Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 44 · 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 — 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
2. 2.⚖️ 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) True (b) False
3. 3.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) a sheet of white paper (c) a sunny window (d) a mirror
4. 4.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a potted plant (c) vinegar (d) a battery cell
5. 5.🌈 In VIBGYOR, what number colour is red?
6. 6.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the same stick is kept the same. (a) False (b) True
7. 7.🌱 Will these sprout: wet seeds by a window? (a) does not sprout (b) sprouts
8. 8.🧺 Do we need a magnet for the fizzy balloon? (a) needed (b) not needed
9. 9.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) keep it for a month (c) throw it at a wall (d) pour it down the sink
10. 10.💧 Which of these is evaporation? (a) dew on morning grass (b) wet clothes drying (c) a misty bathroom mirror (d) drops under a pot lid
11. 11.🔍 Which is the odd one out? (a) a compass needle (b) a fridge magnet (c) a magnetic chess set (d) a bicycle pump
12. 12.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the iron setting (c) the same paper (d) the same cotton bud
13. 13.True or false: turmeric powder is not needed for the water cycle bowl. (a) False (b) True
14. 14.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? What do we do with “distance to the paper”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.📘 What does “dense” mean? (a) very thin (b) very hot (c) heavy for its size (d) very colourful
16. 16.True or false: a balloon is needed for the secret lemon message. (a) False (b) True
17. 17.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) turmeric powder (c) a potted plant (d) a clear plastic bag
18. 18.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) sunlight (c) a clear plastic bag (d) yeast
19. 19.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
20. 20.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) vinegar (b) a potted plant (c) a rubber band (d) sunlight
21. 21.True or false: a funnel is not needed for the muddy water filter. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) lemon juice (d) soap solution
23. 23.🌉 Does a flat tissue make a strong or a weak bridge? (a) strong bridge (b) weak bridge
24. 24.🔮 Predict: you write with plain water instead of lemon juice. What appears after ironing? (a) a rainbow (b) blue words (c) almost nothing (d) dark brown words
25. 25.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) only an adult (c) the youngest child (d) whoever is fastest
26. 26.True or false: small test objects is needed for the float-or-sink test. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) cooking oil (b) baking soda (c) table salt (d) glucose powder
28. 28.🔍 What do you see a day after a white flower stands in blue water? (a) the flower floats away (b) the petals turn bluish (c) the water turns green (d) the stem turns to ice
29. 29.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a magnet (b) a rubber band (c) a potted plant (d) sunlight
30. 30.📘 What is yeast? (a) a kind of sugar (b) a tiny living fungus (c) a kind of stone (d) a kind of salt
31. 31.🌈 How many colours do we name in a rainbow (VIBGYOR)?
32. 32.🛟 What should you do after handling food colour? (a) wash your hands (b) wipe them on walls (c) lick your fingers (d) rub your eyes
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the same bottles (b) the amount of sugar (c) size of the balloon (d) the water temperature
34. 34.🥛 Which of these works by air pressure? (a) a suction hook (b) a magnetic pin holder (c) a magnetic chess set (d) a compass needle
35. 35.🔭 Does a mirror reflect light well or poorly? (a) reflects light poorly (b) reflects light well
36. 36.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) slower (b) faster (c) they turn to ice (d) they never dry
37. 37.🧺 Three of these are needed for the pendulum. Which one is NOT needed? (a) a ruler (b) yeast (c) a heavy nut or washer (d) a stopwatch
38. 38.🔦 Is clear plastic film opaque, translucent or transparent? (a) translucent (b) transparent (c) opaque
39. 39.🔮 Predict: you make the string shorter. The swings get ___. (a) quicker (b) slower (c) stopped (d) heavier
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the light we look in

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