Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 621 · 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: a mirror is needed for the paper helicopter. (a) True (b) False
2. 2.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) at the very bottom (c) in the oil layer (d) in the water layer
3. 3.💧 Which change is this: wet clothes drying? (a) freezing (b) evaporation (c) condensation (d) melting
4. 4.⚖️ 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) the cling film cover (b) the time we wait (c) sun or shade (d) the size of the bowl
5. 5.🧺 Which of these is needed for the card-on-a-glass trick? (a) a magnet (b) a balloon (c) a sink or a bucket (d) a mirror
6. 6.🍯 Is cooking oil denser or less dense than water? (a) less dense than water (b) denser than water
7. 7.🧺 Do we need warm water for the dissolving test? (a) needed (b) not needed
8. 8.🧺 Do we need a towel for spills for the float-or-sink test? (a) not needed (b) needed
9. 9.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the stirring (b) the amount of sugar (c) time to dissolve (d) the amount of water
10. 10.🧺 Do we need vinegar for the balloon rocket? (a) needed (b) not needed
11. 11.🔍 Which is the odd one out? (a) an ice cube (b) a pebble (c) an ice-cream stick (d) a cork
12. 12.🧺 Do we need a sheet of white paper for the water rainbow? (a) needed (b) not needed
13. 13.🧺 Which of these is needed for the balloon rocket? (a) two chairs (b) a magnet (c) yeast (d) turmeric powder
14. 14.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) violet (b) green (c) red (d) blue
15. 15.🧺 Do we need turmeric powder for the paper helicopter? (a) needed (b) not needed
16. 16.🌊 What pushes a floating cork upward? (a) the water (b) the air above (c) the tub (d) the cork itself
17. 17.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the honey layer (b) under the honey (c) in the water layer (d) on top of the oil
18. 18.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the kind of clay”? (a) we keep it the same (b) we change it (c) we measure it
19. 19.🧺 Do we need turmeric powder for the card-on-a-glass trick? (a) needed (b) not needed
20. 20.🧺 Do we need yeast for the water cycle bowl? (a) needed (b) not needed
21. 21.🚢 Why can a heavy steel ship float on the sea? (a) steel is very light (b) sea water is warm (c) its hollow shape (d) it has a magnet
22. 22.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes less far (b) it turns into a kite (c) it flies off the string (d) it goes much farther
23. 23.⚖️ 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 change it (b) we keep it the same (c) we measure it
24. 24.🍯 Which of these is denser than water? (a) a coin (b) air (c) an ice cube (d) a ping-pong ball
25. 25.🔍 Which is the odd one out? (a) air (b) very salty water (c) an ice cube (d) cooking oil
26. 26.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) water (b) a battery cell (c) ice cubes (d) a big bowl
27. 27.True or false: a balloon is needed for the float-or-sink test. (a) True (b) False
28. 28.True or false: a balloon is not needed for the water cycle bowl. (a) True (b) False
29. 29.True or false: a towel is not needed for the card-on-a-glass trick. (a) True (b) False
30. 30.🔮 Predict: does stirring make sugar dissolve faster or slower? (a) the same (b) not at all (c) slower (d) faster
31. 31.🚀 Which of these goes backward? (a) the rocket (b) water a swimmer pushes (c) the rowing boat (d) the balloon
32. 32.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the petals turn bluish (c) the stem turns to ice (d) the flower floats away
33. 33.True or false: wet hair drying is condensation. (a) False (b) True
34. 34.🔮 A big log and a small pebble go into a pond. Which one floats? (a) neither of them (b) both of them (c) the big log (d) the small pebble
35. 35.⚖️ 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 pouring is kept the same. (a) True (b) False
36. 36.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) two clear glasses (b) a teaspoon (c) a balloon (d) a clock or timer
37. 37.🔮 Predict: a strip of paper towel dips into coloured water. What happens? (a) it turns to plastic (b) colour climbs up it (c) nothing ever happens (d) it sinks at once
38. 38.🥄 Which of these dissolves slower? (a) sugar in warm water (b) sugar stirred well (c) powdered sugar (d) sugar left unstirred
39. 39.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a mirror (c) a sunny window (d) a sheet of white paper
40. 40.🛟 What should you do with wet floors after the experiment? (a) pour more water (b) leave them wet (c) wipe them dry (d) slide on them

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