Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 688 · 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 magnet is needed for the density tower. (a) False (b) True
2. 2.🌈 How many colours do we name in a rainbow (VIBGYOR)?
3. 3.True or false: a coin is less dense than water. (a) True (b) False
4. 4.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is the one thing we change. (a) False (b) True
5. 5.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a ruler (c) a balloon (d) a strip of paper
6. 6.True or false: food colour dissolves in water. (a) False (b) True
7. 7.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to win a prize (c) to splash everyone (d) to keep children safe
8. 8.🛟 How should you check if the sugar has dissolved? (a) taste it (b) poke it with a finger (c) look for leftover grains (d) smell it closely
9. 9.🧺 Which of these is needed for the card-on-a-glass trick? (a) turmeric powder (b) a balloon (c) a glass of water (d) yeast
10. 10.🧺 Which of these is needed for the water cycle bowl? (a) yeast (b) a big bowl (c) a battery cell (d) a mirror
11. 11.🧺 Which of these is not needed for the balloon rocket? (a) a long string (b) vinegar (c) two chairs (d) a drinking straw
12. 12.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a balloon (c) bright sunlight (d) a sheet of white paper
13. 13.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) never look at the Sun (c) look at it in a mirror (d) stare at the Sun
14. 14.🔮 Predict: you squeeze an empty plastic bottle with its cap screwed on tight. Why is it hard? (a) the bottle is magnetic (b) the cap is sticky (c) air inside pushes back (d) water is hiding there
15. 15.🧺 Do we need yeast for the density tower? (a) not needed (b) needed
16. 16.🧺 Which of these is needed for the density tower? (a) a balloon (b) a magnet (c) honey (d) turmeric powder
17. 17.True or false: a crumpled paper ball falls slowly through the air. (a) True (b) False
18. 18.True or false: two chairs is not needed for the balloon rocket. (a) True (b) False
19. 19.⚖️ 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 size of the bowl
20. 20.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.🧺 Do we need a drinking straw for the balloon rocket? (a) needed (b) not needed
22. 22.🧺 Do we need a sink or a bucket for the card-on-a-glass trick? (a) needed (b) not needed
23. 23.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the slope of the string”? (a) we measure it (b) we keep it the same (c) we change it
24. 24.🧺 Do we need small test objects for the float-or-sink test? (a) not needed (b) needed
25. 25.🔮 Predict: you add two more paper clips. How does it fall? (a) slower (b) it floats up (c) faster (d) it stops in the air
26. 26.True or false: a mirror is needed for the balloon rocket. (a) False (b) True
27. 27.🛟 Does a dry leaf float or sink in water? (a) floats (b) sinks
28. 28.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a stiff postcard (d) a mirror
29. 29.⚖️ 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 what we measure. (a) True (b) False
30. 30.🧺 Which of these is not needed for the coloured flower experiment? (a) a white flower (b) a glass of water (c) yeast (d) food colour
31. 31.🧺 Do we need yeast for the float-or-sink test? (a) needed (b) not needed
32. 32.⚖️ 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 change it (c) we keep it the same
33. 33.🔍 Which is the odd one out? (a) snow turning to water (b) butter going runny (c) ice becoming water (d) a puddle drying up
34. 34.True or false: a battery cell is needed for the density tower. (a) False (b) True
35. 35.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the length of the stem is what we measure. (a) True (b) False
36. 36.🔍 You drop a coin into a tub of water. What do you see? (a) it sinks (b) it dissolves (c) it bounces up (d) it floats
37. 37.🔍 Which is the odd one out? (a) cooking oil (b) sugar (c) food colour (d) baking soda
38. 38.🥄 Does powdered sugar dissolve faster or slower? (a) faster (b) slower
39. 39.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is what we measure? (a) the cling film cover (b) the amount of water (c) how many drops form (d) the size of the bowl
40. 40.🔍 Which is the odd one out? (a) an ice cube (b) a pebble (c) a cork (d) cooking oil

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