Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 532 · 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.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) in the water layer (b) on top of the oil (c) in the oil layer (d) at the very bottom
2. 2.True or false: a pebble floats on water. (a) True (b) False
3. 3.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) a sheet of white paper (c) a clear glass of water (d) a magnet
4. 4.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is the one thing we change? (a) the amount of clay (b) the kind of clay (c) whether it floats (d) the shape of the clay
5. 5.🔮 A big log and a small pebble go into a pond. Which one floats? (a) neither of them (b) both of them (c) the big log (d) the small pebble
6. 6.🧺 Which of these is not needed for the density tower? (a) cooking oil (b) water with food colour (c) a mirror (d) honey
7. 7.🧺 Which of these is not needed for the card-on-a-glass trick? (a) turmeric powder (b) a towel (c) a stiff postcard (d) a glass of water
8. 8.🧺 Do we need cooking oil for the density tower? (a) needed (b) not needed
9. 9.🧺 Which of these is not needed for the dissolving test? (a) a teaspoon (b) warm water (c) sugar (d) honey
10. 10.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) a few hours of waiting (b) a white flower (c) a glass of water (d) turmeric powder
11. 11.True or false: a balloon is not needed for the dissolving test. (a) True (b) False
12. 12.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same white paper (b) the same window (c) the time of day (d) brightness of rainbow
13. 13.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
14. 14.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the size of the bowl is what we measure. (a) True (b) False
15. 15.🧺 Which of these is needed for the coloured flower experiment? (a) turmeric powder (b) a few hours of waiting (c) a mirror (d) a magnet
16. 16.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) sunlight (b) ice cubes (c) cling film (d) a balloon
17. 17.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is what we measure? (a) the water temperature (b) time to dissolve (c) the amount of sugar (d) the stirring
18. 18.🧺 Which of these is not needed for the water rainbow? (a) a clear glass of water (b) a sunny window (c) bright sunlight (d) a mirror
19. 19.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is kept the same. (a) True (b) False
20. 20.🛟 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
21. 21.🥛 Which of these works by magnetism? (a) a medicine dropper (b) a magnetic pin holder (c) a bicycle pump (d) a drinking straw
22. 22.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a suction hook (c) a fridge magnet (d) a compass needle
23. 23.🧺 Do we need honey for the density tower? (a) needed (b) not needed
24. 24.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns brighter (c) it turns all red (d) the rainbow fades
25. 25.🛟 Which rule keeps you safe when working with sunlight? (a) stare at the Sun (b) look at it in a mirror (c) never look at the Sun (d) look at it through glass
26. 26.🧺 Do we need a balloon for the float-or-sink test? (a) needed (b) not needed
27. 27.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) near a plug point (c) on a bed (d) over a sink or bucket
28. 28.🍯 Which of these is denser than water? (a) a ping-pong ball (b) honey (c) cooking oil (d) an ice cube
29. 29.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) on top of the oil (c) under the honey (d) in the honey layer
30. 30.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is kept the same. (a) False (b) True
31. 31.⚖️ 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 measure it (c) we keep it the same
32. 32.🥛 Which of these works by magnetism? (a) a suction hook (b) a medicine dropper (c) a fridge magnet (d) a bicycle pump
33. 33.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the stirring (b) time to dissolve (c) the water temperature
34. 34.🌈 How many colours do we name in a rainbow (VIBGYOR)?
35. 35.🍯 Which of these is less dense than water? (a) very salty water (b) honey (c) a pebble (d) an ice cube
36. 36.🥛 Which of these works by air pressure? (a) a drinking straw (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle
37. 37.🛟 Does a coin float or sink in water? (a) floats (b) sinks
38. 38.True or false: yeast is needed for the coloured flower experiment. (a) False (b) True
39. 39.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the order of pouring (b) how much of each liquid (c) the same glass (d) the same three liquids
40. 40.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a towel (b) a stiff postcard (c) a battery cell (d) a sink or a bucket

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