Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 242 · 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.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) balloons (b) prisms (c) magnets (d) clouds
2. 2.💧 Which of these is condensation? (a) butter going runny (b) drops under a pot lid (c) wet clothes drying (d) water becoming ice
3. 3.🍯 Is a cork denser or less dense than water? (a) less dense than water (b) denser than water
4. 4.🧺 Do we need a comb for the dissolving test? (a) not needed (b) needed
5. 5.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
6. 6.🥄 Which of these dissolves faster? (a) sugar in icy water (b) powdered sugar (c) sugar left unstirred (d) a big sugar cube
7. 7.🔮 Predict: the string slopes uphill. What happens? (a) it travels farther (b) it speeds up (c) it travels less far (d) it goes backward first
8. 8.🧺 Do we need water with food colour for the density tower? (a) needed (b) not needed
9. 9.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) whether it floats (b) the kind of clay (c) the amount of clay (d) the shape of the clay
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a stiff postcard (c) a sink or a bucket (d) a balloon
11. 11.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it melts (b) it floats higher (c) it turns blue (d) it sinks
12. 12.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
13. 13.🧺 Do we need turmeric powder for the float-or-sink test? (a) not needed (b) needed
14. 14.🍯 Which of these is denser than water? (a) an ice cube (b) a glass marble (c) a cork (d) air
15. 15.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a magnet (c) a small rainbow (d) a shadow of ice
16. 16.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) it stays still (b) straight down (c) backward (d) forward
17. 17.🔍 Which is the odd one out? (a) a suction hook (b) a magnetic chess set (c) a vacuum cleaner (d) a medicine dropper
18. 18.🛟 Which of these sinks in water? (a) a steel spoon (b) a cork (c) a dry leaf (d) an empty capped bottle
19. 19.🧺 Do we need a towel for spills for the float-or-sink test? (a) needed (b) not needed
20. 20.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a white flower (b) yeast (c) a few hours of waiting (d) a glass of water
21. 21.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is what we measure? (a) the shape of the clay (b) the amount of clay (c) whether it floats (d) the kind of clay
22. 22.🔍 Which is the odd one out? (a) a piece of thermocol (b) a steel spoon (c) a coin (d) a pebble
23. 23.⚖️ 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 water temperature (c) the amount of sugar
24. 24.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is the one thing we change. (a) False (b) True
25. 25.🎈 Why does the balloon rocket move along the string? (a) a magnet pulls it (b) escaping air pushes it (c) the straw is heavy (d) the string pulls it
26. 26.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a few hours of waiting (c) a battery cell (d) a white flower
27. 27.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it is heavier (c) it is magnetic (d) it will not break
28. 28.🧺 Do we need cold water for the dissolving test? (a) not needed (b) needed
29. 29.💧 Which change is this: dew on morning grass? (a) evaporation (b) condensation (c) melting (d) freezing
30. 30.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to keep children safe (b) to splash everyone (c) to win a prize (d) to hide the corks
31. 31.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the shape of the clay”? (a) we measure it (b) we change it (c) we keep it the same
32. 32.🧺 Do we need a battery cell for the float-or-sink test? (a) not needed (b) needed
33. 33.🚢 Why can a heavy steel ship float on the sea? (a) steel is very light (b) sea water is warm (c) it has a magnet (d) its hollow shape
34. 34.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.🛟 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
36. 36.🥄 Does sugar stirred well dissolve faster or slower? (a) slower (b) faster
37. 37.🧺 Do we need a magnet for the water rainbow? (a) not needed (b) needed
38. 38.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) time to dissolve (b) the stirring (c) the water temperature (d) the kind of sugar
39. 39.🧺 Which of these is not needed for the dissolving test? (a) a teaspoon (b) a comb (c) warm water (d) two clear glasses
40. 40.📘 What do we call water with sugar dissolved in it? (a) a rainbow (b) a crystal (c) a solution (d) a magnet

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