Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 927 · 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.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is magnetic (b) it is hotter (c) it will not break (d) it is heavier
2. 2.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) a shadow of ice (b) a magnet (c) snow falling (d) a small rainbow
3. 3.True or false: powdered sugar dissolves slower. (a) False (b) True
4. 4.🥄 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🧺 Do we need a tub of water for the float-or-sink test? (a) not needed (b) needed
6. 6.🧺 Do we need two chairs for the balloon rocket? (a) needed (b) not needed
7. 7.🧺 Which of these is not needed for the paper helicopter? (a) a strip of paper (b) a pencil (c) a ruler (d) a battery cell
8. 8.💧 What happens to water vapour when it touches the cold cling film? (a) it disappears (b) it turns to smoke (c) it turns to salt (d) it turns to drops
9. 9.🔍 Which is the odd one out? (a) an ice-cream stick (b) a ball of clay (c) a steel spoon (d) a pebble
10. 10.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) a magnetic pin holder (b) a bicycle pump (c) a medicine dropper (d) a drinking straw
12. 12.🧺 Do we need cold water for the dissolving test? (a) needed (b) not needed
13. 13.🔮 Predict: you keep adding sugar to a small glass of water and stirring. What happens in the end? (a) all of it dissolves (b) the water turns solid (c) some stays undissolved (d) the sugar turns to salt
14. 14.🧺 Which of these is needed for the density tower? (a) water with food colour (b) turmeric powder (c) yeast (d) a battery cell
15. 15.True or false: honey is needed for the density tower. (a) True (b) False
16. 16.True or false: a magnetic pin holder works by air pressure. (a) True (b) False
17. 17.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) the flat sheet (b) a sheet of glass (c) neither of them (d) the crumpled ball
18. 18.🛟 Who should trim the flower stem? (a) anyone, without looking (b) a pet (c) a grown-up (d) a toddler
19. 19.💧 Which change is this: a pond icing over? (a) melting (b) condensation (c) freezing (d) evaporation
20. 20.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is the one thing we change. (a) True (b) False
21. 21.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the length of the stem (b) time for colour to show (c) the amount of colour (d) the kind of flower
22. 22.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is what we measure. (a) False (b) True
23. 23.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) distance it travels (b) the same tape (c) how big we blow it
24. 24.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a results table (c) a towel for spills (d) a mirror
25. 25.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a magnet (c) a tub of water (d) a towel for spills
26. 26.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a battery cell (b) a tub of water (c) a results table (d) small test objects
27. 27.🌼 Why do the petals keep pulling water up the stem? (a) petals like colour (b) the stem is hot (c) petals lose water to air (d) petals are magnetic
28. 28.True or false: a glass marble is denser than water. (a) False (b) True
29. 29.🛟 Which rule keeps the density tower experiment safe? (a) taste each layer (b) throw the glass (c) do not lick the spoon (d) pour it on the floor
30. 30.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) the order of pouring (b) the same glass (c) the same three liquids (d) the order of the layers
31. 31.🔍 Which is the odd one out? (a) honey (b) a coin (c) a glass marble (d) air
32. 32.🥚 A fresh egg sinks in plain water. What makes it float? (a) lots of salt stirred in (b) more plain water (c) a few ice cubes (d) a little shaking
33. 33.🛟 What should you do with popped balloon pieces? (a) keep them in your mouth (b) throw them away safely (c) chew them (d) give them to a baby
34. 34.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.🍯 Which of these is less dense than water? (a) a glass marble (b) a coin (c) an ice cube (d) very salty water
36. 36.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is the one thing we change. (a) False (b) True
37. 37.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a paper towel (c) a plastic ruler (d) a steel spoon
38. 38.True or false: honey is not needed for the dissolving test. (a) True (b) False
39. 39.🌈 In VIBGYOR, what number colour is violet?
40. 40.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: time to reach the floor is what we measure. (a) False (b) True

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