Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 967 · 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) making ice lollies (b) water becoming ice (c) drops under a pot lid (d) a pond icing over
2. 2.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the petals turn red (c) no colour change (d) the stem turns blue
3. 3.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a battery cell (c) bright sunlight (d) a clear glass of water
4. 4.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of the layers (b) the order of pouring (c) the same glass
5. 5.True or false: a battery cell is needed for the balloon rocket. (a) True (b) False
6. 6.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a small rainbow (c) a magnet (d) a shadow of ice
7. 7.True or false: air is less dense than water. (a) False (b) True
8. 8.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is what we measure. (a) False (b) True
9. 9.True or false: chalk powder does not dissolve in water. (a) False (b) True
10. 10.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) bright sunlight (c) a sheet of white paper (d) yeast
11. 11.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the amount of colour (b) the length of the stem (c) time for colour to show
12. 12.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a magnet (b) a glass of water (c) a towel (d) a stiff postcard
13. 13.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of pouring (b) the order of the layers (c) the same three liquids
14. 14.🔍 Which is the odd one out? (a) a feather (b) an empty capped bottle (c) a piece of thermocol (d) a metal key
15. 15.True or false: a coin is less dense than water. (a) True (b) False
16. 16.True or false: a battery cell is needed for the card-on-a-glass trick. (a) True (b) False
17. 17.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the person dropping (b) the drop height (c) time to reach the floor (d) the length of the blades
18. 18.🧺 Do we need a mirror for the water cycle bowl? (a) needed (b) not needed
19. 19.🧺 Which of these is not needed for the density tower? (a) cooking oil (b) a tall clear glass (c) honey (d) turmeric powder
20. 20.True or false: food colour is not needed for the coloured flower experiment. (a) False (b) True
21. 21.📘 What does “dense” mean? (a) very hot (b) very colourful (c) very thin (d) heavy for its size
22. 22.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) sun or shade (b) the amount of water (c) how many drops form
23. 23.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to win a prize (c) to splash everyone (d) to keep children safe
24. 24.🔍 Which is the odd one out? (a) making ice lollies (b) snow turning to water (c) water becoming ice (d) a pond icing over
25. 25.True or false: wet clothes drying is freezing. (a) True (b) False
26. 26.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.🍯 Is a coin denser or less dense than water? (a) denser than water (b) less dense than water
28. 28.True or false: a stone falls slowly through the air. (a) False (b) True
29. 29.⚖️ 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 kind of flower (b) the length of the stem (c) the room it stands in (d) the amount of colour
30. 30.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) no change at all (b) less friction (c) it goes faster (d) more friction, less far
31. 31.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) needed (b) not needed
32. 32.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we measure it (b) we change it (c) we keep it the same
33. 33.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is the one thing we change. (a) True (b) False
34. 34.🔮 Predict: you blow up a balloon. What fills it? (a) water (b) smoke (c) sand (d) air
35. 35.🥛 Why is it best to fill the glass right to the top? (a) little air left inside (b) water is heavier (c) it looks nicer (d) the card gets wet
36. 36.🥛 Which of these works by magnetism? (a) a vacuum cleaner (b) a suction hook (c) a drinking straw (d) a fridge magnet
37. 37.🍯 Which of these is denser than water? (a) a cork (b) an ice cube (c) a ping-pong ball (d) a coin
38. 38.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to catch any spills (d) to grow plants
39. 39.🧺 Which of these is not needed for the water rainbow? (a) bright sunlight (b) a sunny window (c) a sheet of white paper (d) turmeric powder
40. 40.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) how big we blow it (c) the slope of the string (d) distance it travels

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