Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 65 · 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 mirror is needed for the fizzy balloon. (a) False (b) True
2. 2.True or false: a battery cell is not needed for the paper helicopter. (a) True (b) False
3. 3.🧺 Which of these is not needed for the thread-reel pulley? (a) coins as the load (b) string (c) a small paper cup (d) a magnet
4. 4.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? True or false: sheets it pulls through is kept the same. (a) True (b) False
5. 5.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the same cotton bud
6. 6.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we keep it the same (c) we change it
7. 7.🕰️ A pendulum takes 2 seconds for one swing. How many swings does it make in 38 seconds?
8. 8.True or false: rusting iron is a change that can be undone. (a) True (b) False
9. 9.⚙️ Which of these uses a pulley? (a) a sloping road (b) a steering wheel (c) a see-saw (d) a crane
10. 10.🪴 Which part of a plant does this job: give out water vapour? (a) stem (b) roots (c) flower (d) leaves
11. 11.🛟 Which of these floats on water? (a) an iron nail (b) a coin (c) a cork (d) a ball of clay
12. 12.🔬 In the scientific method, which step number is “ask a question”?
13. 13.True or false: a paper towel lets water climb up it. (a) False (b) True
14. 14.💧 Which of these is condensation? (a) drops under a pot lid (b) ice becoming water (c) a pond icing over (d) water becoming ice
15. 15.True or false: a tap handle is an inclined plane. (a) True (b) False
16. 16.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a battery cell (b) coins of one kind (c) a 30 cm ruler (d) a flat table
17. 17.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a spoon (b) a balloon (c) honey (d) a tall clear glass
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we measure it (b) we keep it the same (c) we change it
19. 19.🧺 Do we need a magnet for the dissolving test? (a) needed (b) not needed
20. 20.🧲 Two magnets: north near north. Do they pull together or push apart? (a) push apart (b) pull together
21. 21.True or false: ice cubes is not needed for the water cycle bowl. (a) True (b) False
22. 22.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the kind of juice (c) the ironing time (d) the iron setting
23. 23.⚙️ Which simple machine is a tap handle? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
24. 24.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) the same jar (c) time to make butter
25. 25.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a tray for spills (c) vinegar (d) a mirror
26. 26.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the object we look at”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.🌉 Why does a zigzag-folded sheet hold more coins than a flat one? (a) folds are magnetic (b) folds make it wet (c) folds add glue (d) folds make it stiffer
28. 28.🧲 Is iron filings magnetic or non-magnetic? (a) magnetic (b) non-magnetic
29. 29.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) a sheet of glass (b) the flat sheet (c) the crumpled ball (d) neither of them
30. 30.🧺 Do we need a battery cell for the card-on-a-glass trick? (a) not needed (b) needed
31. 31.🧺 Do we need a results chart for the magnet test? (a) not needed (b) needed
32. 32.🧺 Which of these is not needed for the fizzy balloon? (a) vinegar (b) a comb (c) a funnel or spoon (d) a tray for spills
33. 33.True or false: table salt dissolves in water. (a) False (b) True
34. 34.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we keep it the same (c) we measure it
35. 35.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “distance from the pencil”? (a) we measure it (b) we keep it the same (c) we change it
36. 36.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) the amount of water (b) time to dissolve (c) the water temperature
37. 37.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is the one thing we change. (a) True (b) False
38. 38.🕰️ Does a heavier bob change the swing time? (a) it stops swinging (b) no, hardly at all (c) yes, much faster (d) yes, much slower
39. 39.🔮 Predict: you make the string 4 times as long. How does the swing time change? (a) it stays the same (b) it becomes 4 times (c) it doubles (d) it halves
40. 40.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny insects (b) tiny water drops (c) nothing at all (d) salt crystals

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