Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 931 · 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 is denser than water? (a) cooking oil (b) honey (c) a cork (d) an ice cube
2. 2.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is what we measure. (a) False (b) True
3. 3.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a long string (b) a balloon (c) two chairs (d) turmeric powder
4. 4.⚖️ 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 order of the layers”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.🧺 Do we need a mirror for the density tower? (a) not needed (b) needed
6. 6.⚖️ 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 change it (b) we keep it the same (c) we measure it
7. 7.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
8. 8.🧺 Do we need turmeric powder for the water cycle bowl? (a) needed (b) not needed
9. 9.True or false: a coin is less dense than water. (a) True (b) False
10. 10.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the amount of colour is what we measure. (a) True (b) False
11. 11.🌊 What pushes a floating cork upward? (a) the water (b) the air above (c) the cork itself (d) the tub
12. 12.🧺 Which of these is needed for the balloon rocket? (a) turmeric powder (b) vinegar (c) a mirror (d) a long string
13. 13.🧺 Which of these is needed for the float-or-sink test? (a) a battery cell (b) a balloon (c) a results table (d) turmeric powder
14. 14.🔍 Which is the odd one out? (a) wet hair drying (b) sweat drying on skin (c) wet clothes drying (d) ice becoming water
15. 15.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) look at it in a mirror (c) stare at the Sun (d) never look at the Sun
17. 17.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) True (b) False
18. 18.🍯 Is honey denser or less dense than water? (a) less dense than water (b) denser than water
19. 19.⚖️ 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 order of pouring”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a drinking straw (d) a magnetic chess set
21. 21.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the cling film cover”? (a) we change it (b) we measure it (c) we keep it the same
22. 22.⚖️ 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 change it (c) we measure it
23. 23.🍯 Is an ice cube denser or less dense than water? (a) less dense than water (b) denser than water
24. 24.True or false: warm water is not needed for the dissolving test. (a) False (b) True
25. 25.☀️ What is white sunlight really made of? (a) tiny drops of water (b) many colours mixed (c) tiny bits of dust (d) only yellow light
26. 26.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water is heavy (c) hot water is magnetic (d) hot water can scald
27. 27.🔍 Which is the odd one out? (a) a pebble (b) cooking oil (c) a glass marble (d) honey
28. 28.🛟 Who should pour the warm water in the dissolving test? (a) a friend who is running (b) nobody needs to (c) a grown-up (d) the youngest child
29. 29.🧺 Do we need small test objects for the float-or-sink test? (a) not needed (b) needed
30. 30.🌈 In a rainbow in the sky, which colour is on the inside (bottom) edge? (a) orange (b) red (c) yellow (d) violet
31. 31.🧺 Do we need bright sunlight for the water rainbow? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) turmeric powder (d) a white flower
33. 33.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we measure it (b) we keep it the same (c) we change it
34. 34.🔍 Which is the odd one out? (a) a bicycle pump (b) a magnetic pin holder (c) a medicine dropper (d) a vacuum cleaner
35. 35.💧 Dip a steel spoon into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
36. 36.🧺 Do we need yeast for the card-on-a-glass trick? (a) needed (b) not needed
37. 37.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a fridge magnet (c) a suction hook (d) a compass needle
38. 38.⚖️ 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 kind of sugar (c) the stirring (d) time to dissolve
39. 39.🛟 Which of these sinks in water? (a) a piece of thermocol (b) a coin (c) an ice cube (d) an empty capped bottle
40. 40.🔍 Which is the odd one out? (a) table salt (b) chalk powder (c) glucose powder (d) sugar

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