Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 146 · 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.True or false: baking soda does not dissolve in water. (a) True (b) False
2. 2.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a ruler (b) safety scissors (c) a pencil (d) turmeric powder
3. 3.True or false: sugar in warm water dissolves faster. (a) True (b) False
4. 4.🚀 In “push back, move forward”, which way does gas from the rocket go? (a) goes forward (b) goes backward
5. 5.True or false: a glass marble is denser than water. (a) True (b) False
6. 6.🥛 Which of these works by air pressure? (a) a suction hook (b) a compass needle (c) a magnetic pin holder (d) a fridge magnet
7. 7.🧺 Do we need a drinking straw for the balloon rocket? (a) not needed (b) needed
8. 8.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the amount of water (b) the kind of sugar (c) time to dissolve (d) the stirring
9. 9.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it changes colour (c) it turns into a kite (d) it gets too heavy
10. 10.🔍 Which is the odd one out? (a) ice becoming water (b) butter going runny (c) snow turning to water (d) sweat drying on skin
11. 11.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we keep it the same (b) we change it (c) we measure it
12. 12.True or false: a magnet is needed for the water cycle bowl. (a) True (b) False
13. 13.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same card is the one thing we change. (a) True (b) False
14. 14.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
15. 15.🔍 Which is the odd one out? (a) an empty capped bottle (b) a pebble (c) a ping-pong ball (d) an ice cube
16. 16.🍯 Which of these is less dense than water? (a) a pebble (b) a coin (c) an ice cube (d) very salty water
17. 17.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a results table (c) small test objects (d) a balloon
18. 18.True or false: a paper helicopter falls slowly through the air. (a) False (b) True
19. 19.⚖️ 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 glass is kept the same. (a) True (b) False
20. 20.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is what we measure. (a) True (b) False
21. 21.🔮 A cork floats in tap water. What happens in very salty water? (a) it sinks (b) it dissolves (c) it turns white (d) it still floats
22. 22.🛟 Which rule keeps the density tower experiment safe? (a) throw the glass (b) pour it on the floor (c) do not lick the spoon (d) taste each layer
23. 23.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same window (b) brightness of rainbow (c) the time of day (d) the same white paper
24. 24.True or false: an iron nail sinks in water. (a) False (b) True
25. 25.True or false: a balloon is needed for the balloon rocket. (a) False (b) True
26. 26.🍯 Which of these is less dense than water? (a) very salty water (b) a coin (c) a glass marble (d) air
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 order of pouring is the one thing we change. (a) True (b) False
28. 28.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) turmeric powder (b) a balloon (c) a drinking straw (d) two chairs
29. 29.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we change it (b) we keep it the same (c) we measure it
30. 30.🧺 Which of these is needed for the paper helicopter? (a) a magnet (b) turmeric powder (c) a mirror (d) safety scissors
31. 31.🧺 Do we need a balloon for the card-on-a-glass trick? (a) needed (b) not needed
32. 32.True or false: a glass of water is needed for the coloured flower experiment. (a) True (b) False
33. 33.🥛 Does a compass needle work by air pressure or by magnetism? (a) air pressure (b) magnetism
34. 34.🔮 Predict: you fold the two blades the other way. What changes? (a) it turns blue (b) it does not fall (c) it falls upward (d) it spins the other way
35. 35.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is what we measure. (a) True (b) False
36. 36.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a balloon (b) a few hours of waiting (c) food colour (d) a white flower
37. 37.💧 Which change is this: butter going runny? (a) evaporation (b) freezing (c) condensation (d) melting
38. 38.🛟 What should you do after handling food colour? (a) rub your eyes (b) wash your hands (c) wipe them on walls (d) lick your fingers
39. 39.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it sinks (c) it turns blue (d) it melts
40. 40.🚀 In “push back, move forward”, which way does the balloon go? (a) goes backward (b) goes forward

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