Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 372 · 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 denser than water? (a) cooking oil (b) a pebble (c) a ping-pong ball (d) an ice cube
2. 2.🥄 Does sugar left unstirred dissolve faster or slower? (a) slower (b) faster
3. 3.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) water with food colour (c) turmeric powder (d) cooking oil
4. 4.📘 What does “dense” mean? (a) very thin (b) very hot (c) heavy for its size (d) very colourful
5. 5.True or false: a fridge magnet works by air pressure. (a) True (b) False
6. 6.🥄 Does a big sugar cube dissolve faster or slower? (a) slower (b) faster
7. 7.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to stop the spinning (b) to make it magnetic (c) to make it fall slower (d) to weigh down the bottom
8. 8.🔮 Predict: you blow the balloon up only a little. What happens? (a) it turns into a kite (b) it goes less far (c) it flies off the string (d) it goes much farther
9. 9.🧺 Which of these is needed for the water cycle bowl? (a) cling film (b) a magnet (c) a battery cell (d) a balloon
10. 10.🛟 What should you do after handling food colour? (a) rub your eyes (b) lick your fingers (c) wash your hands (d) wipe them on walls
11. 11.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) water splits the light (c) the water is coloured (d) the glass is painted
12. 12.🧺 Which of these is not needed for the dissolving test? (a) two clear glasses (b) a teaspoon (c) cold water (d) cotton wool
13. 13.🛟 Which of these floats on water? (a) a steel spoon (b) a ball of clay (c) an empty capped bottle (d) an iron nail
14. 14.True or false: a glass marble lets water climb up it. (a) False (b) True
15. 15.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.True or false: an open sheet of paper falls fast through the air. (a) True (b) False
17. 17.🔍 What do you see a day after a white flower stands in blue water? (a) the stem turns to ice (b) the water turns green (c) the flower floats away (d) the petals turn bluish
18. 18.🚁 What does the paper helicopter do as it falls? (a) it flies upward (b) it stays still in air (c) it turns into a ball (d) it spins round
19. 19.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a teaspoon (b) cold water (c) a mirror (d) a clock or timer
20. 20.🥄 Why does sugar dissolve faster in warm water? (a) warm water is thicker (b) sugar likes the dark (c) cold water is wet (d) particles move faster
21. 21.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a roof edge (c) a high window ledge (d) a wobbly chair
22. 22.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) neither of them (c) powdered sugar (d) the sugar cube
23. 23.🛟 Which rule keeps you safe when working with sunlight? (a) never look at the Sun (b) look at it through glass (c) stare at the Sun (d) look at it in a mirror
24. 24.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is kept the same? (a) the order of pouring (b) the order of the layers (c) the same three liquids
25. 25.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a few hours of waiting (c) a glass of water (d) turmeric powder
26. 26.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.🧺 Which of these is not needed for the float-or-sink test? (a) small test objects (b) a results table (c) a tub of water (d) a battery cell
28. 28.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a paper clip (b) safety scissors (c) a strip of paper (d) a magnet
29. 29.🛟 Who should pour the warm water in the dissolving test? (a) the youngest child (b) a grown-up (c) nobody needs to (d) a friend who is running
30. 30.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a magnet (b) sticky tape (c) a drinking straw (d) two chairs
31. 31.🛟 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 win a prize (d) to hide the corks
32. 32.🍯 Is cooking oil denser or less dense than water? (a) denser than water (b) less dense than water
33. 33.💧 Which change is this: water becoming ice? (a) evaporation (b) melting (c) freezing (d) condensation
34. 34.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes backward (b) goes forward
35. 35.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is the one thing we change. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) a magnetic chess set (b) a compass needle (c) a fridge magnet (d) a drinking straw
37. 37.🧺 Do we need a sunny window for the water rainbow? (a) needed (b) not needed
38. 38.True or false: a balloon is needed for the water rainbow. (a) False (b) True
39. 39.True or false: a sunny window is not needed for the water rainbow. (a) True (b) False
40. 40.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) pour it on the floor (c) throw the glass (d) do not lick the spoon

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