Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 100 · 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.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
2. 2.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) whether the card stays (b) the same card (c) how full the glass is
3. 3.🚢 Why can a heavy steel ship float on the sea? (a) it has a magnet (b) sea water is warm (c) its hollow shape (d) steel is very light
4. 4.🌉 Which of these makes a strong bridge? (a) a wet flat sheet (b) one flat sheet (c) a U-shaped channel (d) a torn flat sheet
5. 5.🚀 Which of these goes backward? (a) the rowing boat (b) the rocket (c) the balloon (d) air from the balloon
6. 6.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) cotton or cloth (c) a clean glass (d) a balloon
7. 7.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a glass of water (c) a battery cell (d) a few hours of waiting
8. 8.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? True or false: the same table is what we measure. (a) False (b) True
9. 9.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same string (b) distance it travels (c) the same tape (d) how big we blow it
10. 10.🥄 Does sugar left unstirred dissolve faster or slower? (a) faster (b) slower
11. 11.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a mirror (b) a tall clear glass (c) a spoon (d) water with food colour
12. 12.🛟 What should you wear for a long time in the hot sun? (a) a raincoat (b) a woollen sweater (c) nothing on your head (d) a cap or hat
13. 13.🔍 Which is the odd one out? (a) wet hair drying (b) sweat drying on skin (c) wet clothes drying (d) drops under a pot lid
14. 14.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
15. 15.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 10 cm (b) 20 cm (c) 5 cm (d) 40 cm
16. 16.True or false: turmeric powder is needed for the paper helicopter. (a) False (b) True
17. 17.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a funnel or spoon (b) a balloon (c) a comb (d) an empty bottle
18. 18.🫧 Which of these is an acid? (a) baking soda water (b) lemon juice (c) detergent water (d) salt water
19. 19.🔦 Is clean water opaque, translucent or transparent? (a) translucent (b) opaque (c) transparent
20. 20.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) coins as the load (c) turmeric powder (d) a small paper cup
21. 21.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
22. 22.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the same stick is kept the same. (a) False (b) True
23. 23.🔦 Which of these is translucent? (a) a book (b) butter paper (c) your hand (d) clean water
24. 24.🥄 Does sugar stirred well dissolve faster or slower? (a) slower (b) faster
25. 25.🧲 Which of these is pulled by a magnet? (a) an iron screw (b) a plastic ruler (c) a cotton cloth (d) a rubber eraser
26. 26.🥄 Which of these does not dissolve in water? (a) glucose powder (b) chalk powder (c) baking soda (d) sugar
27. 27.🎈 Why does the balloon rocket move along the string? (a) escaping air pushes it (b) a magnet pulls it (c) the straw is heavy (d) the string pulls it
28. 28.🧺 Three of these are needed for the static comb. Which one is NOT needed? (a) a balloon (b) tiny paper bits (c) a plastic comb (d) yeast
29. 29.🪴 Which part of a plant does this job: carry water upward? (a) stem (b) roots (c) flower (d) leaves
30. 30.🔍 Which is the odd one out? (a) aluminium foil (b) a dull brick (c) still clear water (d) a mirror
31. 31.⚖️ Fair test — which paper shape holds the most coins? Which of these is the one thing we change? (a) the gap between books (b) the kind of coins (c) the kind of paper (d) the shape of the paper
32. 32.🛟 While watching shadows outdoors, what must you never do? (a) mark with chalk (b) look straight at the Sun (c) sit in the shade (d) wear a cap
33. 33.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns all red (c) the rainbow fades (d) it turns brighter
34. 34.🧺 Do we need yeast for the balloon rocket? (a) not needed (b) needed
35. 35.True or false: an empty thread reel is not needed for the thread-reel pulley. (a) False (b) True
36. 36.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) a few days (c) moong seeds (d) yeast
37. 37.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a balloon (c) lemon juice (d) a cotton bud
38. 38.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the size of the bowl (b) the amount of water (c) sun or shade (d) how many drops form
39. 39.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? Which of these is what we measure? (a) paper bits picked up (b) the same hair (c) the paper bit size (d) the same comb
40. 40.🎈 Why does the balloon blow up? (a) vinegar is hot (b) outside air gets in (c) the bottle shrinks (d) gas is made inside

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