Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 36 · 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.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) water with food colour (c) a tall clear glass (d) a balloon
2. 2.True or false: honey is denser than water. (a) False (b) True
3. 3.🌊 What pushes a floating cork upward? (a) the tub (b) the water (c) the air above (d) the cork itself
4. 4.🛟 Which of these sinks in water? (a) a ping-pong ball (b) an ice-cream stick (c) a cork (d) a ball of clay
5. 5.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the flower floats away (c) the petals turn bluish (d) the stem turns to ice
6. 6.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) forward (c) it stays still (d) backward
7. 7.True or false: yeast is not needed for the water rainbow. (a) False (b) True
8. 8.🔍 Which is the odd one out? (a) butter going runny (b) ice becoming water (c) drops on a cold glass (d) snow turning to water
9. 9.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the same glass is kept the same. (a) False (b) True
10. 10.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a mirror (b) a small cup (c) sunlight (d) a big bowl
11. 11.🚁 Dropped from a raised hand, does a stone fall slowly or fast? (a) falls fast (b) falls slowly
12. 12.🔍 Which is the odd one out? (a) water becoming ice (b) a pond icing over (c) dew on morning grass (d) making ice lollies
13. 13.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes forward (b) goes backward
14. 14.🌧️ The drops falling back into the bowl are like which part of the real water cycle? (a) wind (b) rain (c) sunshine (d) lightning
15. 15.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is the one thing we change? (a) whether the card stays (b) the same glass (c) the same card (d) how full the glass is
16. 16.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a small rainbow (b) a magnet (c) snow falling (d) a shadow of ice
17. 17.🍯 Which of these is less dense than water? (a) a coin (b) air (c) a glass marble (d) a pebble
18. 18.🔍 Which is the odd one out? (a) honey (b) a ping-pong ball (c) a cork (d) air
19. 19.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.🔮 What would change if the flower stood in plain water? (a) the stem turns blue (b) no colour change (c) the flower glows (d) the petals turn red
21. 21.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a stiff postcard (b) a towel (c) a sink or a bucket (d) a balloon
22. 22.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is the one thing we change. (a) True (b) False
23. 23.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is what we measure. (a) False (b) True
24. 24.📘 What is it called when water climbs up thin tubes or paper by itself? (a) evaporation (b) capillary action (c) magnetism (d) melting
25. 25.💧 Which of these is evaporation? (a) wet hair drying (b) ice becoming water (c) drops on a cold glass (d) butter going runny
26. 26.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to ice (b) some water evaporates (c) it turns to salt (d) the water increases
27. 27.🧺 Which of these is not needed for the coloured flower experiment? (a) a glass of water (b) a battery cell (c) food colour (d) a few hours of waiting
28. 28.True or false: a magnet is not needed for the water cycle bowl. (a) True (b) False
29. 29.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns all red (c) it floats away (d) it turns brighter
30. 30.🧺 Do we need food colour for the coloured flower experiment? (a) not needed (b) needed
31. 31.True or false: a paper towel lets water climb up it. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) food colour (b) table salt (c) sand (d) baking soda
33. 33.🥄 Which of these does not dissolve in water? (a) sugar (b) food colour (c) chalk powder (d) baking soda
34. 34.🧺 Which of these is needed for the float-or-sink test? (a) a battery cell (b) a balloon (c) a towel for spills (d) a mirror
35. 35.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
36. 36.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) the amount of colour (b) time for colour to show (c) the kind of flower (d) the room it stands in
37. 37.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same white paper”? (a) we keep it the same (b) we measure it (c) we change it
38. 38.True or false: a paper clip is not needed for the paper helicopter. (a) False (b) True
39. 39.🌈 In VIBGYOR, what number colour is blue?
40. 40.🛟 What should you do with wet floors after the experiment? (a) wipe them dry (b) leave them wet (c) pour more water (d) slide on them

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