Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 941 · 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.🧊 Why does an ice cube float on water? (a) ice is less dense (b) ice is very cold (c) water is sticky (d) ice is magnetic
2. 2.🎈 When does the balloon rocket stop? (a) when the air runs out (b) it never stops (c) when it turns blue (d) when it gets cold
3. 3.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
4. 4.🌼 How does coloured water reach the petals? (a) through tiny stem tubes (b) through the air (c) it is sprayed on (d) it rains on them
5. 5.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card flies away (c) the card stays on (d) the glass breaks
6. 6.⚖️ 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
7. 7.🛟 Does a steel spoon float or sink in water? (a) sinks (b) floats
8. 8.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🧺 Which of these is needed for the paper helicopter? (a) a mirror (b) yeast (c) a battery cell (d) a strip of paper
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.True or false: a pebble is less dense than water. (a) True (b) False
12. 12.🧺 Do we need a long string for the balloon rocket? (a) needed (b) not needed
13. 13.True or false: a battery cell is needed for the water cycle bowl. (a) True (b) False
14. 14.🚁 Which of these falls fast through the air? (a) a paper helicopter (b) a feather (c) a coin (d) an open sheet of paper
15. 15.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we keep it the same (b) we measure it (c) we change it
16. 16.⚖️ 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) whether the card stays (b) the same glass (c) the same card (d) how full the glass is
17. 17.🛟 Why should we wipe up spilled oil at once? (a) oil turns into honey (b) oil makes it rain (c) spilled oil is slippery (d) oil attracts magnets
18. 18.True or false: a piece of thermocol sinks in water. (a) True (b) False
19. 19.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) water is hiding there (c) air inside pushes back (d) the cap is sticky
20. 20.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is kept the same. (a) True (b) False
21. 21.🌈 In VIBGYOR, what number colour is yellow?
22. 22.🔍 Which is the odd one out? (a) a flower stem (b) a paper towel (c) a strip of cloth (d) a plastic ruler
23. 23.True or false: a toy parachute falls fast through the air. (a) False (b) True
24. 24.🚀 In “push back, move forward”, which way does water a swimmer pushes go? (a) goes backward (b) goes forward
25. 25.🛟 Which is a safe rule for the balloon rocket? (a) blow it till it bursts (b) aim it at your friend (c) keep it away from faces (d) put string round a neck
26. 26.🚀 Which of these goes forward? (a) water a swimmer pushes (b) gas from the rocket (c) the rocket (d) water from the oars
27. 27.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) near a plug point (c) over a sink or bucket (d) over a laptop
28. 28.True or false: a results table is not needed for the float-or-sink test. (a) False (b) True
29. 29.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.🧺 Do we need a magnet for the density tower? (a) not needed (b) needed
31. 31.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the paper clip (b) the drop height (c) the length of the blades (d) time to reach the floor
32. 32.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) under the honey (c) on top of the oil (d) in the honey layer
33. 33.True or false: sugar stirred well dissolves faster. (a) True (b) False
34. 34.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
35. 35.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) snow falling (c) a small rainbow (d) a magnet
36. 36.True or false: an open sheet of paper falls slowly through the air. (a) False (b) True
37. 37.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the amount of water (c) the water temperature
38. 38.🥛 Does a medicine dropper work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.True or false: a battery cell is needed for the paper helicopter. (a) True (b) False
40. 40.🚀 In “push back, move forward”, which way does the balloon go? (a) goes backward (b) goes forward

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids