Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 979 · 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 a bowl in the sun make more drops than a bowl in the shade? True or false: the time we wait is kept the same. (a) False (b) True
2. 2.🧺 Do we need a magnet for the dissolving test? (a) not needed (b) needed
3. 3.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) two chairs (c) vinegar (d) sticky tape
4. 4.🛟 What should you do with popped balloon pieces? (a) throw them away safely (b) keep them in your mouth (c) give them to a baby (d) chew them
5. 5.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
6. 6.🥛 Does a magnetic chess set work by air pressure or by magnetism? (a) magnetism (b) air pressure
7. 7.🧺 Do we need yeast for the balloon rocket? (a) needed (b) not needed
8. 8.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) the same card (b) how full the glass is (c) whether the card stays (d) the same glass
9. 9.⚖️ 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) True (b) False
10. 10.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is kept the same. (a) True (b) False
11. 11.True or false: sawdust does not dissolve in water. (a) True (b) False
12. 12.🌈 How many colours do we name in a rainbow (VIBGYOR)?
13. 13.🧺 Do we need a battery cell for the density tower? (a) not needed (b) needed
14. 14.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) the water increases (c) some water evaporates (d) it turns to ice
15. 15.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) the rainbow fades (d) it turns brighter
16. 16.🔮 A big log and a small pebble go into a pond. Which one floats? (a) neither of them (b) the big log (c) both of them (d) the small pebble
17. 17.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a drinking straw (c) a magnetic chess set (d) a fridge magnet
18. 18.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) melting (c) capillary action (d) magnetism
19. 19.True or false: water becoming ice is freezing. (a) True (b) False
20. 20.⚖️ 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 kind of flower (c) the amount of water (d) the room it stands in
21. 21.True or false: a few hours of waiting is needed for the coloured flower experiment. (a) False (b) True
22. 22.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
23. 23.💧 Which change is this: butter going runny? (a) evaporation (b) condensation (c) melting (d) freezing
24. 24.🔍 Which is the odd one out? (a) a piece of chalk (b) a steel spoon (c) a cotton thread (d) a flower stem
25. 25.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a stiff postcard (c) a glass of water (d) a magnet
26. 26.💧 Which of these lets water climb up it? (a) a plastic ruler (b) a glass marble (c) a cotton thread (d) a rubber eraser
27. 27.🍯 Which of these is less dense than water? (a) honey (b) very salty water (c) air (d) a coin
28. 28.🔍 Which is the odd one out? (a) a paper helicopter (b) a fluff of cotton (c) a crumpled paper ball (d) an open sheet of paper
29. 29.True or false: a cotton thread does not let water climb. (a) False (b) True
30. 30.True or false: a teaspoon is not needed for the dissolving test. (a) False (b) True
31. 31.True or false: a battery cell is needed for the balloon rocket. (a) True (b) False
32. 32.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.🛟 Does a steel spoon float or sink in water? (a) sinks (b) floats
34. 34.🔍 Which is the odd one out? (a) drops on a cold glass (b) water becoming ice (c) drops under a pot lid (d) dew on morning grass
35. 35.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🔍 Sand is stirred into water. What do you see after a while? (a) it floats up (b) it turns blue (c) it settles at the bottom (d) it dissolves
37. 37.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) forward (b) it stays still (c) backward (d) straight down
38. 38.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a balloon (b) sugar (c) a teaspoon (d) two clear glasses
39. 39.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) turmeric powder (c) a towel (d) a stiff postcard
40. 40.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed

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