Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 713 · 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 big sugar cube dissolves slower. (a) False (b) True
2. 2.True or false: a pebble is denser than water. (a) True (b) False
3. 3.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is kept the same. (a) False (b) True
5. 5.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a mirror (b) a tub of water (c) a results table (d) a towel for spills
6. 6.⚖️ 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 measure it (c) we keep it the same
7. 7.True or false: a balloon is needed for the paper helicopter. (a) False (b) True
8. 8.🛟 Where is a safe place to drop the helicopter from? (a) a high window ledge (b) a roof edge (c) from your raised hand (d) a wobbly chair
9. 9.🥄 Does sugar stirred well dissolve faster or slower? (a) faster (b) slower
10. 10.🍯 Which of these is less dense than water? (a) a coin (b) a pebble (c) air (d) a glass marble
11. 11.🧺 Do we need vinegar for the balloon rocket? (a) needed (b) not needed
12. 12.🧺 Do we need a battery cell for the density tower? (a) not needed (b) needed
13. 13.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “the same card”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a towel (b) a magnet (c) a stiff postcard (d) a sink or a bucket
15. 15.🧺 Do we need cotton wool for the dissolving test? (a) needed (b) not needed
16. 16.🛟 Which is a safe rule for the balloon rocket? (a) aim it at your friend (b) put string round a neck (c) keep it away from faces (d) blow it till it bursts
17. 17.🌈 In VIBGYOR, what number colour is green?
18. 18.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) yeast (b) a clear glass of water (c) bright sunlight (d) a sheet of white paper
19. 19.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a mirror (c) a pencil (d) a ruler
20. 20.🛟 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 win a prize (d) to hide the corks
21. 21.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the length of the blades (b) the person dropping (c) time to reach the floor
22. 22.🚁 Which of these falls fast through the air? (a) a toy parachute (b) a fluff of cotton (c) a glass marble (d) an open sheet of paper
23. 23.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
24. 24.🚁 Dropped from a raised hand, does a coin fall slowly or fast? (a) falls slowly (b) falls fast
25. 25.💧 Which of these does not let water climb? (a) a strip of cloth (b) a plastic ruler (c) a piece of chalk (d) a cotton thread
26. 26.🔮 A big log and a small pebble go into a pond. Which one floats? (a) neither of them (b) the big log (c) the small pebble (d) both of them
27. 27.💧 Dip a plastic ruler into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
28. 28.💧 Which of these lets water climb up it? (a) a steel spoon (b) a piece of foil (c) a glass marble (d) a flower stem
29. 29.🧺 Which of these is needed for the density tower? (a) a mirror (b) turmeric powder (c) a tall clear glass (d) a magnet
30. 30.🔍 Which is the odd one out? (a) a glass marble (b) a metal key (c) an ice-cream stick (d) a ball of clay
31. 31.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) forward (b) it stays still (c) straight down (d) backward
32. 32.🛟 Who should pour the warm water in the dissolving test? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
33. 33.⚖️ 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) sun or shade (b) the time we wait (c) how many drops form
34. 34.🛟 Why should you not over-blow the balloon? (a) it can pop loudly (b) it turns into a kite (c) it changes colour (d) it gets too heavy
35. 35.🧺 Do we need yeast for the water cycle bowl? (a) needed (b) not needed
36. 36.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) the paper clip (b) time to reach the floor (c) the length of the blades
37. 37.🧺 Do we need water for the water cycle bowl? (a) not needed (b) needed
38. 38.🧺 Do we need yeast for the balloon rocket? (a) needed (b) not needed
39. 39.💧 Which change is this: butter going runny? (a) freezing (b) condensation (c) evaporation (d) melting
40. 40.🔍 Which is the odd one out? (a) a ping-pong ball (b) a pebble (c) a coin (d) a steel spoon

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