Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 32 · 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 is the odd one out? (a) a cork (b) a ping-pong ball (c) cooking oil (d) a glass marble
2. 2.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) salt rains down (c) fish make it (d) sand is ground up
3. 3.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) a magnet (b) a ruler (c) a pencil (d) a paper clip
4. 4.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the time of day”? (a) we keep it the same (b) we measure it (c) we change it
5. 5.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a round pencil (c) a flat table (d) yeast
6. 6.⚖️ What is the turning point of a lever called? (a) the load (b) the axle (c) the effort (d) the fulcrum
7. 7.⚖️ Coins on the two sides balance when coins × distance is ___. (a) always 10 (b) zero (c) equal on both sides (d) bigger on the left
8. 8.🔍 Which is the odd one out? (a) a pond icing over (b) wet clothes drying (c) making ice lollies (d) water becoming ice
9. 9.True or false: honey is less dense than water. (a) True (b) False
10. 10.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) lemon juice (c) soap solution (d) detergent water
11. 11.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? Which of these is kept the same? (a) the way we turn it (b) whether the card stays (c) how full the glass is
12. 12.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? What do we do with “the number of coins”? (a) we measure it (b) we keep it the same (c) we change it
13. 13.🕰️ Does a heavier bob change the swing time? (a) no, hardly at all (b) it stops swinging (c) yes, much slower (d) yes, much faster
14. 14.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it turns blue (c) it grows faster (d) it wilts and droops
15. 15.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
16. 16.True or false: a drinking straw is needed for the balloon rocket. (a) False (b) True
17. 17.True or false: a magnet is needed for the shadow clock. (a) False (b) True
18. 18.🧺 Which of these is not needed for the coloured flower experiment? (a) food colour (b) a few hours of waiting (c) a magnet (d) a glass of water
19. 19.🔍 Which is the odd one out? (a) a cotton thread (b) a paper towel (c) a flower stem (d) a piece of foil
20. 20.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is kept the same? (a) the time of day (b) the same stick (c) shadow length
21. 21.🏗️ Which of these gets its strength from a tube shape? (a) a bamboo pole (b) a bridge truss (c) an eggshell (d) an old stone bridge
22. 22.🛟 What should you do with wet floors after the experiment? (a) leave them wet (b) wipe them dry (c) pour more water (d) slide on them
23. 23.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) white paper (c) a mirror (d) lemon juice
24. 24.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we change it (b) we measure it (c) we keep it the same
25. 25.🔺 Which shape do engineers use in bridges and towers because it keeps its shape under a push? (a) the star (b) the square (c) the triangle (d) the heart shape
26. 26.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the kind of sugar”? (a) we measure it (b) we keep it the same (c) we change it
27. 27.🧺 Which of these is not needed for the density tower? (a) yeast (b) a tall clear glass (c) cooking oil (d) honey
28. 28.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
30. 30.True or false: a mirror reflects light poorly. (a) False (b) True
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is the one thing we change. (a) False (b) True
32. 32.🫗 Which of these is done by filtering? (a) tea leaves from tea (b) salt from sea water (c) sugar from sugar water (d) small stones from dal
33. 33.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the same glass”? (a) we measure it (b) we change it (c) we keep it the same
34. 34.🍞 Why does yeast work slowly in cold water? (a) cold kills sugar (b) cold water is heavy (c) cold makes it pink (d) cold slows yeast down
35. 35.True or false: a teaspoon is needed for the dissolving test. (a) False (b) True
36. 36.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
37. 37.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? True or false: the length of the blades is kept the same. (a) True (b) False
38. 38.🥛 Does a bicycle pump work by air pressure or by magnetism? (a) air pressure (b) magnetism
39. 39.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) seeds on wet cotton (c) boiled seeds (d) seeds on dry cotton
40. 40.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is kept the same. (a) True (b) False

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