Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 465 · 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 a safe rule for the balloon rocket? (a) keep it away from faces (b) aim it at your friend (c) blow it till it bursts (d) put string round a neck
2. 2.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a magnet (c) a sunny window (d) yeast
3. 3.🎈 When does the balloon rocket stop? (a) when the air runs out (b) when it gets cold (c) when it turns blue (d) it never stops
4. 4.🚁 Why does the paper helicopter fall slowly? (a) air pushes on its blades (b) it has no weight (c) a magnet holds it (d) the floor pushes it
5. 5.True or false: honey is not needed for the density tower. (a) True (b) False
6. 6.True or false: yeast is needed for the balloon rocket. (a) True (b) False
7. 7.🧺 Which of these is not needed for the paper helicopter? (a) safety scissors (b) yeast (c) a ruler (d) a strip of paper
8. 8.🧺 Do we need turmeric powder for the water rainbow? (a) not needed (b) needed
9. 9.🧺 Which of these is needed for the float-or-sink test? (a) yeast (b) a towel for spills (c) a balloon (d) a battery cell
10. 10.🔍 Which is the odd one out? (a) a ball of clay (b) a coin (c) a steel spoon (d) a cork
11. 11.🧺 Do we need yeast for the paper helicopter? (a) not needed (b) needed
12. 12.🍯 Which of these is denser than water? (a) a ping-pong ball (b) cooking oil (c) air (d) honey
13. 13.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) whether it floats (b) the shape of the clay (c) the amount of clay (d) the kind of clay
14. 14.True or false: an empty capped bottle floats on water. (a) False (b) True
15. 15.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.💧 Which of these is condensation? (a) wet hair drying (b) ice becoming water (c) a puddle drying up (d) a misty bathroom mirror
17. 17.🔍 Which is the odd one out? (a) a glass marble (b) an ice cube (c) a pebble (d) a coin
18. 18.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) a magnet (c) two clear glasses (d) sugar
19. 19.True or false: the rocket goes backward. (a) True (b) False
20. 20.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) look at it in a mirror (c) stare at the Sun (d) never look at the Sun
21. 21.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) safety scissors (c) yeast (d) a strip of paper
22. 22.🍯 Why does honey sink to the bottom of the glass? (a) it is yellow (b) it is the stickiest (c) it is the densest (d) it is the coldest
23. 23.⚖️ 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 measure it (b) we change it (c) we keep it the same
24. 24.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the card stays on (d) the water turns to ice
25. 25.⚖️ 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 length of the blades (c) the kind of paper
26. 26.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) water with food colour (c) turmeric powder (d) a tall clear glass
27. 27.🔍 Which is the odd one out? (a) a pebble (b) a ping-pong ball (c) a ball of clay (d) an iron nail
28. 28.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) slower (b) faster (c) not at all (d) the same
29. 29.⚖️ 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 keep it the same (c) we change it
30. 30.🚁 Dropped from a raised hand, does a paper helicopter fall slowly or fast? (a) falls fast (b) falls slowly
31. 31.🍯 Is cooking oil denser or less dense than water? (a) denser than water (b) less dense than water
32. 32.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it sinks (c) it melts (d) it turns blue
33. 33.True or false: yeast is needed for the density tower. (a) False (b) True
34. 34.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is the one thing we change. (a) False (b) True
35. 35.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a fridge magnet (d) a drinking straw
36. 36.🚁 What does the paper helicopter do as it falls? (a) it spins round (b) it flies upward (c) it turns into a ball (d) it stays still in air
37. 37.☀️ What is white sunlight really made of? (a) tiny drops of water (b) only yellow light (c) tiny bits of dust (d) many colours mixed
38. 38.🔍 Which is the odd one out? (a) an ice cube (b) a ping-pong ball (c) a glass marble (d) a feather
39. 39.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) distance it travels (b) how big we blow it (c) the same tape (d) the slope of the string
40. 40.⚖️ 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

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