Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 695 · 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: cotton wool is not needed for the dissolving test. (a) True (b) False
2. 2.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
3. 3.🚀 In “push back, move forward”, which way does the swimmer go? (a) goes forward (b) goes backward
4. 4.💧 Dip a cotton thread into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
5. 5.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same glass”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.🌈 How many colours do we name in a rainbow (VIBGYOR)?
7. 7.🧺 Which of these is needed for the density tower? (a) a tall clear glass (b) a magnet (c) a balloon (d) turmeric powder
8. 8.🔍 Which is the odd one out? (a) cooking oil (b) a cork (c) a pebble (d) air
9. 9.🚁 Dropped from a raised hand, does a crumpled paper ball fall slowly or fast? (a) falls slowly (b) falls fast
10. 10.True or false: a steel spoon does not let water climb. (a) False (b) True
11. 11.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to win a prize (b) to splash everyone (c) to hide the corks (d) to keep children safe
12. 12.🛟 Does a steel spoon float or sink in water? (a) sinks (b) floats
13. 13.🛟 Which of these floats on water? (a) a steel spoon (b) a pebble (c) a feather (d) an iron nail
14. 14.True or false: a fridge magnet works by magnetism. (a) True (b) False
15. 15.🔮 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
16. 16.💧 In the covered bowl, where does the water vapour come from? (a) water warmed by the Sun (b) the bowl itself (c) the air outside (d) the cling film
17. 17.🔮 Predict: you fold the two blades the other way. What changes? (a) it spins the other way (b) it falls upward (c) it does not fall (d) it turns blue
18. 18.True or false: a big sugar cube dissolves faster. (a) True (b) False
19. 19.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) True (b) False
20. 20.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of sugar is kept the same. (a) True (b) False
21. 21.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the same glass (b) the same three liquids (c) the order of the layers (d) the order of pouring
23. 23.🧺 Which of these is not needed for the density tower? (a) a balloon (b) cooking oil (c) a spoon (d) water with food colour
24. 24.🔍 Which is the odd one out? (a) a glass marble (b) an iron nail (c) a cork (d) a ball of clay
25. 25.🧺 Which of these is needed for the paper helicopter? (a) a balloon (b) a ruler (c) a magnet (d) a battery cell
26. 26.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the honey layer (c) on top of the oil (d) in the water layer
27. 27.True or false: a balloon is not needed for the balloon rocket. (a) False (b) True
28. 28.True or false: yeast is needed for the card-on-a-glass trick. (a) False (b) True
29. 29.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they mix for ever (b) they separate again (c) they turn to honey (d) they become solid
30. 30.🧊 Why does an ice cube float on water? (a) ice is magnetic (b) water is sticky (c) ice is less dense (d) ice is very cold
31. 31.🔍 Which is the odd one out? (a) drops under a pot lid (b) ice becoming water (c) butter going runny (d) snow turning to water
32. 32.🚀 Which of these goes backward? (a) the balloon (b) the swimmer (c) water from the oars (d) the rowing boat
33. 33.🧺 Do we need cold water for the dissolving test? (a) needed (b) not needed
34. 34.True or false: a spoon is needed for the density tower. (a) True (b) False
35. 35.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.🔮 Predict: the string slopes uphill. What happens? (a) it goes backward first (b) it travels farther (c) it speeds up (d) it travels less far
37. 37.⚖️ 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 the layers is what we measure. (a) True (b) False
38. 38.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) how full the glass is (b) the same glass (c) the same card (d) the way we turn it
39. 39.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns brighter (b) it floats away (c) it turns all red (d) the rainbow fades
40. 40.⚖️ 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 water temperature (c) the stirring (d) time to dissolve

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