Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 793 · 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: air is less dense than water. (a) True (b) False
2. 2.True or false: a battery cell is not needed for the density tower. (a) False (b) True
3. 3.True or false: a battery cell is needed for the balloon rocket. (a) True (b) False
4. 4.True or false: the swimmer goes forward. (a) False (b) True
5. 5.💧 Which change is this: ice becoming water? (a) freezing (b) condensation (c) evaporation (d) melting
6. 6.🧺 Do we need cotton wool for the dissolving test? (a) needed (b) not needed
7. 7.🧺 Which of these is not needed for the paper helicopter? (a) a paper clip (b) a pencil (c) a magnet (d) safety scissors
8. 8.🧺 Do we need a stiff postcard for the card-on-a-glass trick? (a) needed (b) not needed
9. 9.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) some water evaporates (c) the water increases (d) it turns to ice
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a glass of water (c) turmeric powder (d) a stiff postcard
11. 11.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
12. 12.🛟 Where should you do the card-and-glass trick? (a) on a bed (b) over a sink or bucket (c) near a plug point (d) over a laptop
13. 13.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) water with food colour (c) turmeric powder (d) a tall clear glass
14. 14.💧 Which of these does not let water climb? (a) a strip of cloth (b) a sugar cube (c) a paper towel (d) a piece of foil
15. 15.🔮 Predict: the string slopes uphill. What happens? (a) it travels farther (b) it goes backward first (c) it travels less far (d) it speeds up
16. 16.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) warm water (c) a clock or timer (d) a balloon
17. 17.True or false: an ice-cream stick sinks in water. (a) True (b) False
18. 18.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is the one thing we change. (a) True (b) False
19. 19.True or false: water with food colour is needed for the density tower. (a) True (b) False
20. 20.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the cling film cover is the one thing we change. (a) True (b) False
21. 21.🛟 Which is the safe way to do the float-or-sink test? (a) wipe up spills at once (b) run around the tub (c) play near a deep pond (d) leave water on the floor
22. 22.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals lose water to air (c) the stem is hot (d) petals like colour
23. 23.📘 What pulls the paper helicopter down to the floor? (a) the wind (b) gravity (c) magnetism (d) air pressure
24. 24.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is kept the same? (a) the amount of water (b) brightness of rainbow (c) the same glass
25. 25.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) a roof edge (c) a wobbly chair (d) from your raised hand
26. 26.🧺 Do we need small test objects for the float-or-sink test? (a) not needed (b) needed
27. 27.🔍 Which is the odd one out? (a) a coin (b) honey (c) a pebble (d) an ice cube
28. 28.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same tape”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) yeast (b) water (c) a big bowl (d) sunlight
30. 30.⚖️ 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) how many drops form (b) sun or shade (c) the amount of water
31. 31.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it melts (c) it turns blue (d) it sinks
33. 33.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
34. 34.🧺 Which of these is not needed for the balloon rocket? (a) sticky tape (b) a magnet (c) a long string (d) a balloon
35. 35.🌈 How many colours do we name in a rainbow (VIBGYOR)?
36. 36.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is the one thing we change? (a) the length of the blades (b) the person dropping (c) the paper clip (d) the drop height
38. 38.🧺 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
39. 39.💧 Which change is this: water becoming ice? (a) evaporation (b) melting (c) freezing (d) condensation
40. 40.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) how many drops form (b) sun or shade (c) the time we wait (d) the cling film cover

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