) one mixed colour (c) bubbles of gas (d) three separate layers
28. 28.🥄 Which of these dissolves slower? (a) sugar in warm water (b) sugar stirred well (c) powdered sugar (d) sugar in icy water
29. 29.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a tub of water (c) turmeric powder (d) a results table
30. 30.🚀 Which of these goes backward? (a) the rowing boat (b) the rocket (c) the swimmer (d) gas from the rocket
31. 31.⚖️ 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 colour (b) the kind of flower (c) the amount of water (d) the length of the stem
32. 32.True or false: turmeric powder is needed for the coloured flower experiment. (a) False (b) True
33. 33.🧺 Do we need yeast for the balloon rocket? (a) not needed (b) needed
34. 34.🔍 Which is the odd one out? (a) a toy parachute (b) a steel spoon (c) a stone (d) a glass marble
35. 35.True or false: a magnet is not needed for the card-on-a-glass trick. (a) True (b) False
36. 36.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the water temperature (b) the stirring (c) time to dissolve
37. 37.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
38. 38.🌈 In VIBGYOR, what number colour is yellow?
39. 39.True or false: cold water is needed for the dissolving test. (a) False (b) True
40. 40.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) run around the tub (c) wipe up spills at once (d) play near a deep pond

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