Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 697 · 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.🔍 Which is the odd one out? (a) table salt (b) food colour (c) sugar (d) cooking oil
2. 2.🥄 Which of these does not dissolve in water? (a) sugar (b) small pebbles (c) table salt (d) baking soda
3. 3.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) water with food colour (c) cooking oil (d) yeast
5. 5.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) True (b) False
6. 6.🧺 Do we need a magnet for the card-on-a-glass trick? (a) needed (b) not needed
7. 7.🧺 Do we need sticky tape for the balloon rocket? (a) needed (b) not needed
8. 8.🍯 Which of these is denser than water? (a) a glass marble (b) a ping-pong ball (c) air (d) a cork
9. 9.True or false: sugar does not dissolve in water. (a) True (b) False
10. 10.True or false: sugar in warm water dissolves faster. (a) False (b) True
11. 11.True or false: a misty bathroom mirror is melting. (a) False (b) True
12. 12.🧺 Do we need a balloon for the float-or-sink test? (a) needed (b) not needed
13. 13.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it gets hot (c) so the Sun moves (d) so it does not fall
14. 14.🛟 What should you do with wet floors after the experiment? (a) wipe them dry (b) leave them wet (c) slide on them (d) pour more water
15. 15.🧺 Which of these is not needed for the water cycle bowl? (a) a big bowl (b) water (c) cling film (d) turmeric powder
16. 16.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
17. 17.☀️ What is white sunlight really made of? (a) tiny bits of dust (b) tiny drops of water (c) only yellow light (d) many colours mixed
18. 18.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is kept the same. (a) False (b) True
19. 19.💧 Which of these is melting? (a) drops on a cold glass (b) drops under a pot lid (c) wet hair drying (d) butter going runny
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it dissolves (c) it can float (d) it sinks faster
22. 22.True or false: a pebble floats on water. (a) False (b) True
23. 23.🛟 Who should trim the flower stem? (a) a grown-up (b) anyone, without looking (c) a pet (d) a toddler
24. 24.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to make it fall slower (b) to stop the spinning (c) to weigh down the bottom (d) to make it magnetic
25. 25.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
26. 26.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the big log (b) both of them (c) neither of them (d) the small pebble
27. 27.🍯 Which of these is less dense than water? (a) very salty water (b) air (c) honey (d) a coin
28. 28.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the length of the stem (b) the kind of flower (c) time for colour to show (d) the amount of colour
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 order of pouring (b) how much of each liquid (c) the same glass (d) the order of the layers
30. 30.🔍 Which is the odd one out? (a) a ping-pong ball (b) a glass marble (c) a cork (d) an ice cube
31. 31.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the drop height (b) the kind of paper (c) the length of the blades (d) the person dropping
32. 32.⚖️ 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) False (b) True
33. 33.📘 What is it called when water climbs up thin tubes or paper by itself? (a) melting (b) capillary action (c) evaporation (d) magnetism
34. 34.🛟 Does a glass marble float or sink in water? (a) floats (b) sinks
35. 35.🧺 Which of these is needed for the balloon rocket? (a) a battery cell (b) a magnet (c) a drinking straw (d) a mirror
36. 36.True or false: a white flower is not needed for the coloured flower experiment. (a) True (b) False
37. 37.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the petals turn bluish (c) the stem turns to ice (d) the water turns green
38. 38.🥄 Which of these dissolves in water? (a) sawdust (b) food colour (c) sand (d) chalk powder
39. 39.True or false: a balloon is not needed for the card-on-a-glass trick. (a) True (b) False
40. 40.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle

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