Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 828 · 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 safe way to do the float-or-sink test? (a) leave water on the floor (b) wipe up spills at once (c) run around the tub (d) play near a deep pond
2. 2.🚁 Why does the paper helicopter fall slowly? (a) air pushes on its blades (b) the floor pushes it (c) it has no weight (d) a magnet holds it
3. 3.📘 What do we call water with sugar dissolved in it? (a) a solution (b) a crystal (c) a magnet (d) a rainbow
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 same glass”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.🧺 Which of these is not needed for the balloon rocket? (a) a drinking straw (b) two chairs (c) sticky tape (d) a magnet
6. 6.True or false: small test objects is not needed for the float-or-sink test. (a) True (b) False
7. 7.🛟 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
8. 8.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a balloon (b) warm water (c) cold water (d) a teaspoon
9. 9.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) a roof edge (c) a high window ledge (d) from your raised hand
10. 10.True or false: a balloon is not needed for the balloon rocket. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a coin (b) a pebble (c) very salty water (d) cooking oil
12. 12.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) sand (d) table salt
13. 13.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
14. 14.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is kept the same. (a) False (b) True
15. 15.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the petals turn bluish (c) the water turns green (d) the flower floats away
16. 16.🧺 Do we need yeast for the float-or-sink test? (a) not needed (b) needed
17. 17.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the kind of sugar is the one thing we change. (a) True (b) False
18. 18.⚖️ 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
19. 19.🧺 Which of these is not needed for the density tower? (a) a spoon (b) turmeric powder (c) water with food colour (d) a tall clear glass
20. 20.🎈 When does the balloon rocket stop? (a) it never stops (b) when the air runs out (c) when it gets cold (d) when it turns blue
21. 21.🛟 Why should only a grown-up handle any hot water? (a) hot water is heavy (b) it changes colour (c) hot water is magnetic (d) hot water can scald
22. 22.🔍 You drop a coin into a tub of water. What do you see? (a) it floats (b) it dissolves (c) it bounces up (d) it sinks
23. 23.🍯 Why does honey sink to the bottom of the glass? (a) it is the stickiest (b) it is the densest (c) it is the coldest (d) it is yellow
24. 24.True or false: an ice cube sinks in water. (a) False (b) True
25. 25.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the amount of water (b) the same window (c) the time of day (d) brightness of rainbow
26. 26.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to splash everyone (b) to win a prize (c) to hide the corks (d) to keep children safe
27. 27.📘 What pulls the paper helicopter down to the floor? (a) the wind (b) magnetism (c) air pressure (d) gravity
28. 28.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) a long string (c) vinegar (d) a balloon
29. 29.True or false: a balloon is not needed for the coloured flower experiment. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) making ice lollies (b) wet hair drying (c) water becoming ice (d) a pond icing over
31. 31.🍯 Which of these is less dense than water? (a) a glass marble (b) a coin (c) a pebble (d) a ping-pong ball
32. 32.True or false: a big bowl is needed for the water cycle bowl. (a) False (b) True
33. 33.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) a sheet of white paper (c) a balloon (d) a clear glass of water
34. 34.🥛 Which of these works by air pressure? (a) a magnetic chess set (b) a suction hook (c) a fridge magnet (d) a magnetic pin holder
35. 35.True or false: a battery cell is needed for the paper helicopter. (a) True (b) False
36. 36.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
37. 37.🔍 Which is the odd one out? (a) a coin (b) air (c) a ping-pong ball (d) an ice cube
38. 38.🌈 How many colours do we name in a rainbow (VIBGYOR)?
39. 39.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a magnet (b) a few hours of waiting (c) a white flower (d) food colour
40. 40.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) it goes faster (c) no change at all (d) more friction, less far

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