Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 55 · 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: a battery cell is not needed for the thread-reel pulley. (a) True (b) False
2. 2.True or false: a mirror is not needed for the yeast balloon. (a) False (b) True
3. 3.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? Which of these is the one thing we change? (a) sheets it pulls through (b) the kind of paper (c) the magnet used (d) the same table
4. 4.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the iron setting”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) amount of water drops (b) the kind of plant (c) sun or shade
6. 6.🛟 What is a safe way to use a ruler as a lever? (a) bend it till it snaps (b) stand on the ruler (c) press it gently (d) flick coins at faces
7. 7.True or false: a small cup is needed for the water cycle bowl. (a) True (b) False
8. 8.🫗 Why does filtered muddy water look clearer? (a) the filter adds soap (b) the filter traps mud (c) the water evaporates (d) the mud dissolves
9. 9.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) food colour (d) small pebbles
10. 10.🧺 Which of these is needed for the water rainbow? (a) bright sunlight (b) yeast (c) a magnet (d) a balloon
11. 11.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a mirror (b) a clear glass of water (c) bright sunlight (d) a sunny window
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
13. 13.True or false: sugar is something yeast needs. (a) False (b) True
14. 14.🧲 Which of these push apart? (a) south near south (b) south near north (c) north near south
15. 15.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) the same paper (c) the kind of juice (d) the same cotton bud
16. 16.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same cup of coins”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it changes colour (c) it can pop loudly (d) it gets too heavy
18. 18.🍞 Does yeast need vinegar to make gas? (a) yeast does not need it (b) yeast needs it
19. 19.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) the bob could hit you (c) it is magnetic (d) it is wet
20. 20.True or false: a balloon is not needed for making butter. (a) True (b) False
21. 21.🛟 There is lightning outside. Where is it safest to be? (a) under a tall tree (b) in an open field (c) on a rooftop (d) indoors
22. 22.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) only an adult (c) whoever is fastest (d) any child
23. 23.True or false: a metal key sinks in water. (a) False (b) True
24. 24.🧺 Which of these is needed for the yeast balloon? (a) a small bottle (b) a mirror (c) a battery cell (d) a paper clip
25. 25.True or false: water is needed for sprouting seeds. (a) True (b) False
26. 26.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) tamarind water (c) vinegar (d) baking soda water
27. 27.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the person dropping is what we measure. (a) True (b) False
28. 28.True or false: an ice-cream stick sinks in water. (a) True (b) False
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) True (b) False
30. 30.🧺 Do we need a mirror for the dissolving test? (a) needed (b) not needed
31. 31.🍋 Why does the lemon writing turn brown with heat? (a) paper turns lemony (b) heat adds colour (c) the juice scorches first (d) the iron is brown
32. 32.True or false: a coin is less dense than water. (a) True (b) False
33. 33.True or false: a magnet is not needed for the paper helicopter. (a) True (b) False
34. 34.🧺 Which of these is needed for the paper helicopter? (a) a strip of paper (b) a mirror (c) a battery cell (d) a balloon
35. 35.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) sand is ground up (d) salt rains down
36. 36.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) a sheet of glass (b) the crumpled ball (c) neither of them (d) the flat sheet
37. 37.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the kind of flower”? (a) we keep it the same (b) we change it (c) we measure it
38. 38.🏗️ Why is a pulley used to lift water from a deep well? (a) the rope gets shorter (b) water gets lighter (c) pulling down is easier (d) the bucket floats
39. 39.🧺 Do we need a glass of water for the coloured flower experiment? (a) needed (b) not needed
40. 40.True or false: a magnet is not needed for the muddy water filter. (a) True (b) False

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