Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 839 · 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 is not needed for the dissolving test? (a) a clock or timer (b) a teaspoon (c) sugar (d) a magnet
2. 2.True or false: an ice cube is denser than water. (a) False (b) True
3. 3.🚀 In “push back, move forward”, which way does the rocket go? (a) goes forward (b) goes backward
4. 4.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it sinks at once (b) it turns to plastic (c) nothing ever happens (d) colour climbs up it
5. 5.🛟 Does an iron nail float or sink in water? (a) sinks (b) floats
6. 6.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) a balloon (c) a drinking straw (d) a mirror
7. 7.🧺 Do we need vinegar for the balloon rocket? (a) not needed (b) needed
8. 8.🛟 Why should the glass of water stand on a steady, flat place? (a) so it does not fall (b) so it gets hot (c) so it turns blue (d) so the Sun moves
9. 9.📘 What is water vapour? (a) salty water (b) water as a gas (c) tiny ice cubes (d) a kind of smoke
10. 10.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) run around the tub (c) play near a deep pond (d) leave water on the floor
11. 11.💧 Dip a flower stem into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
12. 12.⚖️ 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 change it (c) we measure it
13. 13.⚖️ 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 kind of sugar (c) time to dissolve
14. 14.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) time for colour to show (b) the amount of water (c) the length of the stem
15. 15.True or false: the balloon goes backward. (a) False (b) True
16. 16.🧺 Which of these is needed for the paper helicopter? (a) a mirror (b) a pencil (c) a battery cell (d) a magnet
17. 17.🧺 Do we need a battery cell for the float-or-sink test? (a) not needed (b) needed
18. 18.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a mirror (b) a fridge magnet (c) a sundial (d) a balloon rocket
19. 19.🧊 Why does an ice cube float on water? (a) ice is less dense (b) ice is very cold (c) ice is magnetic (d) water is sticky
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is kept the same. (a) True (b) False
21. 21.🥄 Which of these does not dissolve in water? (a) sand (b) baking soda (c) sugar (d) food colour
22. 22.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) the amount of clay (c) whether it floats
23. 23.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) a paper clip (c) a mirror (d) safety scissors
24. 24.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a magnet (c) a towel for spills (d) small test objects
25. 25.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) not at all (b) the same (c) slower (d) faster
26. 26.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) stare at the Sun (c) look at it through glass (d) look at it in a mirror
27. 27.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) a comb (c) warm water (d) a teaspoon
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) True (b) False
29. 29.True or false: honey is denser than water. (a) True (b) False
30. 30.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
31. 31.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
32. 32.True or false: a balloon is not needed for the density tower. (a) True (b) False
33. 33.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🔮 Predict: you blow the balloon up only a little. What happens? (a) it flies off the string (b) it turns into a kite (c) it goes less far (d) it goes much farther
35. 35.🥄 Which of these dissolves slower? (a) sugar stirred well (b) sugar in warm water (c) sugar left unstirred (d) powdered sugar
36. 36.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the kind of clay (b) whether it floats (c) the shape of the clay
37. 37.🧺 Do we need water with food colour for the density tower? (a) needed (b) not needed
38. 38.🛟 Which scissors should children use to cut the paper? (a) sharp kitchen shears (b) gardening shears (c) a paper cutter (d) safety scissors
39. 39.🧺 Which of these is not needed for the float-or-sink test? (a) small test objects (b) a tub of water (c) yeast (d) a results table
40. 40.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed

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