Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 28 · 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.⚖️ 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 what we measure. (a) False (b) True
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we measure it (c) we change it
3. 3.⚖️ A child tests plants with and without water, but puts one in the sun and one in a cupboard. Is it a fair test? (a) only on Sundays (b) no, two things changed (c) yes, it is fair (d) yes, if done fast
4. 4.True or false: a coin falls fast through the air. (a) False (b) True
5. 5.🧺 Do we need yeast for the paper helicopter? (a) needed (b) not needed
6. 6.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is the one thing we change? (a) the same string (b) the slope of the string (c) the same straw (d) how big we blow it
7. 7.True or false: cooking an egg is a change that can be undone. (a) True (b) False
8. 8.📘 Air presses on everything around us. What is this push called? (a) air pressure (b) magnetism (c) friction (d) sunlight
9. 9.True or false: a magnet is not needed for the yeast balloon. (a) False (b) True
10. 10.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) muddy water (c) sand and pebbles (d) yeast
11. 11.True or false: a cotton bud is needed for the secret lemon message. (a) False (b) True
12. 12.🎈 When does the balloon rocket stop? (a) when the air runs out (b) when it gets cold (c) it never stops (d) when it turns blue
13. 13.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if shaken (c) yes, if cooled (d) yes, in the dark
14. 14.🪴 Which part of a plant does this job: take in water from soil? (a) roots (b) leaves (c) flower (d) stem
15. 15.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
16. 16.🔍 Which is the odd one out? (a) rusting iron (b) baking a cake (c) cooking an egg (d) folding paper
17. 17.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is kept the same. (a) False (b) True
18. 18.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the string length is the one thing we change. (a) True (b) False
19. 19.🧺 Do we need a big bowl for the water cycle bowl? (a) needed (b) not needed
20. 20.True or false: a magnet is needed for sprouting seeds. (a) False (b) True
21. 21.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same straw”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we measure it (b) we keep it the same (c) we change it
23. 23.True or false: a sunny open place is needed for the shadow clock. (a) True (b) False
24. 24.True or false: a battery cell is needed for the ruler lever. (a) False (b) True
25. 25.⚡ Which big natural spark is caused by static electricity? (a) the wind (b) dew (c) a rainbow (d) lightning
26. 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the amount of water is kept the same. (a) True (b) False
27. 27.🔮 Predict: a magnet is held under a thin plastic plate with a paper clip on top. What happens? (a) the clip moves (b) the clip turns gold (c) the plate melts (d) nothing at all
28. 28.⚙️ Which simple machine is a spoon lifting a lid? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
29. 29.🧺 Which of these is not needed for the fizzy balloon? (a) baking soda (b) vinegar (c) an empty bottle (d) a battery cell
30. 30.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a strip of paper (b) turmeric powder (c) safety scissors (d) a paper clip
31. 31.🔮 Predict: you make more, closer zigzag folds. The bridge holds ___ coins. (a) zero (b) fewer (c) the same number of (d) more
32. 32.True or false: honey is needed for the density tower. (a) True (b) False
33. 33.True or false: vinegar is not needed for the magnet test. (a) True (b) False
34. 34.🛟 Is this a safe or an unsafe habit in an experiment: washing hands afterwards? (a) safe (b) unsafe
35. 35.🔮 Predict: you rub a balloon on dry hair and hold it on a wall. What happens? (a) it bursts at once (b) it falls straight down (c) it sticks for a while (d) it turns into water
36. 36.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it melts (b) it turns blue (c) it floats higher (d) it sinks
37. 37.True or false: wiping up spills at once is a safe habit. (a) True (b) False
38. 38.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) air (c) soil (d) sugar
39. 39.🟡 Which of these turns turmeric paper reddish-brown? (a) lemon juice (b) soap solution (c) sugar water (d) vinegar
40. 40.🧺 Do we need a drinking straw for the balloon rocket? (a) not needed (b) needed

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