Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 12 · 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 card-on-a-glass trick. Which one is NOT needed? (a) a balloon (b) a glass of water (c) a sink or a bucket (d) a towel
2. 2.🛟 Who should trim the flower stem? (a) a pet (b) a grown-up (c) a toddler (d) anyone, without looking
3. 3.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the same glass is kept the same. (a) True (b) False
4. 4.🛟 Why should only a grown-up handle any hot water? (a) hot water is magnetic (b) it changes colour (c) hot water can scald (d) hot water is heavy
5. 5.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it sinks (b) it floats higher (c) it turns blue (d) it melts
6. 6.🧺 Which of these is needed for the balloon rocket? (a) a mirror (b) yeast (c) a magnet (d) sticky tape
7. 7.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a jar with a tight lid (b) a timer (c) a battery cell (d) fresh cream
8. 8.🔮 Predict: a magnet is held under a thin plastic plate with a paper clip on top. What happens? (a) the clip turns gold (b) nothing at all (c) the clip moves (d) the plate melts
9. 9.⚖️ Fair test — which paper shape holds the most coins? Which of these is the one thing we change? (a) the kind of coins (b) the kind of paper (c) the gap between books (d) the shape of the paper
10. 10.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to splash everyone (c) to win a prize (d) to keep children safe
11. 11.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) False (b) True
12. 12.🧺 Do we need test objects for the magnet test? (a) needed (b) not needed
13. 13.True or false: a coin is denser than water. (a) True (b) False
14. 14.🏗️ Where does a hollow bird bone get its strength from? (a) arches and domes (b) triangles (c) tubes
15. 15.True or false: curd is neutral. (a) False (b) True
16. 16.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
17. 17.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the weight of the bob (b) the string length (c) time for 10 swings
18. 18.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is what we measure? (a) the same string (b) how hard we must pull (c) the same cup of coins (d) the lifting height
19. 19.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the water temperature (c) the kind of sugar
20. 20.True or false: a mirror is not needed for the ruler lever. (a) True (b) False
21. 21.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is what we measure? (a) the same straw (b) distance it travels (c) the same string (d) the slope of the string
22. 22.🧺 Do we need a big bowl for the water cycle bowl? (a) needed (b) not needed
23. 23.💧 Why do water drops form on the outside of a glass of ice water? (a) the glass sweats (b) ice escapes the glass (c) vapour in air cools (d) the glass leaks
24. 24.🌈 In VIBGYOR, what number colour is red?
25. 25.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: number of pulleys is the one thing we change. (a) True (b) False
26. 26.🔍 Which is the odd one out? (a) sunlight (b) warmth (c) salt (d) soil
27. 27.True or false: a wet flat sheet makes a weak bridge. (a) True (b) False
28. 28.🛟 Which of these floats on water? (a) a ball of clay (b) a coin (c) a ping-pong ball (d) a glass marble
29. 29.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same muddy water is kept the same. (a) True (b) False
30. 30.True or false: a bowl is not needed for making butter. (a) False (b) True
31. 31.🪴 Which of these is a job of the leaves? (a) hold up the leaves (b) give out water vapour (c) hold the plant in soil (d) make seeds
32. 32.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
33. 33.⚖️ 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
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the same cotton bud (b) the iron setting (c) how dark the writing is (d) the same paper
35. 35.🔮 Predict: you cover the top mirror with paper. What do you see? (a) a brighter view (b) a rainbow (c) only darkness (d) two pictures
36. 36.True or false: string is needed for the thread-reel pulley. (a) False (b) True
37. 37.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) it stays still (c) backward (d) forward
38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) a dropper or spoon (c) soap solution (d) lemon juice
39. 39.🥛 Does a drinking straw work by air pressure or by magnetism? (a) air pressure (b) magnetism
40. 40.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) an adult with an iron (c) a balloon (d) a small bowl

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