Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 388 · 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 is the odd one out? (a) glucose powder (b) sugar (c) table salt (d) sand
2. 2.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
3. 3.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) the stem is hot (c) petals are magnetic (d) petals like colour
4. 4.🧺 Do we need a ruler for the paper helicopter? (a) not needed (b) needed
5. 5.🔍 Which is the odd one out? (a) a bicycle pump (b) a drinking straw (c) a suction hook (d) a fridge magnet
6. 6.True or false: a mirror is needed for the paper helicopter. (a) False (b) True
7. 7.🌈 How many colours do we name in a rainbow (VIBGYOR)?
8. 8.🔍 Which is the odd one out? (a) a steel spoon (b) a paper helicopter (c) a crumpled paper ball (d) a stone
9. 9.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) the time we wait (b) how many drops form (c) sun or shade
10. 10.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the amount of water (b) the same glass (c) the same white paper (d) the time of day
11. 11.🔮 Predict: the string slopes uphill. What happens? (a) it travels farther (b) it travels less far (c) it goes backward first (d) it speeds up
12. 12.True or false: a mirror is not needed for the density tower. (a) False (b) True
13. 13.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a drinking straw (c) a vacuum cleaner (d) a compass needle
14. 14.True or false: a balloon is needed for the water rainbow. (a) False (b) True
15. 15.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) neither of them (b) both the same (c) powdered sugar (d) the sugar cube
16. 16.🚀 Which of these goes backward? (a) the swimmer (b) air from the balloon (c) the rocket (d) the balloon
17. 17.⚖️ 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 change it (b) we keep it the same (c) we measure it
18. 18.🧺 Which of these is needed for the density tower? (a) a mirror (b) a balloon (c) a magnet (d) a tall clear glass
19. 19.🥛 Does a compass needle work by air pressure or by magnetism? (a) magnetism (b) air pressure
20. 20.🍯 Which of these is less dense than water? (a) a pebble (b) a cork (c) very salty water (d) a coin
21. 21.🧺 Do we need a magnet for the float-or-sink test? (a) needed (b) not needed
22. 22.🛟 Who should trim the flower stem? (a) a toddler (b) a grown-up (c) a pet (d) anyone, without looking
23. 23.True or false: sand dissolves in water. (a) False (b) True
24. 24.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) faster (c) it stops in the air (d) it floats up
25. 25.🥄 Which of these does not dissolve in water? (a) cooking oil (b) glucose powder (c) baking soda (d) table salt
26. 26.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a mirror (c) a few hours of waiting (d) a glass of water
27. 27.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same glass”? (a) we measure it (b) we keep it the same (c) we change it
28. 28.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) the rainbow fades (c) it turns brighter (d) it floats away
29. 29.🧺 Do we need a paper clip for the paper helicopter? (a) needed (b) not needed
30. 30.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a battery cell (b) a pencil (c) a strip of paper (d) a ruler
31. 31.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a fridge magnet (c) a drinking straw (d) a magnetic chess set
32. 32.⚖️ 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 change it (c) we measure it
33. 33.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) yeast (c) a tall clear glass (d) a spoon
34. 34.🧺 Which of these is needed for the float-or-sink test? (a) a mirror (b) yeast (c) a tub of water (d) a balloon
35. 35.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) the shape of the clay (b) the kind of clay (c) whether it floats
36. 36.True or false: sugar in icy water dissolves faster. (a) False (b) True
37. 37.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) the water turns solid (b) the sugar turns to salt (c) some stays undissolved (d) all of it dissolves
38. 38.🔍 You drop a coin into a tub of water. What do you see? (a) it bounces up (b) it floats (c) it dissolves (d) it sinks
39. 39.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a tub of water (c) small test objects (d) yeast
40. 40.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is kept the same? (a) the room it stands in (b) time for colour to show (c) the length of the stem

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids