Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 47 · 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.🚀 Which of these goes backward? (a) the rocket (b) the rowing boat (c) the balloon (d) water from the oars
2. 2.🧺 Which of these is needed for the coloured flower experiment? (a) a battery cell (b) a few hours of waiting (c) a balloon (d) a magnet
3. 3.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the room it stands in”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same three liquids is the one thing we change. (a) True (b) False
5. 5.🛟 Which is the safe way to do the float-or-sink test? (a) leave water on the floor (b) wipe up spills at once (c) play near a deep pond (d) run around the tub
6. 6.⚡ Which of these does not move to a charged comb? (a) a brick (b) dry hair (c) puffed rice (d) thermocol bits
7. 7.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) True (b) False
8. 8.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🧲 Which of these pull together? (a) north near north (b) south near south (c) south near north
10. 10.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a sink or a bucket (c) a towel (d) a glass of water
11. 11.🧲 Two magnets: south near north. Do they pull together or push apart? (a) push apart (b) pull together
12. 12.⚙️ Which simple machine is a crowbar? (a) a wheel and axle (b) a pulley (c) an inclined plane (d) a lever
13. 13.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a magnet (c) a ruler (d) a pencil and tape
14. 14.🔮 A cork floats in tap water. What happens in very salty water? (a) it dissolves (b) it sinks (c) it still floats (d) it turns white
15. 15.🛟 What should you wear for a long time in the hot sun? (a) nothing on your head (b) a raincoat (c) a woollen sweater (d) a cap or hat
16. 16.🌈 In VIBGYOR, what number colour is indigo?
17. 17.🧺 Three of these are needed for the paper bridge. Which one is NOT needed? (a) coins (b) yeast (c) a ruler (d) sheets of paper
18. 18.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) bright sunlight (b) a clear glass of water (c) yeast (d) a sheet of white paper
19. 19.🔬 Which step of the scientific method is this: loading coins on each paper bridge (a) experiment (b) question (c) observation (d) conclusion
20. 20.🔮 Predict: you spray fine water drops with the Sun behind you. What may you see? (a) snow falling (b) a magnet (c) a shadow of ice (d) a small rainbow
21. 21.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? Which of these is the one thing we change? (a) the paper bit size (b) distance to the paper (c) number of rubs (d) paper bits picked up
22. 22.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is the one thing we change? (a) the room it stands in (b) the length of the stem (c) the kind of flower (d) the amount of water
23. 23.🛟 Which scissors should children use to cut the paper? (a) gardening shears (b) sharp kitchen shears (c) a paper cutter (d) safety scissors
24. 24.True or false: a mirror reflects light well. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) soil (b) warmth (c) air (d) water
26. 26.🫗 How do we separate salt from sea water? (a) winnowing (b) filtering (c) handpicking (d) evaporating
27. 27.🔍 Which is the odd one out? (a) a fluff of cotton (b) a stone (c) an open sheet of paper (d) a paper helicopter
28. 28.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) roots (b) veins (c) stomata (d) petals
29. 29.🛟 Why should you not wrap the string around your finger? (a) it gets longer (b) it turns blue (c) it can hurt your finger (d) it gets wet
30. 30.🧺 Which of these is needed for the magnet test? (a) a balloon (b) vinegar (c) a tray (d) a battery cell
31. 31.True or false: a bicycle pump works by magnetism. (a) False (b) True
32. 32.True or false: a flagpole uses a pulley. (a) True (b) False
33. 33.🧺 Do we need a mirror for the magnet test? (a) needed (b) not needed
34. 34.🧲 Which of these is pulled by a magnet? (a) a cotton cloth (b) an aluminium can (c) a plastic ruler (d) a steel paper clip
35. 35.🧺 Which of these is needed for the dissolving test? (a) a mirror (b) cotton wool (c) a magnet (d) a clock or timer
36. 36.⚡ Why does the comb trick work best on a dry day? (a) wet hair is magnetic (b) dry days are noisy (c) water adds charge (d) damp air leaks charge
37. 37.🧲 Is a safety pin magnetic or non-magnetic? (a) non-magnetic (b) magnetic
38. 38.🧈 Which of these is a change that cannot be undone? (a) milk turning to curd (b) folding paper (c) dissolving salt (d) melting butter
39. 39.True or false: a mirror is not needed for the coloured flower experiment. (a) True (b) False
40. 40.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of yeast (b) the same bottles (c) the amount of sugar (d) size of the balloon

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