Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 452 · 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) very salty water (b) a glass marble (c) air (d) a coin
2. 2.🧺 Which of these is not needed for the balloon rocket? (a) a drinking straw (b) two chairs (c) a magnet (d) sticky tape
3. 3.🧺 Do we need yeast for the paper helicopter? (a) needed (b) not needed
4. 4.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is kept the same. (a) False (b) True
5. 5.🔍 Which is the odd one out? (a) a toy parachute (b) a steel spoon (c) a feather (d) an open sheet of paper
6. 6.🌼 How does coloured water reach the petals? (a) it rains on them (b) through the air (c) it is sprayed on (d) through tiny stem tubes
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is kept the same. (a) False (b) True
8. 8.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) it stays still (b) backward (c) forward (d) straight down
9. 9.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) green (c) blue (d) red
10. 10.True or false: a fridge magnet works by magnetism. (a) True (b) False
11. 11.True or false: a magnet is needed for the float-or-sink test. (a) False (b) True
12. 12.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the kind of sugar”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.🍯 Which of these is less dense than water? (a) a coin (b) honey (c) a cork (d) a pebble
14. 14.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same three liquids is kept the same. (a) False (b) True
15. 15.🧺 Which of these is needed for the density tower? (a) water with food colour (b) a balloon (c) a battery cell (d) turmeric powder
16. 16.🍯 Is very salty water denser or less dense than water? (a) less dense than water (b) denser than water
17. 17.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it melts (b) it sinks (c) it floats higher (d) it turns blue
18. 18.🛟 Who should trim the flower stem? (a) a toddler (b) anyone, without looking (c) a grown-up (d) a pet
19. 19.🧺 Which of these is not needed for the balloon rocket? (a) a battery cell (b) a long string (c) a drinking straw (d) two chairs
20. 20.True or false: a magnetic pin holder works by magnetism. (a) True (b) False
21. 21.🧺 Do we need a battery cell for the coloured flower experiment? (a) not needed (b) needed
22. 22.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) put string round a neck (c) blow it till it bursts (d) aim it at your friend
23. 23.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) a mirror (d) a sunny window
24. 24.True or false: air is denser than water. (a) False (b) True
25. 25.True or false: cotton wool is not needed for the dissolving test. (a) False (b) True
26. 26.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) lightning (b) rain (c) wind (d) sunshine
27. 27.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it in a mirror (d) look at it through glass
28. 28.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) bright sunlight (d) a magnet
29. 29.🧺 Do we need yeast for the float-or-sink test? (a) not needed (b) needed
30. 30.⚖️ 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) True (b) False
31. 31.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is what we measure. (a) True (b) False
32. 32.📘 What do we call light bending as it passes from air into water? (a) refraction (b) magnetism (c) reflection (d) evaporation
33. 33.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the same card (b) the same glass (c) the way we turn it (d) whether the card stays
34. 34.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
35. 35.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
36. 36.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) False (b) True
37. 37.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) a few hours of waiting (c) a mirror (d) yeast
38. 38.🍯 Which of these is less dense than water? (a) a glass marble (b) very salty water (c) honey (d) a ping-pong ball
39. 39.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) yeast (c) a balloon (d) two chairs
40. 40.🧺 Which of these is needed for the dissolving test? (a) a magnet (b) a teaspoon (c) a comb (d) cotton wool

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