Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 960 · 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 shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.True or false: a steel spoon lets water climb up it. (a) True (b) False
3. 3.📘 What pulls the paper helicopter down to the floor? (a) the wind (b) air pressure (c) magnetism (d) gravity
4. 4.True or false: a battery cell is not needed for the water cycle bowl. (a) True (b) False
5. 5.⚖️ 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
6. 6.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it sinks (b) it melts (c) it turns blue (d) it floats higher
7. 7.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a small cup (b) water (c) a big bowl (d) a magnet
8. 8.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a glass of water (c) a white flower (d) a magnet
9. 9.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) table salt (d) sand
10. 10.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) True (b) False
11. 11.True or false: a plastic ruler lets water climb up it. (a) True (b) False
12. 12.🛟 Which of these sinks in water? (a) a pebble (b) a ping-pong ball (c) a cork (d) an ice-cream stick
13. 13.🔍 Sand is stirred into water. What do you see after a while? (a) it turns blue (b) it dissolves (c) it settles at the bottom (d) it floats up
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the length of the stem (b) the amount of water (c) the kind of flower (d) time for colour to show
15. 15.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a clock or timer (b) cold water (c) honey (d) a teaspoon
16. 16.🔍 You drop a coin into a tub of water. What do you see? (a) it dissolves (b) it bounces up (c) it floats (d) it sinks
17. 17.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
18. 18.🧺 Do we need water for the water cycle bowl? (a) not needed (b) needed
19. 19.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a balloon (c) a few hours of waiting (d) food colour
20. 20.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they turn to honey (b) they become solid (c) they mix for ever (d) they separate again
21. 21.🧺 Which of these is needed for the density tower? (a) a battery cell (b) a mirror (c) a balloon (d) a tall clear glass
22. 22.🧺 Which of these is not needed for the paper helicopter? (a) a ruler (b) a mirror (c) safety scissors (d) a pencil
23. 23.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the sugar turns to salt (b) some stays undissolved (c) the water turns solid (d) all of it dissolves
24. 24.True or false: a compass needle works by air pressure. (a) True (b) False
25. 25.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
26. 26.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) a few ice cubes (c) more plain water (d) lots of salt stirred in
27. 27.🧺 Do we need food colour for the coloured flower experiment? (a) needed (b) not needed
28. 28.🛟 How should you check if the sugar has dissolved? (a) taste it (b) look for leftover grains (c) poke it with a finger (d) smell it closely
29. 29.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it will not break (d) it is magnetic
30. 30.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the water turns green (c) the stem turns to ice (d) the petals turn bluish
31. 31.True or false: a fridge magnet works by air pressure. (a) False (b) True
32. 32.🧺 Which of these is needed for the balloon rocket? (a) a magnet (b) yeast (c) a mirror (d) a long string
33. 33.True or false: sawdust does not dissolve in water. (a) True (b) False
34. 34.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a battery cell (c) a sunny window (d) bright sunlight
35. 35.💧 Which change is this: a misty bathroom mirror? (a) evaporation (b) melting (c) condensation (d) freezing
36. 36.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “how many drops form”? (a) we measure it (b) we keep it the same (c) we change it
37. 37.🌈 In VIBGYOR, what number colour is red?
38. 38.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) the cap is sticky (d) air inside pushes back
39. 39.🍯 Which of these is less dense than water? (a) a ping-pong ball (b) a pebble (c) a glass marble (d) a coin
40. 40.🥄 Does sugar left unstirred dissolve faster or slower? (a) slower (b) faster

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