Water and Air Experiments Test Worksheet

Science experiments lesson 10: Part 1 test: water and air · Set 854 · 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 not needed for the water rainbow? (a) a sheet of white paper (b) bright sunlight (c) a mirror (d) a sunny window
2. 2.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a sink or a bucket (d) a stiff postcard
3. 3.🧺 Which of these is not needed for the density tower? (a) cooking oil (b) water with food colour (c) turmeric powder (d) a spoon
4. 4.🔮 Predict: you shake oil and water hard in a closed bottle and wait. What happens? (a) they turn to honey (b) they mix for ever (c) they separate again (d) they become solid
5. 5.True or false: vinegar is needed for the balloon rocket. (a) True (b) False
6. 6.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) the sugar cube (b) neither of them (c) powdered sugar (d) both the same
7. 7.🔍 Which is the odd one out? (a) a toy parachute (b) a fluff of cotton (c) a coin (d) a feather
8. 8.🛟 Where is a safe place to drop the helicopter from? (a) from your raised hand (b) a wobbly chair (c) a roof edge (d) a high window ledge
9. 9.🧺 Do we need a battery cell for the density tower? (a) needed (b) not needed
10. 10.🧺 Do we need a magnet for the balloon rocket? (a) needed (b) not needed
11. 11.🍯 Is cooking oil denser or less dense than water? (a) denser than water (b) less dense than water
12. 12.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.True or false: a balloon is needed for the water rainbow. (a) False (b) True
14. 14.True or false: ice cubes is not needed for the water cycle bowl. (a) True (b) False
15. 15.⚖️ 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 same three liquids”? (a) we change it (b) we measure it (c) we keep it the same
16. 16.🛟 Does a ball of clay float or sink in water? (a) floats (b) sinks
17. 17.True or false: a magnet is needed for the float-or-sink test. (a) False (b) True
18. 18.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a towel for spills (b) a mirror (c) small test objects (d) a tub of water
19. 19.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is the one thing we change. (a) True (b) False
20. 20.🧊 Why does an ice cube float on water? (a) ice is less dense (b) ice is very cold (c) ice is magnetic (d) water is sticky
21. 21.True or false: water with food colour is needed for the density tower. (a) False (b) True
22. 22.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to make it magnetic (b) to stop the spinning (c) to make it fall slower (d) to weigh down the bottom
23. 23.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a battery cell (c) a paper clip (d) a strip of paper
24. 24.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it vanished for ever (b) it spread in the water (c) it sank as sand (d) it became air
25. 25.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it turns all red (b) it floats away (c) it turns brighter (d) the rainbow fades
26. 26.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) a big bowl (b) a mirror (c) ice cubes (d) cling film
27. 27.True or false: a magnetic pin holder works by air pressure. (a) False (b) True
28. 28.🧺 Do we need a ruler for the paper helicopter? (a) needed (b) not needed
29. 29.⚖️ 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) whether it floats (c) the tub of water (d) the shape of the clay
30. 30.🔮 Predict: you add two more paper clips. How does it fall? (a) faster (b) it stops in the air (c) slower (d) it floats up
31. 31.🥤 Why does juice go up a drinking straw when you sip? (a) the straw is magnetic (b) air pushes it up (c) juice likes plastic (d) the straw is hot
32. 32.🚢 Why can a heavy steel ship float on the sea? (a) it has a magnet (b) steel is very light (c) sea water is warm (d) its hollow shape
33. 33.True or false: a magnet is needed for the balloon rocket. (a) False (b) True
34. 34.True or false: a towel is needed for the card-on-a-glass trick. (a) True (b) False
35. 35.True or false: turmeric powder is not needed for the density tower. (a) False (b) True
36. 36.🔮 Why do we try the card trick over a sink or a bucket? (a) to grow plants (b) to cool the glass (c) to catch any spills (d) to make it rain
37. 37.True or false: a battery cell is needed for the coloured flower experiment. (a) True (b) False
38. 38.🌼 Why do the petals keep pulling water up the stem? (a) petals lose water to air (b) petals like colour (c) the stem is hot (d) petals are magnetic
39. 39.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to splash everyone (b) to win a prize (c) to hide the corks (d) to keep children safe
40. 40.🛟 Why should the glass of water stand on a steady, flat place? (a) so it turns blue (b) so it gets hot (c) so the Sun moves (d) so it does not fall

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids