Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 888 · 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.True or false: turmeric powder is needed for the card-on-a-glass trick. (a) True (b) False
2. 2.True or false: a mirror is needed for the float-or-sink test. (a) True (b) False
3. 3.🫗 Why does cooking oil float on top of water? (a) oil is heavier (b) oil is hot (c) oil is sticky (d) oil is less dense
4. 4.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it in a mirror (c) look at it through glass (d) stare at the Sun
5. 5.🔍 Which is the odd one out? (a) a coin (b) an ice cube (c) a pebble (d) honey
6. 6.True or false: yeast is not needed for the balloon rocket. (a) False (b) True
7. 7.🧺 Which of these is needed for the density tower? (a) a balloon (b) a tall clear glass (c) a battery cell (d) yeast
8. 8.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the kind of flower is what we measure. (a) False (b) True
9. 9.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
10. 10.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) some water evaporates (b) it turns to ice (c) the water increases (d) it turns to salt
11. 11.🧺 Do we need a mirror for the coloured flower experiment? (a) not needed (b) needed
12. 12.🧺 Do we need turmeric powder for the paper helicopter? (a) needed (b) not needed
13. 13.🛟 Does a dry leaf float or sink in water? (a) floats (b) sinks
14. 14.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a magnet (b) a small cup (c) cling film (d) ice cubes
15. 15.True or false: vinegar is not needed for the balloon rocket. (a) False (b) True
16. 16.True or false: a coin falls fast through the air. (a) True (b) False
17. 17.🛟 Which of these floats on water? (a) a pebble (b) an iron nail (c) a coin (d) a feather
18. 18.🧺 Do we need a clear glass of water for the water rainbow? (a) not needed (b) needed
19. 19.⚖️ 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 measure it (b) we change it (c) we keep it the same
20. 20.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the kind of sugar”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the slope of the string (b) the same string (c) how big we blow it (d) the same straw
22. 22.📘 What do we call water with sugar dissolved in it? (a) a solution (b) a crystal (c) a magnet (d) a rainbow
23. 23.🔮 Predict: you blow the balloon up only a little. What happens? (a) it turns into a kite (b) it flies off the string (c) it goes much farther (d) it goes less far
24. 24.🛟 Why should the glass of water stand on a steady, flat place? (a) so the Sun moves (b) so it turns blue (c) so it does not fall (d) so it gets hot
25. 25.🚢 Why can a heavy steel ship float on the sea? (a) it has a magnet (b) steel is very light (c) its hollow shape (d) sea water is warm
26. 26.🧺 Do we need two clear glasses for the dissolving test? (a) not needed (b) needed
27. 27.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) a sunny window (c) bright sunlight (d) a clear glass of water
28. 28.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) sawdust (d) small pebbles
29. 29.🍯 Is very salty water denser or less dense than water? (a) less dense than water (b) denser than water
30. 30.🔍 Which is the odd one out? (a) a dry leaf (b) a coin (c) a feather (d) a cork
31. 31.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) turmeric powder (d) a stiff postcard
32. 32.🛟 Which of these floats on water? (a) a metal key (b) a piece of thermocol (c) a pebble (d) a ball of clay
33. 33.🚁 Dropped from a raised hand, does a paper helicopter fall slowly or fast? (a) falls fast (b) falls slowly
34. 34.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a glass of water (c) a towel (d) a stiff postcard
35. 35.True or false: air is denser than water. (a) False (b) True
36. 36.True or false: yeast is not needed for the density tower. (a) True (b) False
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “how full the glass is”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.🛟 Does an ice cube float or sink in water? (a) sinks (b) floats
39. 39.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) not needed (b) needed
40. 40.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) False (b) True

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