Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 64 · 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 straight stick is needed for the shadow clock. (a) True (b) False
2. 2.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “distance it travels”? (a) we keep it the same (b) we change it (c) we measure it
3. 3.True or false: a metal key sinks in water. (a) True (b) False
4. 4.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) the same bottle (c) spoons of baking soda (d) size of the balloon
5. 5.⚖️ Fair test — do seeds need water to sprout? True or false: the kind of seeds is what we measure. (a) False (b) True
6. 6.🥛 What holds the card up against the upside-down glass? (a) the cold water (b) a magnet (c) glue on the card (d) air pushing up
7. 7.🧺 Do we need a clear glass of water for the water rainbow? (a) needed (b) not needed
8. 8.🧺 Do we need water for the water cycle bowl? (a) not needed (b) needed
9. 9.📘 What does “dense” mean? (a) very colourful (b) very hot (c) very thin (d) heavy for its size
10. 10.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) a balloon (c) a magnet (d) a long string
11. 11.🧺 Which of these is needed for the ruler lever? (a) a flat table (b) a magnet (c) a balloon (d) turmeric powder
12. 12.True or false: a feather falls fast through the air. (a) True (b) False
13. 13.🧺 Do we need a battery cell for the periscope? (a) needed (b) not needed
14. 14.🛟 What is a safe bob for a home pendulum? (a) a heavy brick (b) a glass bottle (c) a small nut or washer (d) a sharp tool
15. 15.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) the balloon is bigger (d) it shrinks to nothing
16. 16.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it grows bigger (c) it shrinks (d) it turns blue
17. 17.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a magnet (c) white paper (d) a small bowl
18. 18.🚁 Which of these falls fast through the air? (a) a toy parachute (b) a feather (c) a crumpled paper ball (d) an open sheet of paper
19. 19.🌱 Will these sprout: wet seeds by a window? (a) sprouts (b) does not sprout
20. 20.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) milk turning to curd (d) freezing water
21. 21.⚖️ 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 sugar (b) the water temperature (c) the amount of yeast (d) size of the balloon
22. 22.⚖️ 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 change it (b) we measure it (c) we keep it the same
23. 23.🚁 Why do we clip a paper clip to the bottom of the helicopter? (a) to make it fall slower (b) to stop the spinning (c) to make it magnetic (d) to weigh down the bottom
24. 24.🔭 Why must the two mirrors face each other and be parallel? (a) to make it heavy (b) so light reaches the eye (c) so it looks shiny (d) so it can float
25. 25.🛟 What should you do after touching soil or seeds? (a) wash your hands (b) rub your eyes (c) lick your fingers (d) skip washing
26. 26.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.🧺 Do we need a mirror for the paper bridge? (a) not needed (b) needed
28. 28.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they turn two colours (b) they fall off at once (c) they all turn green (d) they stay white
29. 29.🧺 Which of these is needed for the periscope? (a) an empty juice carton (b) yeast (c) a balloon (d) turmeric powder
30. 30.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it sinks faster (b) it can float (c) it dissolves (d) it turns to stone
31. 31.True or false: the balloon goes forward. (a) True (b) False
32. 32.⚖️ What is the turning point of a lever called? (a) the effort (b) the load (c) the axle (d) the fulcrum
33. 33.🫧 Which of these is neutral? (a) salt water (b) lemon juice (c) tamarind water (d) soap solution
34. 34.True or false: orange juice is a base. (a) False (b) True
35. 35.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) exactly the same (b) it fills with soil (c) much more water (d) much less water
36. 36.📘 A pulley is a wheel with a groove for a ___. (a) magnet (b) nail (c) rope (d) battery
37. 37.💧 Which of these lets water climb up it? (a) a rubber eraser (b) a flower stem (c) a piece of foil (d) a plastic ruler
38. 38.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the kind of paper”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.True or false: south near north push apart. (a) False (b) True
40. 40.💧 Why do water drops form on the outside of a glass of ice water? (a) the glass leaks (b) vapour in air cools (c) ice escapes the glass (d) the glass sweats

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