Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 61 · 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.🔮 What would change if the flower stood in plain water? (a) the flower glows (b) the petals turn red (c) the stem turns blue (d) no colour change
2. 2.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) cooking oil (d) glucose powder
3. 3.🧺 Which of these is needed for the paper helicopter? (a) a battery cell (b) a ruler (c) a magnet (d) yeast
4. 4.True or false: puffed rice does not move to a charged comb. (a) False (b) True
5. 5.True or false: a magnet is needed for the paper bridge. (a) False (b) True
6. 6.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we change it (b) we keep it the same (c) we measure it
7. 7.🫗 Which of these is done by winnowing? (a) tea leaves from tea (b) chaff from wheat grain (c) mud from water (d) bran from wheat flour
8. 8.True or false: a magnet is needed for the coloured flower experiment. (a) True (b) False
9. 9.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
10. 10.🧺 Do we need coins for the paper bridge? (a) needed (b) not needed
11. 11.⚙️ Which of these uses a pulley? (a) a well pulley (b) a spoon lifting a lid (c) a slide (d) a bottle opener
12. 12.🥄 Which of these dissolves slower? (a) sugar in warm water (b) sugar stirred well (c) sugar left unstirred (d) powdered sugar
13. 13.🔍 Which is the odd one out? (a) a zigzag-folded sheet (b) one flat sheet (c) a U-shaped channel (d) rolled paper tubes
14. 14.🧲 Two magnets: north near north. Do they pull together or push apart? (a) push apart (b) pull together
15. 15.🔍 Which layer is on top in the honey-water-oil tower? (a) cooking oil (b) coloured water (c) the spoon (d) honey
16. 16.🔍 Which is the odd one out? (a) chalk powder (b) food colour (c) table salt (d) baking soda
17. 17.💧 Which of these lets water climb up it? (a) a piece of foil (b) a steel spoon (c) a rubber eraser (d) a strip of cloth
18. 18.True or false: turmeric powder is not needed for the water rainbow. (a) True (b) False
19. 19.🧺 Do we need vinegar for the static comb? (a) not needed (b) needed
20. 20.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the same card (b) the way we turn it (c) how full the glass is (d) whether the card stays
21. 21.🧺 Do we need a magnet for the coloured flower experiment? (a) not needed (b) needed
22. 22.🔍 Which is the odd one out? (a) a wooden pencil (b) an aluminium can (c) iron filings (d) a paper sheet
23. 23.🛟 Static from a comb is safe. Which electricity must children never play with? (a) paper bits on a comb (b) a rubbed balloon (c) a rubbed plastic comb (d) plug points at home
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the liquid we test (c) the light we look in (d) the number of drops
25. 25.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? True or false: distance to the paper is the one thing we change. (a) False (b) True
26. 26.⚖️ Fair test — which kind of ball bounces highest? True or false: bounce height is kept the same. (a) True (b) False
27. 27.🍯 Is a glass marble denser or less dense than water? (a) less dense than water (b) denser than water
28. 28.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) a magnet (c) a clear plastic bag (d) a battery cell
29. 29.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
30. 30.🧺 Do we need a battery cell for the coloured flower experiment? (a) needed (b) not needed
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) the kind of plant (b) the time we wait (c) the same kind of bag (d) amount of water drops
32. 32.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a 30 cm ruler (c) a flat table (d) yeast
33. 33.🌱 Is soil needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
34. 34.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the gas froze (c) the balloon got cold (d) an ingredient ran out
35. 35.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.True or false: plain water is an acid. (a) False (b) True
37. 37.🧺 Which of these is not needed for the water cycle bowl? (a) water (b) a big bowl (c) a small cup (d) a balloon
38. 38.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) dark green (c) blue (d) bright red
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) spoons of baking soda (c) the kind of balloon (d) size of the balloon
40. 40.🍯 Is air denser or less dense than water? (a) less dense than water (b) denser than water

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