Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 904 · 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.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) a magnet (c) the cold water (d) air pushing up
2. 2.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
3. 3.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of the layers is kept the same. (a) False (b) True
4. 4.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
5. 5.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
6. 6.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is the one thing we change. (a) False (b) True
7. 7.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they mix for ever (b) they separate again (c) they turn to honey (d) they become solid
8. 8.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) smoke (c) sand (d) water
9. 9.⚖️ 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 measure it (b) we keep it the same (c) we change it
10. 10.🍯 Which of these is less dense than water? (a) a glass marble (b) a coin (c) honey (d) air
11. 11.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the amount of sugar (b) the kind of sugar (c) time to dissolve (d) the water temperature
12. 12.True or false: a spoon is not needed for the density tower. (a) False (b) True
13. 13.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is what we measure. (a) True (b) False
14. 14.🧺 Do we need a magnet for the float-or-sink test? (a) needed (b) not needed
15. 15.🍯 Is a coin denser or less dense than water? (a) less dense than water (b) denser than water
16. 16.🛟 Which of these sinks in water? (a) a ping-pong ball (b) an ice-cream stick (c) an empty capped bottle (d) a metal key
17. 17.💧 Why do water drops form on the outside of a glass of ice water? (a) the glass sweats (b) vapour in air cools (c) ice escapes the glass (d) the glass leaks
18. 18.🧺 Which of these is needed for the paper helicopter? (a) a pencil (b) yeast (c) a mirror (d) a battery cell
19. 19.📘 What does “dense” mean? (a) very colourful (b) heavy for its size (c) very hot (d) very thin
20. 20.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🛟 What should you do after handling food colour? (a) lick your fingers (b) wash your hands (c) rub your eyes (d) wipe them on walls
22. 22.🔍 Which is the odd one out? (a) very salty water (b) cooking oil (c) a glass marble (d) a coin
23. 23.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) the flower glows (c) the petals turn red (d) no colour change
24. 24.🥤 Why does juice go up a drinking straw when you sip? (a) air pushes it up (b) juice likes plastic (c) the straw is hot (d) the straw is magnetic
25. 25.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) a few ice cubes (c) more plain water (d) lots of salt stirred in
26. 26.⚖️ 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
27. 27.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) slower (b) the same (c) not at all (d) faster
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a battery cell (c) a stiff postcard (d) a sink or a bucket
29. 29.💧 Which of these is freezing? (a) sweat drying on skin (b) a pond icing over (c) a misty bathroom mirror (d) wet clothes drying
30. 30.🥄 Which of these dissolves faster? (a) sugar stirred well (b) sugar left unstirred (c) a big sugar cube (d) sugar in icy water
31. 31.🔮 Predict: you blow the balloon up only a little. What happens? (a) it flies off the string (b) it turns into a kite (c) it goes less far (d) it goes much farther
32. 32.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is what we measure. (a) True (b) False
33. 33.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a glass of water (b) a sink or a bucket (c) a mirror (d) a towel
34. 34.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) two chairs (c) a magnet (d) a balloon
35. 35.🔍 Which is the odd one out? (a) an empty capped bottle (b) a cork (c) a pebble (d) an ice cube
36. 36.🛟 Why should the glass of water stand on a steady, flat place? (a) so it gets hot (b) so it turns blue (c) so it does not fall (d) so the Sun moves
37. 37.🌈 In VIBGYOR, what number colour is violet?
38. 38.🚀 Which of these goes forward? (a) water a swimmer pushes (b) water from the oars (c) the balloon (d) air from the balloon
39. 39.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is the one thing we change. (a) True (b) False
40. 40.🧺 Do we need sunlight for the water cycle bowl? (a) not needed (b) needed

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