Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 207 · 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.🛟 How should you check if the sugar has dissolved? (a) taste it (b) poke it with a finger (c) look for leftover grains (d) smell it closely
2. 2.🔍 Which is the odd one out? (a) a ball of clay (b) a ping-pong ball (c) a steel spoon (d) a coin
3. 3.🧺 Do we need a balloon for the density tower? (a) not needed (b) needed
4. 4.🧺 Which of these is needed for the density tower? (a) a spoon (b) yeast (c) a magnet (d) a mirror
5. 5.🥚 A fresh egg sinks in plain water. What makes it float? (a) lots of salt stirred in (b) a little shaking (c) a few ice cubes (d) more plain water
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a stiff postcard (d) turmeric powder
7. 7.🛟 Which of these sinks in water? (a) a coin (b) an empty capped bottle (c) a feather (d) a cork
8. 8.🚢 Why can a heavy steel ship float on the sea? (a) sea water is warm (b) its hollow shape (c) it has a magnet (d) steel is very light
9. 9.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the kind of paper (b) time to reach the floor (c) the length of the blades (d) the drop height
10. 10.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we keep it the same (b) we change it (c) we measure it
11. 11.🌈 Why does sunlight make a rainbow through a glass of water? (a) water splits the light (b) the water is coloured (c) the glass is painted (d) the paper makes colours
12. 12.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil makes it rain (c) oil attracts magnets (d) oil turns into honey
13. 13.🔍 Which is the odd one out? (a) baking soda (b) sand (c) small pebbles (d) chalk powder
14. 14.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) cotton wool (c) cold water (d) sugar
15. 15.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
16. 16.🔍 Which is the odd one out? (a) a dry leaf (b) a glass marble (c) an ice cube (d) a feather
17. 17.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) sugar in icy water (c) sugar in warm water (d) a big sugar cube
18. 18.🔍 Which is the odd one out? (a) air (b) a coin (c) a pebble (d) a glass marble
19. 19.🍯 Which of these is denser than water? (a) a coin (b) cooking oil (c) air (d) a cork
20. 20.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) yellow (b) red (c) violet (d) orange
21. 21.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a magnet (c) snow falling (d) a small rainbow
22. 22.🧺 Which of these is needed for the balloon rocket? (a) sticky tape (b) a battery cell (c) a magnet (d) a mirror
23. 23.⚖️ 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 same white paper (b) brightness of rainbow (c) the same glass (d) the amount of water
24. 24.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a few hours of waiting (c) a white flower (d) a magnet
25. 25.🌊 What pushes a floating cork upward? (a) the air above (b) the water (c) the cork itself (d) the tub
26. 26.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) air inside pushes back (b) water is hiding there (c) the cap is sticky (d) the bottle is magnetic
27. 27.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of the layers (b) how much of each liquid (c) the same glass (d) the same three liquids
28. 28.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a balloon rocket (b) a fridge magnet (c) a mirror (d) a sundial
30. 30.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) magnetism (c) capillary action (d) melting
31. 31.🧺 Which of these is needed for the dissolving test? (a) a magnet (b) a comb (c) honey (d) two clear glasses
32. 32.⚖️ 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 pouring”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the flower floats away (c) the stem turns to ice (d) the petals turn bluish
34. 34.💧 Which change is this: a misty bathroom mirror? (a) condensation (b) melting (c) evaporation (d) freezing
35. 35.🧺 Do we need a battery cell for the balloon rocket? (a) not needed (b) needed
36. 36.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) False (b) True
37. 37.🔍 What do you see after pouring honey, water and oil into one glass? (a) the glass gets hot (b) one mixed colour (c) three separate layers (d) bubbles of gas
38. 38.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a magnetic chess set (c) a compass needle (d) a fridge magnet
39. 39.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) the sugar turns to salt (c) the water turns solid (d) some stays undissolved
40. 40.🧊 Why does an ice cube float on water? (a) ice is very cold (b) ice is magnetic (c) ice is less dense (d) water is sticky

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