Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 702 · 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.🎈 Why does the balloon rocket move along the string? (a) escaping air pushes it (b) a magnet pulls it (c) the straw is heavy (d) the string pulls it
2. 2.🔍 Which is the odd one out? (a) a plastic ruler (b) a piece of foil (c) a rubber eraser (d) a sugar cube
3. 3.🥄 Which of these dissolves in water? (a) small pebbles (b) sand (c) cooking oil (d) glucose powder
4. 4.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) False (b) True
6. 6.📘 Every push has an equal push in the opposite direction. Which toy shows this? (a) a fridge magnet (b) a sundial (c) a balloon rocket (d) a mirror
7. 7.🔍 You drop a coin into a tub of water. What do you see? (a) it floats (b) it dissolves (c) it sinks (d) it bounces up
8. 8.🧺 Do we need a clock or timer for the dissolving test? (a) not needed (b) needed
9. 9.True or false: a compass needle works by air pressure. (a) True (b) False
10. 10.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) honey (c) a balloon (d) a spoon
11. 11.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) the amount of water (b) sun or shade (c) the size of the bowl (d) how many drops form
12. 12.True or false: food colour dissolves in water. (a) False (b) True
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.🛟 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
15. 15.🧺 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) a mirror (d) a sheet of white paper
16. 16.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to splash everyone (b) to keep children safe (c) to hide the corks (d) to win a prize
17. 17.⚖️ 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 change it (c) we measure it
18. 18.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to make it magnetic (b) to stop the spinning (c) to weigh down the bottom (d) to make it fall slower
19. 19.True or false: a long string is not needed for the balloon rocket. (a) True (b) False
20. 20.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the cap is sticky (b) air inside pushes back (c) the bottle is magnetic (d) water is hiding there
21. 21.True or false: a towel for spills is not needed for the float-or-sink test. (a) True (b) False
22. 22.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) a battery cell (d) a sunny window
23. 23.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is kept the same. (a) True (b) False
24. 24.🧺 Do we need small test objects for the float-or-sink test? (a) needed (b) not needed
25. 25.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) turmeric powder (d) a stiff postcard
26. 26.🧺 Which of these is needed for the water cycle bowl? (a) a balloon (b) a battery cell (c) a magnet (d) a small cup
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 what we measure. (a) True (b) False
28. 28.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) ice cubes (c) cling film (d) a balloon
29. 29.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a small cup (b) ice cubes (c) cling film (d) a mirror
30. 30.🥄 Which of these dissolves faster? (a) sugar left unstirred (b) a big sugar cube (c) sugar stirred well (d) sugar in icy water
31. 31.🔮 Predict: you blow up a balloon. What fills it? (a) smoke (b) water (c) sand (d) air
32. 32.True or false: a battery cell is needed for the balloon rocket. (a) True (b) False
33. 33.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) powdered sugar (b) the sugar cube (c) neither of them (d) both the same
34. 34.🔍 Which is the odd one out? (a) a glass marble (b) a ball of clay (c) a pebble (d) an ice cube
35. 35.True or false: a mirror is not needed for the card-on-a-glass trick. (a) False (b) True
36. 36.🌈 How many colours do we name in a rainbow (VIBGYOR)?
37. 37.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the small pebble (b) the big log (c) neither of them (d) both of them
38. 38.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns brighter (c) it turns all red (d) the rainbow fades
39. 39.🔍 Which is the odd one out? (a) a medicine dropper (b) a suction hook (c) a drinking straw (d) a magnetic pin holder
40. 40.⚖️ 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 amount of water (c) the amount of colour (d) time for colour to show

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