Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 703 · 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.🥄 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.🥄 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.📘 What is water vapour? (a) tiny ice cubes (b) a kind of smoke (c) salty water (d) water as a gas
4. 4.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) some water evaporates (c) it turns to ice (d) the water increases
5. 5.True or false: a teaspoon is not needed for the dissolving test. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) a paper towel (b) a rubber eraser (c) a flower stem (d) a strip of cloth
7. 7.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we change it (b) we measure it (c) we keep it the same
8. 8.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the room it stands in (b) the length of the stem (c) time for colour to show (d) the amount of water
9. 9.True or false: a glass of water is needed for the coloured flower experiment. (a) True (b) False
10. 10.True or false: an open sheet of paper falls fast through the air. (a) True (b) False
11. 11.🍯 Which of these is denser than water? (a) a ping-pong ball (b) honey (c) an ice cube (d) a cork
12. 12.🍯 Which of these is less dense than water? (a) a cork (b) very salty water (c) a coin (d) a pebble
13. 13.🛟 Does a steel spoon float or sink in water? (a) sinks (b) floats
14. 14.🔍 Which is the odd one out? (a) an ice-cream stick (b) a coin (c) a pebble (d) an iron nail
15. 15.🔍 Which is the odd one out? (a) a paper towel (b) a plastic ruler (c) a flower stem (d) a piece of chalk
16. 16.🧺 Which of these is not needed for the dissolving test? (a) a teaspoon (b) two clear glasses (c) cold water (d) a magnet
17. 17.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it spins the other way (c) it does not fall (d) it turns blue
18. 18.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a white flower (c) turmeric powder (d) a glass of water
19. 19.🧺 Do we need warm water for the dissolving test? (a) needed (b) not needed
20. 20.⚖️ 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 “how much of each liquid”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🔍 Which is the odd one out? (a) small pebbles (b) baking soda (c) food colour (d) glucose powder
22. 22.🌊 What pushes a floating cork upward? (a) the cork itself (b) the water (c) the tub (d) the air above
23. 23.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is kept the same. (a) True (b) False
24. 24.⚖️ 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
25. 25.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it melts (c) it sinks (d) it turns blue
26. 26.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) the cold water (c) glue on the card (d) a magnet
27. 27.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) forward (c) it stays still (d) backward
28. 28.🥄 Which of these dissolves in water? (a) sand (b) cooking oil (c) small pebbles (d) food colour
29. 29.🥛 Which of these works by magnetism? (a) a drinking straw (b) a bicycle pump (c) a magnetic chess set (d) a medicine dropper
30. 30.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) a glass of water (c) a towel (d) turmeric powder
31. 31.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we keep it the same (b) we measure it (c) we change it
32. 32.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we change it (b) we keep it the same (c) we measure it
33. 33.🧺 Which of these is needed for the water rainbow? (a) yeast (b) a sheet of white paper (c) a magnet (d) turmeric powder
34. 34.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is kept the same. (a) False (b) True
35. 35.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: brightness of rainbow is kept the same. (a) True (b) False
36. 36.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same window is the one thing we change. (a) True (b) False
37. 37.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) petals are magnetic (c) petals like colour (d) the stem is hot
38. 38.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the person dropping (b) the drop height (c) the paper clip (d) time to reach the floor
39. 39.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
40. 40.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed

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