Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 762 · 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.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: whether the card stays is kept the same. (a) True (b) False
2. 2.⚖️ 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 keep it the same (b) we change it (c) we measure it
3. 3.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we keep it the same (b) we measure it (c) we change it
4. 4.🧺 Which of these is not needed for the balloon rocket? (a) a long string (b) a drinking straw (c) a balloon (d) a battery cell
5. 5.🥄 Which of these dissolves in water? (a) sawdust (b) cooking oil (c) sand (d) sugar
6. 6.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a magnet (c) food colour (d) a white flower
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same glass is the one thing we change. (a) True (b) False
8. 8.🧺 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) yeast
9. 9.🧺 Which of these is needed for the density tower? (a) a magnet (b) a balloon (c) cooking oil (d) yeast
10. 10.True or false: a ping-pong ball floats on water. (a) False (b) True
11. 11.🧺 Do we need a white flower for the coloured flower experiment? (a) not needed (b) needed
12. 12.🧺 Do we need two clear glasses for the dissolving test? (a) not needed (b) needed
13. 13.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) nothing ever happens (c) colour climbs up it (d) it turns to plastic
14. 14.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
15. 15.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is kept the same. (a) False (b) True
16. 16.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the kind of sugar (b) the stirring (c) the water temperature (d) the amount of sugar
17. 17.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to splash everyone (c) to keep children safe (d) to hide the corks
18. 18.True or false: a balloon is needed for the balloon rocket. (a) False (b) True
19. 19.True or false: a clock or timer is not needed for the dissolving test. (a) False (b) True
20. 20.True or false: a mirror is needed for the card-on-a-glass trick. (a) True (b) False
21. 21.🛟 Does an iron nail float or sink in water? (a) sinks (b) floats
22. 22.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is what we measure. (a) True (b) False
23. 23.True or false: the rocket goes forward. (a) True (b) False
24. 24.🧺 Do we need a drinking straw for the balloon rocket? (a) not needed (b) needed
25. 25.🧺 Do we need a tub of water for the float-or-sink test? (a) not needed (b) needed
26. 26.🎈 What is the job of the straw on the string? (a) it makes it heavier (b) it guides the balloon (c) it blows air in (d) it holds water
27. 27.True or false: a balloon is not needed for the float-or-sink test. (a) True (b) False
28. 28.🥛 Does a magnetic pin holder work by air pressure or by magnetism? (a) magnetism (b) air pressure
29. 29.⚖️ 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 glass (b) how much of each liquid (c) the order of the layers (d) the order of pouring
30. 30.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a battery cell (b) ice cubes (c) sunlight (d) a big bowl
31. 31.True or false: yeast is needed for the water rainbow. (a) False (b) True
32. 32.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
33. 33.🚁 Dropped from a raised hand, does a glass marble fall slowly or fast? (a) falls slowly (b) falls fast
34. 34.🚀 In “push back, move forward”, which way does air from the balloon go? (a) goes forward (b) goes backward
35. 35.True or false: a ping-pong ball sinks in water. (a) False (b) True
36. 36.🥄 Why does sugar dissolve faster in warm water? (a) sugar likes the dark (b) warm water is thicker (c) particles move faster (d) cold water is wet
37. 37.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) time for colour to show (b) the length of the stem (c) the amount of colour (d) the amount of water
38. 38.True or false: drops on a cold glass is freezing. (a) False (b) True
39. 39.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the amount of clay (b) whether it floats (c) the kind of clay (d) the shape of the clay
40. 40.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they turn to honey (c) they mix for ever (d) they separate again

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