Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 176 · 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 wet floors after the experiment? (a) wipe them dry (b) pour more water (c) slide on them (d) leave them wet
2. 2.🔍 You drop a coin into a tub of water. What do you see? (a) it floats (b) it dissolves (c) it bounces up (d) it sinks
3. 3.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is what we measure. (a) True (b) False
4. 4.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
5. 5.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
6. 6.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to splash everyone (b) to hide the corks (c) to keep children safe (d) to win a prize
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) time to dissolve (b) the amount of water (c) the kind of sugar (d) the stirring
8. 8.True or false: water from the oars goes backward. (a) False (b) True
9. 9.🧺 Which of these is not needed for the dissolving test? (a) warm water (b) cotton wool (c) two clear glasses (d) cold water
10. 10.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the kind of paper is what we measure. (a) True (b) False
11. 11.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) bright sunlight (d) a battery cell
12. 12.True or false: yeast is not needed for the density tower. (a) False (b) True
13. 13.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a white flower (c) food colour (d) a magnet
14. 14.True or false: cooking oil is needed for the density tower. (a) True (b) False
15. 15.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) how big we blow it (b) the same straw (c) distance it travels (d) the same tape
16. 16.🧺 Do we need a ruler for the paper helicopter? (a) needed (b) not needed
17. 17.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
18. 18.True or false: a strip of cloth lets water climb up it. (a) False (b) True
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 change it (b) we keep it the same (c) we measure it
20. 20.💧 Which of these lets water climb up it? (a) a glass marble (b) a rubber eraser (c) a paper towel (d) a plastic ruler
21. 21.🌊 What pushes a floating cork upward? (a) the cork itself (b) the water (c) the air above (d) the tub
22. 22.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
23. 23.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a magnet (c) a sunny window (d) a sheet of white paper
24. 24.True or false: air from the balloon goes forward. (a) True (b) False
25. 25.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is the one thing we change. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) a paper helicopter (b) a toy parachute (c) a crumpled paper ball (d) a feather
27. 27.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) a white flower (d) yeast
28. 28.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
29. 29.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) the stem is hot (c) petals are magnetic (d) petals lose water to air
30. 30.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) powdered sugar (c) the sugar cube (d) neither of them
31. 31.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the amount of water (b) how many drops form (c) the time we wait (d) sun or shade
32. 32.True or false: a balloon is needed for the balloon rocket. (a) True (b) False
33. 33.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they mix for ever (b) they turn to honey (c) they separate again (d) they become solid
34. 34.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) a clock or timer (c) a mirror (d) a teaspoon
35. 35.🧊 Why does an ice cube float on water? (a) ice is very cold (b) water is sticky (c) ice is less dense (d) ice is magnetic
36. 36.🔍 Which is the odd one out? (a) a cork (b) honey (c) cooking oil (d) a ping-pong ball
37. 37.🥄 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns all red (c) it turns brighter (d) the rainbow fades
39. 39.True or false: a coin is denser than water. (a) True (b) False
40. 40.💧 What happens to water vapour when it touches the cold cling film? (a) it turns to smoke (b) it disappears (c) it turns to salt (d) it turns to drops

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