Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 18 · 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.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the drop height”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) rub your eyes (b) skip washing (c) lick your fingers (d) wash your hands
3. 3.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same cup of coins is what we measure. (a) True (b) False
4. 4.True or false: a magnet is not needed for the shadow clock. (a) False (b) True
5. 5.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the same glass”? (a) we keep it the same (b) we measure it (c) we change it
6. 6.🛟 Coins have been touched by many hands. After the experiment you should ___. (a) skip washing (b) rub your eyes (c) wash your hands (d) lick your fingers
7. 7.⚖️ Fair test — which kind of ball bounces highest? Which of these is what we measure? (a) the person dropping (b) the kind of ball (c) bounce height (d) the floor surface
8. 8.⚡ You comb dry hair and hold the comb near tiny paper bits. What happens? (a) the bits jump to it (b) they turn wet (c) they turn blue (d) nothing happens
9. 9.⚙️ Which of these is a lever? (a) a flagpole (b) a see-saw (c) a slide (d) a steering wheel
10. 10.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) a battery cell (c) string (d) turmeric powder
11. 11.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
12. 12.🔍 What do you see a day after a white flower stands in blue water? (a) the water turns green (b) the petals turn bluish (c) the stem turns to ice (d) the flower floats away
13. 13.True or false: chalk to mark shadows is not needed for the shadow clock. (a) False (b) True
14. 14.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the paper clip is kept the same. (a) False (b) True
15. 15.True or false: a doorknob is a wheel and axle. (a) True (b) False
16. 16.🫧 Which of these is an acid? (a) detergent water (b) lemon juice (c) sugar water (d) plain water
17. 17.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
18. 18.True or false: washing hands afterwards is a safe habit. (a) False (b) True
19. 19.True or false: plain water is neutral. (a) True (b) False
20. 20.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) False (b) True
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a strip of paper (b) a paper clip (c) a balloon (d) a ruler
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is what we measure. (a) True (b) False
24. 24.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: how much of each liquid is kept the same. (a) False (b) True
25. 25.True or false: tea leaves from tea is done by filtering. (a) False (b) True
26. 26.🛟 Which of these is an unsafe habit? (a) tying back long hair (b) reading the steps first (c) asking an adult first (d) mixing random liquids
27. 27.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is the one thing we change? (a) the same window (b) the same glass (c) the amount of water (d) brightness of rainbow
29. 29.⚖️ Fair test — which paper shape holds the most coins? What do we do with “the kind of paper”? (a) we measure it (b) we keep it the same (c) we change it
30. 30.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a sunny window (b) bright sunlight (c) turmeric powder (d) a sheet of white paper
31. 31.🧺 Three of these are needed for the coloured flower experiment. Which one is NOT needed? (a) food colour (b) a white flower (c) a glass of water (d) a magnet
32. 32.⚖️ Fair test — which kind of ball bounces highest? Which of these is kept the same? (a) bounce height (b) the kind of ball (c) the person dropping
33. 33.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) a magnet (c) a small bowl (d) turmeric powder
34. 34.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to grow plants (c) to cool the glass (d) to catch any spills
35. 35.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the time of day is kept the same. (a) False (b) True
36. 36.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it might sing (c) it could fall on you (d) it gets hot
37. 37.🧭 Which tool uses a magnet to find directions? (a) a sundial (b) a pulley (c) a periscope (d) a compass
38. 38.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the stick kept upright is kept the same. (a) False (b) True
39. 39.🧺 Do we need a magnet for the leafy bag test? (a) not needed (b) needed
40. 40.🧺 Do we need a big bowl for the water cycle bowl? (a) needed (b) not needed

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