Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 233 · 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 is the odd one out? (a) food colour (b) sugar (c) sawdust (d) baking soda
2. 2.True or false: an ice cube is less dense than water. (a) True (b) False
3. 3.🧺 Do we need a few hours of waiting for the coloured flower experiment? (a) needed (b) not needed
4. 4.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we change it (b) we keep it the same (c) we measure it
5. 5.True or false: yeast is not needed for the balloon rocket. (a) True (b) False
6. 6.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a stiff postcard (c) a mirror (d) a towel
7. 7.🍯 Which of these is denser than water? (a) cooking oil (b) an ice cube (c) a coin (d) a cork
8. 8.🌼 Why do the petals keep pulling water up the stem? (a) petals are magnetic (b) petals like colour (c) petals lose water to air (d) the stem is hot
9. 9.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
10. 10.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🧺 Which of these is not needed for the float-or-sink test? (a) a towel for spills (b) a balloon (c) a tub of water (d) a results table
12. 12.🧺 Which of these is needed for the water rainbow? (a) a clear glass of water (b) a balloon (c) turmeric powder (d) a mirror
13. 13.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of colour”? (a) we change it (b) we measure it (c) we keep it the same
14. 14.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) time to reach the floor (b) the kind of paper (c) the length of the blades
15. 15.🧺 Which of these is not needed for the water cycle bowl? (a) water (b) a mirror (c) a big bowl (d) a small cup
16. 16.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we change it (b) we measure it (c) we keep it the same
17. 17.🛟 Where should you do the card-and-glass trick? (a) over a sink or bucket (b) near a plug point (c) on a bed (d) over a laptop
18. 18.💧 Which change is this: drops under a pot lid? (a) evaporation (b) freezing (c) condensation (d) melting
19. 19.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we measure it (b) we change it (c) we keep it the same
20. 20.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we change it (b) we keep it the same (c) we measure it
21. 21.🔍 Which is the odd one out? (a) a pond icing over (b) making ice lollies (c) water becoming ice (d) wet clothes drying
22. 22.🚁 Dropped from a raised hand, does a coin fall slowly or fast? (a) falls slowly (b) falls fast
23. 23.🔍 What do you see after pouring honey, water and oil into one glass? (a) three separate layers (b) the glass gets hot (c) one mixed colour (d) bubbles of gas
24. 24.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is what we measure. (a) False (b) True
25. 25.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: the room it stands in is what we measure. (a) True (b) False
26. 26.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it dissolves (b) it can float (c) it turns to stone (d) it sinks faster
27. 27.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a magnet (b) a pencil (c) a paper clip (d) a ruler
28. 28.🚁 Dropped from a raised hand, does a steel spoon fall slowly or fast? (a) falls fast (b) falls slowly
29. 29.🥄 Which of these dissolves slower? (a) powdered sugar (b) sugar in icy water (c) sugar in warm water (d) sugar stirred well
30. 30.🧺 Which of these is not needed for the density tower? (a) a magnet (b) honey (c) water with food colour (d) cooking oil
31. 31.☀️ What is white sunlight really made of? (a) many colours mixed (b) only yellow light (c) tiny bits of dust (d) tiny drops of water
32. 32.📘 What do we call water with sugar dissolved in it? (a) a crystal (b) a solution (c) a rainbow (d) a magnet
33. 33.True or false: a battery cell is not needed for the water rainbow. (a) True (b) False
34. 34.💧 Which of these is freezing? (a) drops on a cold glass (b) a misty bathroom mirror (c) ice becoming water (d) water becoming ice
35. 35.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) the cold water (d) a magnet
36. 36.🥛 Does a fridge magnet work by air pressure or by magnetism? (a) magnetism (b) air pressure
37. 37.⚖️ 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 kind of flower (b) the length of the stem (c) time for colour to show (d) the amount of colour
38. 38.🧺 Do we need a long string for the balloon rocket? (a) not needed (b) needed
39. 39.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes backward (b) goes forward
40. 40.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the kind of sugar is kept the same. (a) True (b) False

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