Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 37 · 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 does the paper helicopter do as it falls? (a) it stays still in air (b) it flies upward (c) it spins round (d) it turns into a ball
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we measure it (b) we change it (c) we keep it the same
3. 3.🧺 Which of these is not needed for the balloon rocket? (a) a long string (b) a battery cell (c) a balloon (d) sticky tape
4. 4.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) the rainbow fades (c) it turns all red (d) it turns brighter
5. 5.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) a magnet
6. 6.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the tub of water”? (a) we measure it (b) we change it (c) we keep it the same
7. 7.True or false: a pencil and tape is not needed for the pendulum. (a) False (b) True
8. 8.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a balloon (c) warm water (d) a mirror
9. 9.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the kind of paper is the one thing we change. (a) False (b) True
10. 10.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) germs are invisible (c) clear water is salty (d) clear water is sweet
12. 12.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
13. 13.🚀 Which of these goes backward? (a) the balloon (b) air from the balloon (c) the rowing boat (d) the rocket
14. 14.🚀 In “push back, move forward”, which way does gas from the rocket go? (a) goes forward (b) goes backward
15. 15.True or false: a battery cell is not needed for the yeast balloon. (a) False (b) True
16. 16.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is what we measure? (a) amount of water drops (b) sun or shade (c) the kind of plant (d) the same kind of bag
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the kind of juice”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.⚖️ Fair test — do seeds need water to sprout? What do we do with “the kind of seeds”? (a) we measure it (b) we change it (c) we keep it the same
19. 19.True or false: a ruler is not needed for the paper helicopter. (a) False (b) True
20. 20.🔮 Predict: you add two more paper clips. How does it fall? (a) it floats up (b) slower (c) it stops in the air (d) faster
21. 21.True or false: soap solution is neutral. (a) False (b) True
22. 22.🧊 Why does an ice cube float on water? (a) water is sticky (b) ice is magnetic (c) ice is less dense (d) ice is very cold
23. 23.🥛 What holds the card up against the upside-down glass? (a) air pushing up (b) glue on the card (c) a magnet (d) the cold water
24. 24.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the size of the bowl”? (a) we measure it (b) we change it (c) we keep it the same
25. 25.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a tall clear glass (c) a spoon (d) a balloon
26. 26.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed
27. 27.🎈 When does the balloon rocket stop? (a) when it turns blue (b) when it gets cold (c) it never stops (d) when the air runs out
28. 28.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we change it (b) we keep it the same (c) we measure it
29. 29.🧲 Two magnets: south near south. Do they pull together or push apart? (a) pull together (b) push apart
30. 30.True or false: south near south push apart. (a) False (b) True
31. 31.🚁 Dropped from a raised hand, does a paper helicopter fall slowly or fast? (a) falls fast (b) falls slowly
32. 32.⚖️ Coins on the two sides balance when coins × distance is ___. (a) zero (b) always 10 (c) bigger on the left (d) equal on both sides
33. 33.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) changes pull direction (c) halves the weight (d) makes it magnetic
34. 34.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
35. 35.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) cheese (c) butter lumps (d) still runny cream
36. 36.⚡ Which big natural spark is caused by static electricity? (a) a rainbow (b) lightning (c) the wind (d) dew
37. 37.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) the way we turn it (b) whether the card stays (c) how full the glass is
38. 38.🧺 Which of these is not needed for the fizzy balloon? (a) a funnel or spoon (b) baking soda (c) vinegar (d) a seed
39. 39.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? What do we do with “number of rubs”? (a) we keep it the same (b) we change it (c) we measure it
40. 40.⚙️ Which of these is an inclined plane? (a) a see-saw (b) a sloping road (c) a spoon lifting a lid (d) a crane

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