Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 696 · 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.⚖️ 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 three liquids”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🔮 Predict: you add two more paper clips. How does it fall? (a) it floats up (b) slower (c) faster (d) it stops in the air
3. 3.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) how full the glass is (b) whether the card stays (c) the same card (d) the same glass
4. 4.🔍 Which is the odd one out? (a) a glass marble (b) a coin (c) an ice-cream stick (d) a steel spoon
5. 5.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it in a mirror (c) look at it through glass (d) never look at the Sun
6. 6.🍯 Is honey denser or less dense than water? (a) less dense than water (b) denser than water
7. 7.🔍 Which is the odd one out? (a) cooking oil (b) honey (c) a ping-pong ball (d) air
8. 8.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we keep it the same (b) we measure it (c) we change it
9. 9.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) from your raised hand (c) a high window ledge (d) a roof edge
10. 10.🍯 Which of these is denser than water? (a) a pebble (b) an ice cube (c) a ping-pong ball (d) cooking oil
11. 11.True or false: a magnet is needed for the water rainbow. (a) False (b) True
12. 12.🧺 Which of these is needed for the float-or-sink test? (a) a battery cell (b) a mirror (c) a balloon (d) small test objects
13. 13.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is the one thing we change. (a) False (b) True
14. 14.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) it goes faster (c) more friction, less far (d) no change at all
15. 15.True or false: air is less dense than water. (a) True (b) False
16. 16.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the same glass (b) brightness of rainbow (c) the amount of water
17. 17.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the paper clip (b) the drop height (c) the person dropping (d) the length of the blades
18. 18.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the stirring (b) the amount of sugar (c) time to dissolve (d) the kind of sugar
19. 19.True or false: a balloon is not needed for the paper helicopter. (a) True (b) False
20. 20.🔍 Which is the odd one out? (a) a vacuum cleaner (b) a magnetic pin holder (c) a compass needle (d) a fridge magnet
21. 21.True or false: butter going runny is evaporation. (a) False (b) True
22. 22.🧺 Which of these is needed for the balloon rocket? (a) yeast (b) two chairs (c) a magnet (d) turmeric powder
23. 23.🛟 Why is a plastic cup safer than a glass for small children here? (a) it will not break (b) it is magnetic (c) it is hotter (d) it is heavier
24. 24.🥄 Which of these dissolves faster? (a) sugar in icy water (b) a big sugar cube (c) sugar left unstirred (d) sugar in warm water
25. 25.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the same card (b) the same glass (c) how full the glass is (d) whether the card stays
26. 26.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a sink or a bucket (c) a stiff postcard (d) a battery cell
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) the same glass (c) how full the glass is
28. 28.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of sugar”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.⚖️ 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 change it (b) we measure it (c) we keep it the same
30. 30.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.True or false: a balloon is needed for the water rainbow. (a) True (b) False
32. 32.True or false: an ice cube sinks in water. (a) False (b) True
33. 33.☀️ What is white sunlight really made of? (a) tiny drops of water (b) tiny bits of dust (c) many colours mixed (d) only yellow light
34. 34.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is what we measure. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) wet clothes drying (b) drops under a pot lid (c) a misty bathroom mirror (d) drops on a cold glass
36. 36.🧺 Which of these is needed for the water cycle bowl? (a) a balloon (b) a magnet (c) a big bowl (d) turmeric powder
37. 37.🧺 Do we need a mirror for the card-on-a-glass trick? (a) needed (b) not needed
38. 38.🫗 Why does cooking oil float on top of water? (a) oil is less dense (b) oil is hot (c) oil is sticky (d) oil is heavier
39. 39.💧 Which of these is freezing? (a) drops on a cold glass (b) water becoming ice (c) butter going runny (d) ice becoming water
40. 40.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a tall clear glass (b) a balloon (c) water with food colour (d) a spoon

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