Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 357 · 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.🧺 Do we need a tub of water for the float-or-sink test? (a) not needed (b) needed
2. 2.True or false: a mirror is not needed for the balloon rocket. (a) True (b) False
3. 3.🧺 Which of these is needed for the paper helicopter? (a) a battery cell (b) a magnet (c) a strip of paper (d) a mirror
4. 4.🔍 Which is the odd one out? (a) food colour (b) chalk powder (c) glucose powder (d) sugar
5. 5.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) it goes faster (b) less friction (c) more friction, less far (d) no change at all
6. 6.True or false: a cork is denser than water. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) a piece of thermocol (b) a coin (c) a steel spoon (d) a metal key
8. 8.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) warm water (b) a clock or timer (c) a teaspoon (d) cotton wool
9. 9.True or false: a cork floats on water. (a) True (b) False
10. 10.🍯 Why does honey sink to the bottom of the glass? (a) it is the coldest (b) it is yellow (c) it is the stickiest (d) it is the densest
11. 11.🌼 How does coloured water reach the petals? (a) it is sprayed on (b) through the air (c) through tiny stem tubes (d) it rains on them
12. 12.💧 Which of these is freezing? (a) snow turning to water (b) ice becoming water (c) water becoming ice (d) wet clothes drying
13. 13.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) the cap is sticky (c) water is hiding there (d) the bottle is magnetic
14. 14.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) prisms (b) balloons (c) clouds (d) magnets
15. 15.🔍 Which is the odd one out? (a) making ice lollies (b) a pond icing over (c) ice becoming water (d) water becoming ice
16. 16.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a balloon (c) a ruler (d) a paper clip
17. 17.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) a paper cutter (c) safety scissors (d) sharp kitchen shears
18. 18.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it gets too heavy (c) it can pop loudly (d) it turns into a kite
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the way we turn it (b) the same card (c) whether the card stays (d) the same glass
20. 20.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is kept the same. (a) True (b) False
21. 21.🔍 Which is the odd one out? (a) a steel spoon (b) a feather (c) a coin (d) a glass marble
22. 22.🍯 Is air denser or less dense than water? (a) denser than water (b) less dense than water
23. 23.⚖️ 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 order of the layers (b) the same glass (c) the same three liquids (d) the order of pouring
24. 24.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the petals turn red (c) the stem turns blue (d) no colour change
25. 25.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is what we measure. (a) False (b) True
26. 26.🥄 Which of these dissolves in water? (a) cooking oil (b) table salt (c) chalk powder (d) sawdust
27. 27.🚁 What does the paper helicopter do as it falls? (a) it spins round (b) it flies upward (c) it turns into a ball (d) it stays still in air
28. 28.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes less far (b) it goes much farther (c) it turns into a kite (d) it flies off the string
29. 29.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) honey (c) a tall clear glass (d) a magnet
30. 30.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) distance it travels (b) how big we blow it (c) the slope of the string
31. 31.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) a balloon (c) water (d) sunlight
32. 32.True or false: the swimmer goes forward. (a) False (b) True
33. 33.🔍 Which is the odd one out? (a) cooking oil (b) small pebbles (c) chalk powder (d) food colour
34. 34.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is what we measure. (a) False (b) True
35. 35.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🛟 Does a feather float or sink in water? (a) sinks (b) floats
37. 37.🧺 Which of these is needed for the coloured flower experiment? (a) a magnet (b) yeast (c) a few hours of waiting (d) a battery cell
38. 38.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) the water turns solid (c) some stays undissolved (d) the sugar turns to salt
39. 39.True or false: a balloon is not needed for the float-or-sink test. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) a piece of thermocol (b) a glass marble (c) a dry leaf (d) a ping-pong ball

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