Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 96 · 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.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
2. 2.🧺 Which of these is needed for the balloon rocket? (a) a mirror (b) turmeric powder (c) a balloon (d) a magnet
3. 3.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) a sheet of glass (b) the flat sheet (c) the crumpled ball (d) neither of them
4. 4.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the same three liquids (b) how much of each liquid (c) the order of the layers (d) the order of pouring
5. 5.📘 What is water vapour? (a) a kind of smoke (b) salty water (c) water as a gas (d) tiny ice cubes
6. 6.True or false: a big bowl is not needed for the water cycle bowl. (a) True (b) False
7. 7.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
8. 8.True or false: air is denser than water. (a) True (b) False
9. 9.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of the layers is what we measure. (a) False (b) True
10. 10.True or false: food colour does not dissolve in water. (a) False (b) True
11. 11.⚖️ 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 three liquids (b) how much of each liquid (c) the order of pouring (d) the same glass
12. 12.True or false: a glass of water is not needed for the card-on-a-glass trick. (a) True (b) False
13. 13.🧺 Which of these is not needed for the density tower? (a) a balloon (b) honey (c) a spoon (d) water with food colour
14. 14.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) a paper clip (c) a battery cell (d) a pencil
15. 15.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) False (b) True
16. 16.True or false: a balloon is not needed for the water rainbow. (a) False (b) True
17. 17.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) sun or shade (b) how many drops form (c) the cling film cover
18. 18.🌊 What pushes a floating cork upward? (a) the air above (b) the tub (c) the cork itself (d) the water
19. 19.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) how big we blow it (c) the slope of the string (d) distance it travels
20. 20.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.💧 Which of these is melting? (a) drops on a cold glass (b) snow turning to water (c) wet hair drying (d) wet clothes drying
22. 22.🛟 How should you check if the sugar has dissolved? (a) poke it with a finger (b) smell it closely (c) look for leftover grains (d) taste it
23. 23.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is hot (b) juice likes plastic (c) air pushes it up (d) the straw is magnetic
24. 24.True or false: baking soda dissolves in water. (a) True (b) False
25. 25.🧺 Which of these is not needed for the water rainbow? (a) a balloon (b) a sunny window (c) bright sunlight (d) a sheet of white paper
26. 26.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it turns brighter (c) it floats away (d) the rainbow fades
27. 27.True or false: gas from the rocket goes forward. (a) False (b) True
28. 28.🔮 A cork floats in tap water. What happens in very salty water? (a) it turns white (b) it dissolves (c) it still floats (d) it sinks
29. 29.🧺 Which of these is needed for the card-on-a-glass trick? (a) a balloon (b) a battery cell (c) yeast (d) a stiff postcard
30. 30.🧺 Do we need a magnet for the balloon rocket? (a) not needed (b) needed
31. 31.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
32. 32.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same window”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🧺 Which of these is needed for the coloured flower experiment? (a) a few hours of waiting (b) a battery cell (c) a balloon (d) a mirror
34. 34.True or false: cold water is not needed for the dissolving test. (a) False (b) True
35. 35.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we change it (b) we measure it (c) we keep it the same
36. 36.🔍 Which is the odd one out? (a) a rubber eraser (b) a sugar cube (c) a piece of foil (d) a steel spoon
37. 37.📘 What does “dense” mean? (a) very hot (b) very colourful (c) heavy for its size (d) very thin
38. 38.🔮 Predict: the string slopes uphill. What happens? (a) it travels less far (b) it travels farther (c) it speeds up (d) it goes backward first
39. 39.🛟 Who should pour the warm water in the dissolving test? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
40. 40.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure

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