Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 542 · 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 of these works by air pressure? (a) a magnetic pin holder (b) a compass needle (c) a magnetic chess set (d) a bicycle pump
2. 2.🌼 How does coloured water reach the petals? (a) it rains on them (b) through the air (c) through tiny stem tubes (d) it is sprayed on
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.🛟 Which of these sinks in water? (a) a coin (b) a feather (c) a piece of thermocol (d) an ice cube
5. 5.🌈 In a rainbow in the sky, which colour is on the outside (top) edge? (a) red (b) blue (c) green (d) violet
6. 6.🧺 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) turmeric powder (d) a results table
7. 7.True or false: ice becoming water is melting. (a) False (b) True
8. 8.🧺 Which of these is not needed for the density tower? (a) honey (b) a magnet (c) water with food colour (d) a tall clear glass
9. 9.🧺 Do we need yeast for the water rainbow? (a) not needed (b) needed
10. 10.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) a clock or timer (b) cold water (c) a balloon (d) warm water
11. 11.🥛 Does a vacuum cleaner work by air pressure or by magnetism? (a) magnetism (b) air pressure
12. 12.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) yeast (c) a tall clear glass (d) a spoon
13. 13.🧺 Which of these is not needed for the paper helicopter? (a) a pencil (b) a paper clip (c) a battery cell (d) a ruler
14. 14.True or false: a glass marble is denser than water. (a) False (b) True
15. 15.🛟 Why should only a grown-up handle any hot water? (a) hot water is magnetic (b) hot water can scald (c) it changes colour (d) hot water is heavy
16. 16.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) False (b) True
17. 17.True or false: a pencil is not needed for the paper helicopter. (a) False (b) True
18. 18.🔮 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) water is hiding there (d) air inside pushes back
19. 19.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a glass of water (c) a balloon (d) a towel
21. 21.🔍 Which is the odd one out? (a) a fluff of cotton (b) a paper helicopter (c) an open sheet of paper (d) a coin
22. 22.🛟 Does an iron nail float or sink in water? (a) floats (b) sinks
23. 23.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar stirred well (c) sugar in icy water (d) sugar in warm water
24. 24.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
25. 25.True or false: a battery cell is needed for the float-or-sink test. (a) False (b) True
26. 26.🔍 Which is the odd one out? (a) a feather (b) a cork (c) an ice-cream stick (d) a ball of clay
27. 27.💧 Why do water drops form on the outside of a glass of ice water? (a) the glass sweats (b) ice escapes the glass (c) the glass leaks (d) vapour in air cools
28. 28.🥛 Which of these works by magnetism? (a) a suction hook (b) a vacuum cleaner (c) a medicine dropper (d) a fridge magnet
29. 29.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) the card gets wet (c) little air left inside (d) water is heavier
30. 30.🧺 Do we need cold water for the dissolving test? (a) needed (b) not needed
31. 31.🔍 What do you see after pouring honey, water and oil into one glass? (a) three separate layers (b) one mixed colour (c) bubbles of gas (d) the glass gets hot
32. 32.🧺 Which of these is not needed for the balloon rocket? (a) a long string (b) a balloon (c) sticky tape (d) yeast
33. 33.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) yeast (b) a white flower (c) a few hours of waiting (d) a glass of water
34. 34.🧺 Do we need a mirror for the coloured flower experiment? (a) needed (b) not needed
35. 35.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a sink or a bucket (c) a stiff postcard (d) a battery cell
36. 36.🌈 How many colours do we name in a rainbow (VIBGYOR)?
37. 37.🧊 Why does an ice cube float on water? (a) ice is magnetic (b) ice is less dense (c) water is sticky (d) ice is very cold
38. 38.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it changes colour (c) it gets too heavy (d) it can pop loudly
39. 39.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) the water temperature (b) the amount of sugar (c) the stirring (d) the amount of water
40. 40.🧺 Which of these is needed for the density tower? (a) a spoon (b) a balloon (c) turmeric powder (d) a magnet

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