Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 293 · 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 many colours do we name in a rainbow (VIBGYOR)?
2. 2.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) water with food colour (c) a tall clear glass (d) turmeric powder
3. 3.🛟 How should you check if the sugar has dissolved? (a) taste it (b) smell it closely (c) poke it with a finger (d) look for leftover grains
4. 4.🚀 Which of these goes backward? (a) the rowing boat (b) water from the oars (c) the rocket (d) the balloon
5. 5.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
6. 6.📘 What is water vapour? (a) a kind of smoke (b) tiny ice cubes (c) salty water (d) water as a gas
7. 7.True or false: drops under a pot lid is condensation. (a) False (b) True
8. 8.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the water temperature”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is the one thing we change. (a) True (b) False
10. 10.📘 What do we call water with sugar dissolved in it? (a) a magnet (b) a rainbow (c) a crystal (d) a solution
11. 11.True or false: a drinking straw works by magnetism. (a) True (b) False
12. 12.🔍 Which is the odd one out? (a) table salt (b) sugar (c) food colour (d) chalk powder
13. 13.💧 Which change is this: a pond icing over? (a) freezing (b) melting (c) condensation (d) evaporation
14. 14.🧺 Do we need small test objects for the float-or-sink test? (a) needed (b) not needed
15. 15.🧺 Which of these is needed for the water rainbow? (a) a balloon (b) a sunny window (c) a magnet (d) a mirror
16. 16.True or false: an ice cube is denser than water. (a) False (b) True
17. 17.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we measure it (b) we change it (c) we keep it the same
18. 18.🛟 Which of these floats on water? (a) a feather (b) a steel spoon (c) an iron nail (d) a coin
19. 19.True or false: air is less dense than water. (a) False (b) True
20. 20.🚁 Which of these falls slowly through the air? (a) a glass marble (b) a stone (c) a feather (d) a crumpled paper ball
21. 21.⚖️ 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) the same glass (c) the way we turn it (d) whether the card stays
22. 22.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we keep it the same (b) we measure it (c) we change it
23. 23.🥄 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) small test objects (c) a towel for spills (d) a balloon
25. 25.🚀 Which of these goes backward? (a) the swimmer (b) the rowing boat (c) the balloon (d) gas from the rocket
26. 26.🚀 Which of these goes forward? (a) gas from the rocket (b) the rocket (c) air from the balloon (d) water from the oars
27. 27.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same three liquids is what we measure. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) a compass needle (b) a magnetic pin holder (c) a fridge magnet (d) a suction hook
29. 29.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) False (b) True
30. 30.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it sinks (b) it melts (c) it turns blue (d) it floats higher
31. 31.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) run around the tub (c) play near a deep pond (d) wipe up spills at once
32. 32.🌈 In VIBGYOR, what number colour is orange?
33. 33.🔍 Which is the odd one out? (a) a fridge magnet (b) a drinking straw (c) a magnetic chess set (d) a magnetic pin holder
34. 34.🧺 Which of these is needed for the density tower? (a) a magnet (b) a battery cell (c) a tall clear glass (d) a mirror
35. 35.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) snow falling (c) a shadow of ice (d) a magnet
36. 36.True or false: sticky tape is not needed for the balloon rocket. (a) True (b) False
37. 37.🚁 Dropped from a raised hand, does a glass marble fall slowly or fast? (a) falls fast (b) falls slowly
38. 38.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a magnet (b) a teaspoon (c) cold water (d) warm water
39. 39.🛟 Does an iron nail float or sink in water? (a) sinks (b) floats
40. 40.📘 What does “dense” mean? (a) very hot (b) heavy for its size (c) very colourful (d) very thin

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