Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 67 · 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 more baking soda blow the balloon up bigger? What do we do with “the same bottle”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🥛 Which of these works by air pressure? (a) a compass needle (b) a fridge magnet (c) a suction hook (d) a magnetic chess set
3. 3.🧺 Do we need turmeric powder for the ruler lever? (a) needed (b) not needed
4. 4.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we measure it (b) we keep it the same (c) we change it
5. 5.🔮 Predict: a stem is split in two, one half in red water and one in blue. What do the petals do? (a) they all turn green (b) they turn two colours (c) they stay white (d) they fall off at once
6. 6.🥄 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) small pebbles (d) baking soda
7. 7.🧺 Which of these is not needed for the turmeric test? (a) a balloon (b) soap solution (c) white paper strips (d) a dropper or spoon
8. 8.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a stiff postcard (c) a magnet (d) a glass of water
9. 9.🧲 Is a safety pin magnetic or non-magnetic? (a) magnetic (b) non-magnetic
10. 10.🔮 Predict: you add two more paper clips. How does it fall? (a) it floats up (b) it stops in the air (c) slower (d) faster
11. 11.🧺 Which of these is not needed for the magnet test? (a) a tray (b) test objects (c) a balloon (d) a bar magnet
12. 12.🔍 Which is the odd one out? (a) a fluff of cotton (b) an open sheet of paper (c) a feather (d) a stone
13. 13.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
14. 14.🔮 Predict: the adult irons for only one second. What happens? (a) the paper floats (b) writing turns green (c) it gets darker (d) writing stays faint
15. 15.True or false: white paper is needed for the secret lemon message. (a) True (b) False
16. 16.🧺 Do we need yeast for the pendulum? (a) not needed (b) needed
17. 17.⚖️ Fair test — which kind of ball bounces highest? True or false: the floor surface is what we measure. (a) True (b) False
18. 18.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) coins of one kind (c) yeast (d) a round pencil
19. 19.⚡ You comb dry hair and hold the comb near tiny paper bits. What happens? (a) nothing happens (b) they turn wet (c) they turn blue (d) the bits jump to it
20. 20.🍯 Is a pebble denser or less dense than water? (a) less dense than water (b) denser than water
21. 21.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) turmeric powder (b) sunlight (c) a rubber band (d) a clear plastic bag
22. 22.True or false: sugar is needed for the fizzy balloon. (a) False (b) True
23. 23.True or false: make seeds is a job of the roots. (a) True (b) False
24. 24.🥄 Why does sugar dissolve faster in warm water? (a) cold water is wet (b) particles move faster (c) warm water is thicker (d) sugar likes the dark
25. 25.True or false: salt is something yeast does not need. (a) False (b) True
26. 26.🧺 Do we need a balloon for sprouting seeds? (a) not needed (b) needed
27. 27.True or false: a glass of water is needed for the coloured flower experiment. (a) False (b) True
28. 28.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we keep it the same (b) we change it (c) we measure it
29. 29.🛟 Static from a comb is safe. Which electricity must children never play with? (a) a rubbed balloon (b) a rubbed plastic comb (c) paper bits on a comb (d) plug points at home
30. 30.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is the one thing we change? (a) how clear the view is (b) the same mirrors (c) the angle of the mirrors (d) the same carton
31. 31.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) an empty juice carton (b) a pencil (c) a ruler (d) a balloon
32. 32.🌱 Which of these does not sprout? (a) wet seeds by a window (b) wet seeds in the dark (c) seeds on wet cotton (d) boiled seeds
33. 33.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the amount of water (b) the size of the bowl (c) the cling film cover (d) sun or shade
34. 34.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
35. 35.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is what we measure? (a) the same hook (b) the string length (c) the weight of the bob (d) time for 10 swings
36. 36.True or false: a bamboo pole gets its strength from arches or domes. (a) True (b) False
37. 37.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) a balloon (c) cooking oil (d) water with food colour
38. 38.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the same cotton bud (b) the iron setting (c) the same paper (d) the kind of juice
39. 39.⚖️ 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 order of pouring”? (a) we measure it (b) we keep it the same (c) we change it
40. 40.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “how clear the view is”? (a) we change it (b) we keep it the same (c) we measure it

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