Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 179 · 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.🔮 Predict: you add two more paper clips. How does it fall? (a) it floats up (b) faster (c) it stops in the air (d) slower
2. 2.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is kept the same. (a) False (b) True
3. 3.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a balloon (c) food colour (d) a few hours of waiting
4. 4.🔮 A cork floats in tap water. What happens in very salty water? (a) it turns white (b) it sinks (c) it dissolves (d) it still floats
5. 5.True or false: a pebble floats on water. (a) True (b) False
6. 6.🎈 What is the job of the straw on the string? (a) it blows air in (b) it makes it heavier (c) it guides the balloon (d) it holds water
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the amount of water (b) the amount of sugar (c) the water temperature (d) time to dissolve
8. 8.True or false: a towel for spills is not needed for the float-or-sink test. (a) True (b) False
9. 9.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a bicycle pump (d) a magnetic pin holder
10. 10.⚖️ 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 length of the stem (d) the amount of water
11. 11.🧺 Do we need a balloon for the float-or-sink test? (a) not needed (b) needed
12. 12.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) the size of the bowl (b) sun or shade (c) how many drops form (d) the cling film cover
13. 13.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we measure it (c) we change it
14. 14.🥤 Why does juice go up a drinking straw when you sip? (a) juice likes plastic (b) the straw is magnetic (c) air pushes it up (d) the straw is hot
15. 15.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a white flower (c) food colour (d) yeast
16. 16.🧺 Do we need a spoon for the density tower? (a) not needed (b) needed
17. 17.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) spilled oil is slippery (c) oil attracts magnets (d) oil turns into honey
18. 18.🧺 Do we need a tall clear glass for the density tower? (a) not needed (b) needed
19. 19.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is kept the same. (a) False (b) True
20. 20.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) the way we turn it (c) how full the glass is
21. 21.📘 What do we call water with sugar dissolved in it? (a) a solution (b) a rainbow (c) a magnet (d) a crystal
22. 22.⚖️ 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 length of the stem (b) the room it stands in (c) time for colour to show
23. 23.🧺 Which of these is not needed for the dissolving test? (a) warm water (b) sugar (c) honey (d) a clock or timer
24. 24.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the tub of water (b) whether it floats (c) the shape of the clay
25. 25.🛟 Which rule keeps you safe when working with sunlight? (a) look at it in a mirror (b) look at it through glass (c) stare at the Sun (d) never look at the Sun
26. 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the kind of sugar”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.True or false: a mirror is needed for the water rainbow. (a) False (b) True
28. 28.🔍 How can you get the salt back from salty water? (a) add more water (b) stir it more (c) let the water evaporate (d) keep it in a fridge
29. 29.🔍 Which is the odd one out? (a) an ice cube (b) a coin (c) a ping-pong ball (d) a cork
30. 30.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: how many drops form is the one thing we change. (a) True (b) False
31. 31.🥛 Does a suction hook work by air pressure or by magnetism? (a) air pressure (b) magnetism
32. 32.🔍 Which is the odd one out? (a) drops on a cold glass (b) making ice lollies (c) drops under a pot lid (d) a misty bathroom mirror
33. 33.True or false: dew on morning grass is melting. (a) True (b) False
34. 34.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the amount of water (b) the cling film cover (c) the time we wait (d) sun or shade
35. 35.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of pouring (b) how much of each liquid (c) the same three liquids (d) the order of the layers
36. 36.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) more friction, less far (b) it goes faster (c) less friction (d) no change at all
37. 37.🔍 Which is the odd one out? (a) a piece of chalk (b) a cotton thread (c) a strip of cloth (d) a steel spoon
38. 38.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is what we measure. (a) True (b) False
39. 39.🔍 Which is the odd one out? (a) water becoming ice (b) making ice lollies (c) wet hair drying (d) a pond icing over
40. 40.🥄 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve

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