Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 120 · 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.🛟 Why must the jar lid be screwed on tightly? (a) so it turns yellow (b) so it gets hot (c) so cream does not spill (d) so air gets out
2. 2.🧺 Do we need a mirror for sprouting seeds? (a) not needed (b) needed
3. 3.True or false: a battery cell is needed for the paper bridge. (a) False (b) True
4. 4.True or false: a stiff postcard is needed for the card-on-a-glass trick. (a) False (b) True
5. 5.True or false: the swimmer goes forward. (a) False (b) True
6. 6.🔬 In the scientific method, which step number is “ask a question”?
7. 7.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
8. 8.🥛 Which of these works by magnetism? (a) a bicycle pump (b) a vacuum cleaner (c) a drinking straw (d) a magnetic chess set
9. 9.🛟 Which rule keeps you safe when working with sunlight? (a) look at it through glass (b) never look at the Sun (c) look at it in a mirror (d) stare at the Sun
10. 10.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the stirring”? (a) we keep it the same (b) we measure it (c) we change it
11. 11.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a glass of water (c) a balloon (d) a few hours of waiting
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is what we measure. (a) True (b) False
13. 13.🧺 Do we need a mirror for the water rainbow? (a) needed (b) not needed
14. 14.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a battery cell (c) a shallow dish (d) yeast
15. 15.🍯 Is a coin denser or less dense than water? (a) denser than water (b) less dense than water
16. 16.🧺 Which of these is needed for growing salt crystals? (a) salt (b) yeast (c) a mirror (d) turmeric powder
17. 17.🔮 Predict: a bowl of water is left uncovered in the hot sun all day. What happens? (a) it turns to salt (b) some water evaporates (c) it turns to ice (d) the water increases
18. 18.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) turmeric powder (b) moong seeds (c) a small bowl (d) a few days
19. 19.🧺 Do we need a magnet for the density tower? (a) not needed (b) needed
20. 20.⚖️ Fair test — do seeds need water to sprout? What do we do with “how many seeds sprout”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
22. 22.🔍 Which is the odd one out? (a) air (b) a cork (c) a ping-pong ball (d) honey
23. 23.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) a wheel and axle (d) an inclined plane
24. 24.🔍 Which is the odd one out? (a) making ice lollies (b) a pond icing over (c) wet hair drying (d) water becoming ice
25. 25.🧺 Do we need two clear glasses for the dissolving test? (a) not needed (b) needed
26. 26.🚁 Dropped from a raised hand, does a paper helicopter fall slowly or fast? (a) falls fast (b) falls slowly
27. 27.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) time to dissolve (b) the kind of sugar (c) the amount of water (d) the water temperature
28. 28.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) sawdust (d) baking soda
29. 29.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) soap solution (d) baking soda water
30. 30.🛟 Why should we wipe up spilled oil at once? (a) oil makes it rain (b) spilled oil is slippery (c) oil attracts magnets (d) oil turns into honey
31. 31.🔍 Which is the odd one out? (a) a dull brick (b) a mirror (c) dark soil (d) a rough wooden board
32. 32.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: the way we turn it is what we measure. (a) False (b) True
33. 33.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) neither of them (b) the flat sheet (c) a sheet of glass (d) the crumpled ball
34. 34.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a steering wheel (c) a see-saw (d) a slide
35. 35.🛟 Which is the safe way to do the float-or-sink test? (a) run around the tub (b) play near a deep pond (c) wipe up spills at once (d) leave water on the floor
36. 36.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the kind of ball”? (a) we measure it (b) we keep it the same (c) we change it
37. 37.🛟 Who should use the hot iron in the secret message experiment? (a) only an adult (b) whoever is fastest (c) any child (d) the youngest child
38. 38.🚁 Which of these falls slowly through the air? (a) a coin (b) a feather (c) a glass marble (d) a crumpled paper ball
39. 39.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is hot (b) a lever boosts your push (c) the spoon is magnetic (d) the lid gets softer

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