Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 106 · 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 happens if a cloud covers the Sun during the rainbow experiment? (a) the rainbow fades (b) it turns all red (c) it turns brighter (d) it floats away
2. 2.🥛 Which of these works by magnetism? (a) a magnetic pin holder (b) a vacuum cleaner (c) a medicine dropper (d) a bicycle pump
3. 3.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same funnel (b) the same glass (c) how clear the water is (d) the amount poured
4. 4.🫗 How do we separate husk from rice grain? (a) filtering (b) sieving (c) winnowing (d) evaporating
5. 5.⚡ A rubbed comb is held near a steel spoon. What happens? (a) jumps to the comb (b) does not move
6. 6.🧺 Do we need a string for the pendulum? (a) needed (b) not needed
7. 7.🌈 Why does sunlight make a rainbow through a glass of water? (a) the water is coloured (b) the paper makes colours (c) water splits the light (d) the glass is painted
8. 8.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) time for colour to show (b) the kind of flower (c) the room it stands in (d) the amount of colour
9. 9.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? True or false: the amount of water is kept the same. (a) True (b) False
10. 10.🛟 What should you do with leftover materials at the end? (a) clean up safely (b) taste them (c) leave them out (d) hide them
11. 11.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: which side goes down is what we measure. (a) True (b) False
12. 12.🚀 In “push back, move forward”, which way does the rocket go? (a) goes forward (b) goes backward
13. 13.🧺 Do we need a balloon for the shadow clock? (a) not needed (b) needed
14. 14.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they freeze (b) they become magnets (c) they float apart (d) they react
15. 15.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) moong seeds (c) a small bowl (d) a battery cell
16. 16.🧺 Which of these is not needed for making butter? (a) a magnet (b) fresh cream (c) cold water to rinse (d) a timer
17. 17.True or false: yeast is needed for the coloured flower experiment. (a) False (b) True
18. 18.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) water (c) a mirror (d) lemon juice
19. 19.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) lemon juice (c) turmeric powder (d) white paper
20. 20.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same string is what we measure. (a) False (b) True
21. 21.🔍 Which is the odd one out? (a) a glass marble (b) a piece of foil (c) a strip of cloth (d) a steel spoon
22. 22.True or false: a clear glass of water is needed for the water rainbow. (a) False (b) True
23. 23.🛟 What is a safe way to use a ruler as a lever? (a) flick coins at faces (b) press it gently (c) stand on the ruler (d) bend it till it snaps
24. 24.True or false: sunlight is needed for the leafy bag test. (a) False (b) True
25. 25.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is kept the same. (a) False (b) True
26. 26.🛟 What should you do with wet floors after the experiment? (a) wipe them dry (b) pour more water (c) slide on them (d) leave them wet
27. 27.True or false: a mirror is needed for the pendulum. (a) False (b) True
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.True or false: a comb is needed for the yeast balloon. (a) True (b) False
30. 30.🧺 Which of these is not needed for the ruler lever? (a) a round pencil (b) a 30 cm ruler (c) turmeric powder (d) a flat table
31. 31.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
32. 32.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? True or false: the same ruler is kept the same. (a) False (b) True
33. 33.⚡ Which of these jumps to a charged comb? (a) a pebble (b) a heavy book (c) dry hair (d) a brick
34. 34.🔍 Which is the odd one out? (a) milk turning to curd (b) dissolving salt (c) melting ice (d) folding paper
35. 35.🔍 Sugar is stirred into water and seems to disappear. Where did it go? (a) it vanished for ever (b) it sank as sand (c) it spread in the water (d) it became air
36. 36.🔬 Which step of the scientific method is this: setting up wet and dry cotton with seeds (a) hypothesis (b) conclusion (c) question (d) experiment
37. 37.🥄 Which of these dissolves in water? (a) table salt (b) sawdust (c) cooking oil (d) sand
38. 38.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it turns red (c) it stays yellow (d) it turns black
39. 39.True or false: yeast is not needed for the water rainbow. (a) True (b) False
40. 40.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is kept the same? (a) the size of the bowl (b) how many drops form (c) sun or shade

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