Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 869 · 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 less dense than water? (a) cooking oil (b) a pebble (c) a coin (d) very salty water
2. 2.🚁 Why does the paper helicopter fall slowly? (a) a magnet holds it (b) the floor pushes it (c) it has no weight (d) air pushes on its blades
3. 3.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a pencil (c) a paper clip (d) a battery cell
4. 4.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a pencil (b) yeast (c) safety scissors (d) a ruler
5. 5.⚖️ 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 keep it the same (c) we change it
6. 6.🫗 Why does cooking oil float on top of water? (a) oil is sticky (b) oil is less dense (c) oil is heavier (d) oil is hot
7. 7.🔮 Predict: you use a rough, thick string instead of a smooth one. (a) less friction (b) no change at all (c) more friction, less far (d) it goes faster
8. 8.True or false: a battery cell is not needed for the water rainbow. (a) False (b) True
9. 9.⚖️ 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 same glass (b) the same three liquids (c) the order of the layers (d) the order of pouring
10. 10.True or false: a vacuum cleaner works by air pressure. (a) True (b) False
11. 11.💧 Which change is this: a misty bathroom mirror? (a) freezing (b) melting (c) condensation (d) evaporation
12. 12.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) a balloon (c) vinegar (d) a long string
13. 13.🍯 Is a cork denser or less dense than water? (a) denser than water (b) less dense than water
14. 14.🛟 Does a glass marble float or sink in water? (a) sinks (b) floats
15. 15.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a few hours of waiting (c) a battery cell (d) a glass of water
16. 16.⚖️ 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 kind of clay (b) the amount of clay (c) the tub of water (d) the shape of the clay
17. 17.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) a magnet (d) air pushing up
18. 18.🛟 Which is a safe rule for the balloon rocket? (a) put string round a neck (b) blow it till it bursts (c) aim it at your friend (d) keep it away from faces
19. 19.🥄 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
20. 20.🔮 A big log and a small pebble go into a pond. Which one floats? (a) both of them (b) neither of them (c) the big log (d) the small pebble
21. 21.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is what we measure. (a) True (b) False
22. 22.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) powdered sugar (b) neither of them (c) both the same (d) the sugar cube
23. 23.True or false: a tall clear glass is not needed for the density tower. (a) True (b) False
24. 24.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it melts (c) it turns blue (d) it sinks
25. 25.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card stays on (b) the water turns to ice (c) the card flies away (d) the glass breaks
26. 26.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a results table (b) a tub of water (c) a towel for spills (d) a battery cell
27. 27.🧺 Do we need a mirror for the float-or-sink test? (a) needed (b) not needed
28. 28.💧 Which change is this: butter going runny? (a) evaporation (b) condensation (c) melting (d) freezing
29. 29.🧊 Why does an ice cube float on water? (a) ice is very cold (b) water is sticky (c) ice is less dense (d) ice is magnetic
30. 30.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the slope of the string is kept the same. (a) False (b) True
31. 31.True or false: the swimmer goes forward. (a) True (b) False
32. 32.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) a towel (c) a mirror (d) a stiff postcard
33. 33.🌈 Why does sunlight make a rainbow through a glass of water? (a) the paper makes colours (b) water splits the light (c) the glass is painted (d) the water is coloured
34. 34.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) the water increases (b) some water evaporates (c) it turns to ice (d) it turns to salt
35. 35.🔮 Predict: you gently drop a coin into the tower. Where does it end up? (a) on top of the oil (b) in the oil layer (c) in the water layer (d) at the very bottom
36. 36.🚀 Which of these goes forward? (a) the swimmer (b) water from the oars (c) water a swimmer pushes (d) gas from the rocket
37. 37.⚖️ 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 keep it the same (b) we change it (c) we measure it
38. 38.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a strip of cloth (c) a piece of foil (d) a glass marble
39. 39.💧 Dip a strip of cloth into coloured water. Does the water climb up it? (a) water climbs up it (b) water does not climb
40. 40.🥄 Which of these dissolves faster? (a) a big sugar cube (b) sugar in icy water (c) sugar left unstirred (d) sugar stirred well

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