Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 9 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s science idea. 3. For a fair test: one thing changed, the rest kept the same, one thing measured. 4. For safety: an adult helps, nothing goes in the mouth, no heat, sharp tools or plug points for children.

1. 1.True or false: table salt dissolves in water. (a) True (b) False
2. 2.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
3. 3.🍯 Is air denser or less dense than water? (a) less dense than water (b) denser than water
4. 4.True or false: vinegar is needed for the balloon rocket. (a) False (b) True
5. 5.True or false: a mirror is not needed for the static comb. (a) False (b) True
6. 6.💧 Which change is this: making ice lollies? (a) melting (b) evaporation (c) freezing (d) condensation
7. 7.True or false: black cloth reflects light poorly. (a) False (b) True
8. 8.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same tape is kept the same. (a) False (b) True
9. 9.True or false: a pencil and tape is needed for the pendulum. (a) True (b) False
10. 10.🧺 Do we need a balloon for the density tower? (a) not needed (b) needed
11. 11.🧺 Which of these is not needed for the card-on-a-glass trick? (a) a sink or a bucket (b) turmeric powder (c) a towel (d) a stiff postcard
12. 12.🫧 Which of these is neutral? (a) tamarind water (b) baking soda water (c) lemon juice (d) salt water
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the number of drops (c) the liquid we test (d) the turmeric paper
14. 14.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is what we measure. (a) True (b) False
15. 15.True or false: a magnet is needed for the fizzy balloon. (a) False (b) True
16. 16.True or false: a mirror is not needed for the shadow clock. (a) False (b) True
17. 17.⚖️ Fair test — which paper shape holds the most coins? What do we do with “the shape of the paper”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🔍 Which is the odd one out? (a) salt (b) sugar (c) water (d) soil
19. 19.True or false: a mirror is needed for the density tower. (a) True (b) False
20. 20.⚖️ A child tests plants with and without water, but puts one in the sun and one in a cupboard. Is it a fair test? (a) yes, if done fast (b) only on Sundays (c) yes, it is fair (d) no, two things changed
21. 21.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
22. 22.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) the same string (b) how big we blow it (c) distance it travels
23. 23.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the salt (b) nothing (c) the water (d) the mud
24. 24.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) cotton or cloth (c) a clean glass (d) a balloon
25. 25.⚖️ 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
26. 26.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a tray for spills (b) a funnel or spoon (c) a balloon (d) a magnet
27. 27.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) the lid gets softer (c) a lever boosts your push (d) the spoon is magnetic
28. 28.True or false: chalk to mark shadows is not needed for the shadow clock. (a) True (b) False
29. 29.⚙️ Which simple machine is a ramp? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
30. 30.True or false: lemon juice is an acid. (a) False (b) True
31. 31.🔮 Can the brown writing go back to being invisible? (a) yes, if shaken (b) yes, in the dark (c) no, it stays brown (d) yes, if cooled
32. 32.🧺 Do we need a battery cell for the density tower? (a) not needed (b) needed
33. 33.🧺 Do we need a bowl for making butter? (a) needed (b) not needed
34. 34.True or false: sunlight is not needed for the water cycle bowl. (a) False (b) True
35. 35.True or false: seeds on dry cotton does not sprout. (a) False (b) True
36. 36.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no salt (c) they have no soil (d) they have no water
37. 37.🫗 How do we separate sugar from sugar water? (a) evaporating (b) handpicking (c) sieving (d) filtering
38. 38.🛟 Which scissors should children use to cut the paper? (a) safety scissors (b) gardening shears (c) sharp kitchen shears (d) a paper cutter
39. 39.🔍 Which is the odd one out? (a) cooking oil (b) glucose powder (c) food colour (d) table salt
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is the one thing we change. (a) False (b) True

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