Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 241 · 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.True or false: bright sunlight is not needed for the water rainbow. (a) False (b) True
2. 2.🥄 Does sugar in warm water dissolve faster or slower? (a) faster (b) slower
3. 3.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a small cup (b) ice cubes (c) water (d) a mirror
4. 4.True or false: a mirror is not needed for the float-or-sink test. (a) False (b) True
5. 5.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
6. 6.⚖️ 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) how many drops form (c) the size of the bowl
7. 7.True or false: a pencil is needed for the paper helicopter. (a) False (b) True
8. 8.🔮 A big log and a small pebble go into a pond. Which one floats? (a) both of them (b) the small pebble (c) neither of them (d) the big log
9. 9.True or false: water with food colour is needed for the density tower. (a) True (b) False
10. 10.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) time to reach the floor (b) the person dropping (c) the length of the blades
11. 11.🛟 What should you do with popped balloon pieces? (a) throw them away safely (b) give them to a baby (c) chew them (d) keep them in your mouth
12. 12.🔍 You drop a coin into a tub of water. What do you see? (a) it dissolves (b) it sinks (c) it bounces up (d) it floats
13. 13.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) whether it floats (b) the amount of clay (c) the shape of the clay (d) the tub of water
14. 14.📘 What does “dense” mean? (a) heavy for its size (b) very colourful (c) very thin (d) very hot
15. 15.🌈 How many colours do we name in a rainbow (VIBGYOR)?
16. 16.True or false: a fridge magnet works by air pressure. (a) False (b) True
17. 17.🧺 Which of these is needed for the float-or-sink test? (a) a magnet (b) a battery cell (c) small test objects (d) turmeric powder
18. 18.True or false: turmeric powder is needed for the balloon rocket. (a) False (b) True
19. 19.🔮 Why do we try the card trick over a sink or a bucket? (a) to cool the glass (b) to catch any spills (c) to grow plants (d) to make it rain
20. 20.True or false: cooking oil dissolves in water. (a) False (b) True
21. 21.🥄 Why does sugar dissolve faster in warm water? (a) particles move faster (b) cold water is wet (c) sugar likes the dark (d) warm water is thicker
22. 22.🧺 Which of these is not needed for the water rainbow? (a) a balloon (b) a sunny window (c) bright sunlight (d) a sheet of white paper
23. 23.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) a balloon (c) cooking oil (d) water with food colour
24. 24.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to make it magnetic (b) to stop the spinning (c) to weigh down the bottom (d) to make it fall slower
25. 25.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is kept the same. (a) False (b) True
26. 26.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) water is hiding there (b) the bottle is magnetic (c) the cap is sticky (d) air inside pushes back
28. 28.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the water temperature (b) the amount of sugar (c) time to dissolve
29. 29.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) the sugar cube (b) powdered sugar (c) neither of them (d) both the same
30. 30.⚖️ 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 way we turn it (b) whether the card stays (c) the same glass (d) how full the glass is
31. 31.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they become solid (b) they mix for ever (c) they separate again (d) they turn to honey
32. 32.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
33. 33.🧺 Which of these is needed for the paper helicopter? (a) turmeric powder (b) safety scissors (c) a battery cell (d) yeast
34. 34.🚁 Which of these falls slowly through the air? (a) a coin (b) a glass marble (c) a steel spoon (d) an open sheet of paper
35. 35.💧 Which of these lets water climb up it? (a) a steel spoon (b) a sugar cube (c) a glass marble (d) a piece of foil
36. 36.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals like colour (c) the stem is hot (d) petals lose water to air
37. 37.🌈 In VIBGYOR, what number colour is green?
38. 38.True or false: two clear glasses is not needed for the dissolving test. (a) False (b) True
39. 39.🔮 A cork floats in tap water. What happens in very salty water? (a) it still floats (b) it turns white (c) it sinks (d) it dissolves
40. 40.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) sand (c) water (d) smoke

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