Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 631 · 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.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) a teaspoon (c) a comb (d) cold water
2. 2.🧺 Which of these is needed for the water cycle bowl? (a) a balloon (b) a battery cell (c) a small cup (d) a magnet
3. 3.📘 What is water vapour? (a) a kind of smoke (b) tiny ice cubes (c) salty water (d) water as a gas
4. 4.🧺 Do we need a long string for the balloon rocket? (a) not needed (b) needed
5. 5.⚖️ 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 kind of clay (c) the tub of water (d) whether it floats
6. 6.🔍 Which is the odd one out? (a) a piece of thermocol (b) an ice cube (c) an ice-cream stick (d) a coin
7. 7.🔍 Which is the odd one out? (a) a flower stem (b) a plastic ruler (c) a glass marble (d) a steel spoon
8. 8.True or false: a mirror is not needed for the float-or-sink test. (a) True (b) False
9. 9.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the water turns to ice (b) the card stays on (c) the card flies away (d) the glass breaks
10. 10.🔍 Which is the odd one out? (a) a rubber eraser (b) a sugar cube (c) a plastic ruler (d) a piece of foil
11. 11.🧺 Which of these is needed for the float-or-sink test? (a) a balloon (b) a tub of water (c) yeast (d) a mirror
12. 12.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
13. 13.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a battery cell (c) food colour (d) a glass of water
14. 14.🧺 Do we need a mirror for the balloon rocket? (a) not needed (b) needed
15. 15.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) the water increases (c) it turns to salt (d) some water evaporates
16. 16.🧺 Do we need a clock or timer for the dissolving test? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sunny window (c) bright sunlight (d) a battery cell
18. 18.🧺 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 balloon (d) a stiff postcard
19. 19.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) a feather (b) a coin (c) a steel spoon (d) a stone
21. 21.🥄 Does a big sugar cube dissolve faster or slower? (a) faster (b) slower
22. 22.🧺 Do we need a mirror for the water cycle bowl? (a) needed (b) not needed
23. 23.🥄 Which of these dissolves slower? (a) sugar in icy water (b) sugar in warm water (c) sugar stirred well (d) powdered sugar
24. 24.True or false: a small cup is not needed for the water cycle bowl. (a) True (b) False
25. 25.🧺 Do we need bright sunlight for the water rainbow? (a) needed (b) not needed
26. 26.🧺 Do we need turmeric powder for the water rainbow? (a) needed (b) not needed
27. 27.⚖️ 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
28. 28.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is what we measure. (a) False (b) True
29. 29.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is heavier (b) it is magnetic (c) it will not break (d) it is hotter
30. 30.🛟 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
31. 31.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) petals lose water to air (c) petals are magnetic (d) the stem is hot
32. 32.🧺 Do we need a battery cell for the balloon rocket? (a) not needed (b) needed
33. 33.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) a long string (c) a mirror (d) yeast
34. 34.True or false: a cotton thread does not let water climb. (a) True (b) False
35. 35.🧺 Which of these is needed for the water rainbow? (a) a battery cell (b) turmeric powder (c) a mirror (d) a sheet of white paper
36. 36.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) a drinking straw (c) turmeric powder (d) two chairs
37. 37.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a glass of water (b) a few hours of waiting (c) a white flower (d) turmeric powder
38. 38.🧺 Do we need a battery cell for the paper helicopter? (a) needed (b) not needed
39. 39.🔍 How can you get the salt back from salty water? (a) add more water (b) let the water evaporate (c) keep it in a fridge (d) stir it more
40. 40.📘 What does “dense” mean? (a) very hot (b) very thin (c) heavy for its size (d) very colourful

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