Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 427 · 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.🧺 Which of these is needed for the coloured flower experiment? (a) a glass of water (b) a battery cell (c) a magnet (d) yeast
2. 2.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) needed (b) not needed
3. 3.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “how many drops form”? (a) we change it (b) we measure it (c) we keep it the same
4. 4.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
5. 5.🚀 In “push back, move forward”, which way does the rocket go? (a) goes backward (b) goes forward
6. 6.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns brighter (c) the rainbow fades (d) it turns all red
7. 7.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) whether it floats (b) the shape of the clay (c) the kind of clay (d) the amount of clay
8. 8.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) no colour change (c) the flower glows (d) the stem turns blue
9. 9.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a glass of water (c) a battery cell (d) a white flower
10. 10.True or false: air from the balloon goes backward. (a) True (b) False
11. 11.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) slower (b) not at all (c) faster (d) the same
12. 12.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) the sugar cube (b) both the same (c) powdered sugar (d) neither of them
13. 13.⚖️ 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 what we measure. (a) False (b) True
14. 14.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) ice cubes (b) cling film (c) yeast (d) water
15. 15.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) warm water (c) a comb (d) two clear glasses
16. 16.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we keep it the same (b) we change it (c) we measure it
17. 17.True or false: turmeric powder is needed for the balloon rocket. (a) False (b) True
18. 18.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the flower floats away (c) the petals turn bluish (d) the stem turns to ice
19. 19.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a magnet (b) cooking oil (c) honey (d) a spoon
20. 20.🌈 How many colours do we name in a rainbow (VIBGYOR)?
21. 21.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
22. 22.💧 Which of these lets water climb up it? (a) a piece of foil (b) a paper towel (c) a glass marble (d) a steel spoon
23. 23.🍯 Which of these is less dense than water? (a) honey (b) a cork (c) a pebble (d) very salty water
24. 24.🚁 Dropped from a raised hand, does a steel spoon fall slowly or fast? (a) falls slowly (b) falls fast
25. 25.🧺 Do we need a spoon for the density tower? (a) not needed (b) needed
26. 26.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the kind of flower (b) time for colour to show (c) the length of the stem (d) the amount of water
27. 27.💧 Dip a sugar cube into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
28. 28.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it gets too heavy (c) it turns into a kite (d) it changes colour
29. 29.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) bright sunlight (c) a clear glass of water (d) a sunny window
30. 30.🔮 Raindrops in the sky act like tiny ___ for sunlight. (a) clouds (b) balloons (c) prisms (d) magnets
31. 31.🥛 Why is it best to fill the glass right to the top? (a) the card gets wet (b) water is heavier (c) little air left inside (d) it looks nicer
32. 32.True or false: a balloon is needed for the float-or-sink test. (a) True (b) False
33. 33.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a balloon (c) a tall clear glass (d) a spoon
34. 34.🥄 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) table salt (d) sand
35. 35.True or false: sunlight is needed for the water cycle bowl. (a) False (b) True
36. 36.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) the same white paper (c) brightness of rainbow
37. 37.🧺 Which of these is not needed for the density tower? (a) a mirror (b) a spoon (c) cooking oil (d) a tall clear glass
38. 38.🧺 Do we need a balloon for the water rainbow? (a) needed (b) not needed
39. 39.True or false: a magnet is not needed for the density tower. (a) False (b) True
40. 40.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) cotton wool (c) two clear glasses (d) cold water

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