Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 66 · 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 of these dissolves in water? (a) baking soda (b) small pebbles (c) sand (d) cooking oil
2. 2.True or false: water from the oars goes backward. (a) False (b) True
3. 3.🧺 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) food colour (d) turmeric powder
4. 4.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of the layers”? (a) we keep it the same (b) we change it (c) we measure it
5. 5.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) water splits the light (c) the water is coloured (d) the glass is painted
6. 6.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) sugar in icy water (c) a big sugar cube (d) sugar in warm water
7. 7.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) brightness of rainbow (c) the same window
8. 8.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a mirror (c) a paper clip (d) safety scissors
9. 9.True or false: cotton wool is not needed for the dissolving test. (a) True (b) False
10. 10.🧺 Which of these is not needed for the density tower? (a) a spoon (b) cooking oil (c) a magnet (d) a tall clear glass
11. 11.🔍 Which is the odd one out? (a) sawdust (b) sugar (c) chalk powder (d) sand
12. 12.🍯 Which of these is less dense than water? (a) a pebble (b) a ping-pong ball (c) a coin (d) honey
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 measure it (b) we change it (c) we keep it the same
14. 14.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the amount of sugar (b) the stirring (c) the amount of water (d) time to dissolve
15. 15.💧 Which of these does not let water climb? (a) a cotton thread (b) a flower stem (c) a sugar cube (d) a steel spoon
16. 16.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) a roof edge (c) from your raised hand (d) a high window ledge
17. 17.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed
18. 18.🛟 Why should you not over-blow the balloon? (a) it changes colour (b) it gets too heavy (c) it can pop loudly (d) it turns into a kite
19. 19.⚖️ 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) time for colour to show (b) the amount of colour (c) the length of the stem (d) the kind of flower
20. 20.True or false: turmeric powder is not needed for the water cycle bowl. (a) True (b) False
21. 21.🔮 Predict: the string slopes uphill. What happens? (a) it travels farther (b) it travels less far (c) it goes backward first (d) it speeds up
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the drop height is what we measure. (a) False (b) True
23. 23.🧺 Which of these is needed for the coloured flower experiment? (a) a balloon (b) a mirror (c) a white flower (d) a battery cell
24. 24.🛟 How should you check if the sugar has dissolved? (a) smell it closely (b) taste it (c) poke it with a finger (d) look for leftover grains
25. 25.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is the one thing we change. (a) False (b) True
26. 26.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
27. 27.🍯 Is a ping-pong ball denser or less dense than water? (a) denser than water (b) less dense than water
28. 28.🌦️ To see a rainbow in the sky, where must the Sun be? (a) behind you (b) in front of you (c) straight above you (d) under the ground
29. 29.🔍 Which is the odd one out? (a) water becoming ice (b) making ice lollies (c) a pond icing over (d) dew on morning grass
30. 30.🛟 What should you do after handling food colour? (a) wash your hands (b) lick your fingers (c) wipe them on walls (d) rub your eyes
31. 31.⚖️ 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 kind of flower (b) time for colour to show (c) the length of the stem
32. 32.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a mirror (c) a towel (d) a stiff postcard
33. 33.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) never look at the Sun (c) stare at the Sun (d) look at it in a mirror
34. 34.🧺 Which of these is not needed for the dissolving test? (a) cotton wool (b) a clock or timer (c) warm water (d) sugar
35. 35.🔍 Which is the odd one out? (a) sand (b) baking soda (c) food colour (d) table salt
36. 36.🔍 Which is the odd one out? (a) a feather (b) a coin (c) a glass marble (d) an iron nail
37. 37.🧺 Do we need sticky tape for the balloon rocket? (a) needed (b) not needed
38. 38.⚖️ 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
39. 39.🧺 Which of these is needed for the paper helicopter? (a) yeast (b) a mirror (c) turmeric powder (d) a ruler
40. 40.⚖️ 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 same card (b) the way we turn it (c) how full the glass is (d) the same glass

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