Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 321 · 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 not needed for the water cycle bowl? (a) a balloon (b) a big bowl (c) a small cup (d) water
2. 2.True or false: a sugar cube does not let water climb. (a) True (b) False
3. 3.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it melts (c) it sinks (d) it turns blue
4. 4.🍯 Which of these is denser than water? (a) an ice cube (b) cooking oil (c) a cork (d) a coin
5. 5.True or false: a magnet is not needed for the balloon rocket. (a) True (b) False
6. 6.🧺 Which of these is not needed for the balloon rocket? (a) a drinking straw (b) a battery cell (c) two chairs (d) a long string
7. 7.🚁 Why does the paper helicopter fall slowly? (a) air pushes on its blades (b) it has no weight (c) a magnet holds it (d) the floor pushes it
8. 8.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a mirror (c) a towel (d) yeast
9. 9.🚀 Which of these goes backward? (a) the rowing boat (b) the swimmer (c) water from the oars (d) the balloon
10. 10.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) yeast (c) a tall clear glass (d) water with food colour
11. 11.⚖️ 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) how much of each liquid
12. 12.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is kept the same. (a) True (b) False
13. 13.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a high window ledge (c) a wobbly chair (d) a roof edge
14. 14.⚖️ 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 three liquids”? (a) we measure it (b) we keep it the same (c) we change it
15. 15.🥄 Which of these does not dissolve in water? (a) chalk powder (b) sugar (c) baking soda (d) food colour
16. 16.🧺 Which of these is not needed for the density tower? (a) water with food colour (b) a spoon (c) a tall clear glass (d) yeast
17. 17.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the stem turns to ice (c) the water turns green (d) the petals turn bluish
18. 18.True or false: the rocket goes backward. (a) False (b) True
19. 19.🥛 Which of these works by air pressure? (a) a fridge magnet (b) a magnetic chess set (c) a magnetic pin holder (d) a suction hook
20. 20.🛟 Who should pour the warm water in the dissolving test? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
21. 21.🔍 Which is the odd one out? (a) a paper helicopter (b) a coin (c) an open sheet of paper (d) a toy parachute
22. 22.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.🌈 In VIBGYOR, what number colour is red?
24. 24.🥛 Which of these works by air pressure? (a) a drinking straw (b) a fridge magnet (c) a magnetic chess set (d) a compass needle
25. 25.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we keep it the same (b) we measure it (c) we change it
26. 26.🛟 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
27. 27.True or false: honey is needed for the dissolving test. (a) False (b) True
28. 28.🔮 A big log and a small pebble go into a pond. Which one floats? (a) the big log (b) neither of them (c) both of them (d) the small pebble
29. 29.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) do not lick the spoon (c) pour it on the floor (d) throw the glass
30. 30.🔍 Which is the odd one out? (a) a paper towel (b) a flower stem (c) a piece of chalk (d) a steel spoon
31. 31.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) under the honey (b) in the water layer (c) on top of the oil (d) in the honey layer
32. 32.True or false: a ping-pong ball is less dense than water. (a) False (b) True
33. 33.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is kept the same. (a) True (b) False
34. 34.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.⚖️ 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 order of pouring (c) the order of the layers (d) the same three liquids
36. 36.🛟 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
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is what we measure? (a) the person dropping (b) the paper clip (c) time to reach the floor (d) the length of the blades
38. 38.🥄 Why does sugar dissolve faster in warm water? (a) warm water is thicker (b) cold water is wet (c) sugar likes the dark (d) particles move faster
39. 39.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the glass breaks (b) the card flies away (c) the water turns to ice (d) the card stays on

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