Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 15 · 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.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a string (b) a pencil and tape (c) a heavy nut or washer (d) yeast
2. 2.🧺 Do we need a battery cell for sprouting seeds? (a) not needed (b) needed
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) a spoon (d) a piece of string
4. 4.True or false: vinegar is not needed for the periscope. (a) False (b) True
5. 5.🔮 Predict: you make the string shorter. The swings get ___. (a) heavier (b) slower (c) quicker (d) stopped
6. 6.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a strip of paper (b) safety scissors (c) yeast (d) a pencil
7. 7.True or false: turmeric powder is needed for the balloon rocket. (a) True (b) False
8. 8.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) the paper ate it (c) the ink is magnetic (d) dry juice is see-through
9. 9.🥛 Why is it best to fill the glass right to the top? (a) it looks nicer (b) water is heavier (c) little air left inside (d) the card gets wet
10. 10.True or false: dry yeast is not needed for the yeast balloon. (a) True (b) False
11. 11.🧺 Which of these is not needed for the paper helicopter? (a) a paper clip (b) a strip of paper (c) safety scissors (d) turmeric powder
12. 12.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is the one thing we change. (a) False (b) True
13. 13.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the amount of clay is kept the same. (a) False (b) True
14. 14.🫧 Which of these is neutral? (a) detergent water (b) plain water (c) vinegar (d) lemon juice
15. 15.⚡ Which of these does not move to a charged comb? (a) a thin water stream (b) thermocol bits (c) puffed rice (d) a brick
16. 16.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) how far we pull it back (b) time for 10 swings (c) the string length (d) the weight of the bob
17. 17.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) a battery cell (d) coins as the load
18. 18.🚀 In “push back, move forward”, which way does water from the oars go? (a) goes backward (b) goes forward
19. 19.🧈 Which of these is a change that can be undone? (a) baking a cake (b) melting butter (c) cooking an egg (d) rusting iron
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) True (b) False
21. 21.🍋 What colour does the lemon writing turn when an adult warms it? (a) brown (b) green (c) white (d) blue
22. 22.🧺 Do we need a small cup for the water cycle bowl? (a) needed (b) not needed
23. 23.⚙️ Which of these is a lever? (a) a flagpole (b) a tap handle (c) a slide (d) a spoon lifting a lid
24. 24.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is kept the same. (a) False (b) True
25. 25.🚁 Dropped from a raised hand, does a fluff of cotton fall slowly or fast? (a) falls fast (b) falls slowly
26. 26.🍞 Which of these is something yeast does not need? (a) sugar (b) a magnet (c) time (d) warm water
27. 27.🧺 Do we need turmeric powder for the yeast balloon? (a) needed (b) not needed
28. 28.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) distance from the pencil (b) which side goes down (c) the number of coins
29. 29.🧺 Which of these is needed for the float-or-sink test? (a) a tub of water (b) a magnet (c) a mirror (d) turmeric powder
30. 30.🧺 Do we need a mirror for the shadow clock? (a) not needed (b) needed
31. 31.🌱 Which of these is not needed for a seed to sprout? (a) water (b) salt (c) warmth (d) air
32. 32.🧺 Which of these is needed for the float-or-sink test? (a) a towel for spills (b) a magnet (c) yeast (d) a balloon
33. 33.🛟 How should the plastic bag be tied around the branch? (a) with sharp wire (b) gently, not too tight (c) with a hot glue gun (d) as tight as possible
34. 34.True or false: a pebble jumps to a charged comb. (a) False (b) True
35. 35.🕰️ Which change makes a pendulum swing more slowly? (a) a lighter bob (b) a heavier bob (c) a shorter string (d) a longer string
36. 36.🛟 Which safety rule fits the fizzy balloon experiment? (a) put it in your mouth (b) seal it in a glass jar (c) keep it away from eyes (d) shake it near your face
37. 37.🌉 Which of these makes a strong bridge? (a) a torn flat sheet (b) a U-shaped channel (c) a wet flat sheet (d) a flat tissue
38. 38.🍋 Which of these steps is a job for an adult? (a) reading the message (b) putting the iron away (c) dipping the cotton bud (d) writing the message
39. 39.🕰️ Which old clock uses a pendulum to keep time? (a) a digital watch (b) a sundial (c) a phone (d) a grandfather clock
40. 40.🧺 Do we need a mirror for the water rainbow? (a) not needed (b) needed

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