Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 82 · 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.🌈 In VIBGYOR, what number colour is yellow?
2. 2.🔮 Predict: you make the periscope tube twice as tall. You can see over ___. (a) the ground (b) nothing at all (c) taller walls (d) only short walls
3. 3.🧺 Which of these is needed for the water rainbow? (a) turmeric powder (b) a magnet (c) a balloon (d) a sheet of white paper
4. 4.🔍 Which is the odd one out? (a) baking soda water (b) vinegar (c) tamarind water (d) sugar water
5. 5.🥄 Does powdered sugar dissolve faster or slower? (a) slower (b) faster
6. 6.⚖️ A child tests plants with and without water, but puts one in the sun and one in a cupboard. Is it a fair test? (a) only on Sundays (b) yes, it is fair (c) yes, if done fast (d) no, two things changed
7. 7.🔮 Predict: wet clothes are hung out on a sunny, windy day. How do they dry? (a) faster (b) slower (c) they turn to ice (d) they never dry
8. 8.True or false: a magnet is not needed for the paper helicopter. (a) False (b) True
9. 9.🧺 Which of these is needed for the shadow clock? (a) a balloon (b) a battery cell (c) yeast (d) chalk to mark shadows
10. 10.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
11. 11.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is what we measure. (a) True (b) False
12. 12.🚀 Which of these goes forward? (a) the rocket (b) air from the balloon (c) water from the oars (d) water a swimmer pushes
13. 13.☀️ What is white sunlight really made of? (a) only yellow light (b) tiny drops of water (c) tiny bits of dust (d) many colours mixed
14. 14.🔍 Which is the odd one out? (a) black cloth (b) dark soil (c) still clear water (d) a dull brick
15. 15.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is the one thing we change? (a) time to dissolve (b) the stirring (c) the amount of sugar (d) the water temperature
16. 16.🧺 Which of these is not needed for the paper bridge? (a) a balloon (b) sheets of paper (c) coins (d) two books
17. 17.True or false: writing the message is a job a child can do. (a) False (b) True
18. 18.True or false: a fridge magnet works by air pressure. (a) True (b) False
19. 19.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is what we measure? (a) how much of each liquid (b) the order of pouring (c) the order of the layers (d) the same three liquids
20. 20.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the same glass”? (a) we measure it (b) we keep it the same (c) we change it
21. 21.🪴 Which of these is a job of the stem? (a) give out water vapour (b) make food in sunlight (c) make seeds (d) carry water upward
22. 22.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is what we measure? (a) the same card (b) the way we turn it (c) the same glass (d) whether the card stays
23. 23.🥛 Which of these works by air pressure? (a) a bicycle pump (b) a compass needle (c) a fridge magnet (d) a magnetic pin holder
24. 24.🔮 Predict: the jar is filled right to the top with cream. What happens? (a) it is much faster (b) it turns pink (c) it makes salt (d) it takes much longer
25. 25.🧺 Which of these is needed for the periscope? (a) a magnet (b) turmeric powder (c) a battery cell (d) sticky tape
26. 26.🌱 Will these sprout: seeds in the freezer? (a) does not sprout (b) sprouts
27. 27.True or false: a ruler is needed for the paper helicopter. (a) True (b) False
28. 28.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) the size of the plant (b) sun or shade (c) amount of water drops
29. 29.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
30. 30.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
31. 31.True or false: yeast is needed for the balloon rocket. (a) False (b) True
32. 32.🌱 Is sunlight needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
33. 33.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? Which of these is what we measure? (a) the same comb (b) the paper bit size (c) the same hair (d) paper bits picked up
34. 34.🫗 Why does cooking oil float on top of water? (a) oil is hot (b) oil is less dense (c) oil is heavier (d) oil is sticky
35. 35.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a cotton bud (b) a balloon (c) white paper (d) lemon juice
36. 36.🌉 Which of these makes a weak bridge? (a) one flat sheet (b) rolled paper tubes (c) a U-shaped channel (d) paper with folded edges
37. 37.True or false: tamarind water is neutral. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) touching a hot iron (b) washing hands afterwards (c) tying back long hair (d) wiping up spills at once
39. 39.🔍 Which is the odd one out? (a) browning lemon ink (b) folding paper (c) milk turning to curd (d) baking a cake
40. 40.⚖️ Fair test — which kind of ball bounces highest? True or false: the floor surface is what we measure. (a) False (b) True

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