Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 104 · 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.🧺 Which of these is needed for the secret lemon message? (a) a mirror (b) a magnet (c) a balloon (d) white paper
2. 2.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same cotton bud is kept the same. (a) True (b) False
3. 3.🪴 Which part of a plant does this job: take in water from soil? (a) roots (b) stem (c) flower (d) leaves
4. 4.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is the one thing we change. (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 order of the layers”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) a potted plant (c) a magnet (d) a clear plastic bag
7. 7.True or false: a results table is needed for the float-or-sink test. (a) False (b) True
8. 8.True or false: vinegar is needed for the leafy bag test. (a) True (b) False
9. 9.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rub it hard (c) rinse with clean water (d) ignore it
10. 10.🔍 Which is the odd one out? (a) cooking oil (b) air (c) a cork (d) a glass marble
11. 11.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the fulcrum (d) the effort
12. 12.True or false: vinegar is needed for the magnet test. (a) True (b) False
13. 13.🔍 Which is the odd one out? (a) a steel spoon (b) a plastic ruler (c) a piece of foil (d) a piece of chalk
14. 14.True or false: warm water is something yeast needs. (a) True (b) False
15. 15.🥚 Why is an egg hard to crush when you press on its two ends? (a) it is magnetic (b) it is very hot (c) it is made of steel (d) its curved arch shape
16. 16.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to catch any spills (c) to grow plants (d) to cool the glass
17. 17.🔍 Which is the odd one out? (a) a copper wire (b) a plastic ruler (c) an aluminium can (d) a sewing needle
18. 18.⚖️ 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 change it (c) we keep it the same
19. 19.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
20. 20.🧺 Which of these is needed for the muddy water filter? (a) yeast (b) cotton or cloth (c) a balloon (d) a magnet
21. 21.🔭 Which of these reflects light poorly? (a) a mirror (b) aluminium foil (c) a dull brick (d) a shiny steel plate
22. 22.🧺 Do we need a mirror for making butter? (a) needed (b) not needed
23. 23.True or false: a glass marble floats on water. (a) False (b) True
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) a small paper cup (b) an empty thread reel (c) a battery cell (d) string
26. 26.⚙️ Which of these is a wheel and axle? (a) a flagpole (b) a doorknob (c) a crane (d) a well pulley
27. 27.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) the paper ate it (c) it turned into air (d) the ink is magnetic
28. 28.🔮 Predict: you make the string shorter. The swings get ___. (a) slower (b) stopped (c) quicker (d) heavier
29. 29.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) salt rains down (c) sand is ground up (d) sea water evaporates
30. 30.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
31. 31.True or false: yeast is needed for sprouting seeds. (a) True (b) False
32. 32.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the cream temperature (b) the amount of cream (c) the same jar (d) time to make butter
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we keep it the same (c) we change it
34. 34.🧺 Which of these is needed for the fizzy balloon? (a) a comb (b) an empty bottle (c) a mirror (d) a magnet
35. 35.True or false: a magnet is needed for sprouting seeds. (a) True (b) False
36. 36.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) warm water (c) a mirror (d) a paper clip
37. 37.🧺 Do we need a towel for the card-on-a-glass trick? (a) needed (b) not needed
38. 38.🔮 Predict: an empty capped bottle floats. What happens if you fill it with sand? (a) it floats higher (b) it melts (c) it sinks (d) it turns blue
39. 39.🧺 Do we need a pencil and tape for the pendulum? (a) not needed (b) needed
40. 40.🔬 How many steps are there in our scientific method (question to conclusion)?

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