Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 117 · 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.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
2. 2.🧺 Three of these are needed for the water rainbow. Which one is NOT needed? (a) a clear glass of water (b) bright sunlight (c) a sheet of white paper (d) a magnet
3. 3.True or false: a pond icing over is freezing. (a) True (b) False
4. 4.🔍 Which layer is on top in the honey-water-oil tower? (a) the spoon (b) coloured water (c) cooking oil (d) honey
5. 5.🪴 Through which part does a plant take in water from the soil? (a) the flowers (b) the roots (c) the leaves (d) the fruits
6. 6.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a magnet (c) a mirror (d) a balloon
7. 7.🌱 Which of these sprouts in a few days? (a) wet seeds in the dark (b) seeds in the freezer (c) boiled seeds (d) seeds on dry cotton
8. 8.⚖️ Fair test — does a longer string make the pendulum swing more slowly? Which of these is kept the same? (a) the string length (b) time for 10 swings (c) the weight of the bob
9. 9.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) turmeric powder (b) a towel for spills (c) small test objects (d) a results table
10. 10.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “the time we wait”? (a) we change it (b) we measure it (c) we keep it the same
11. 11.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the stirring is what we measure. (a) True (b) False
12. 12.🌅 In the morning the Sun is in the east. Which way does a shadow point? (a) north (b) west (c) up (d) east
13. 13.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “how far we pull it back”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.True or false: a jar with a tight lid is needed for making butter. (a) False (b) True
15. 15.🧺 Do we need coins of one kind for the ruler lever? (a) needed (b) not needed
16. 16.💧 Which change is this: a puddle drying up? (a) melting (b) evaporation (c) freezing (d) condensation
17. 17.True or false: a mirror is needed for the density tower. (a) False (b) True
18. 18.📘 The browning of lemon juice with heat is a ___ change. (a) musical (b) magnetic (c) physical (d) chemical
19. 19.⚡ A rubbed comb is held near a thin water stream. What happens? (a) jumps to the comb (b) does not move
20. 20.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we measure it (c) we change it
21. 21.🔍 Sand is stirred into water. What do you see after a while? (a) it settles at the bottom (b) it floats up (c) it turns blue (d) it dissolves
22. 22.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? Which of these is kept the same? (a) the same paper clip (b) sheets it pulls through (c) the magnet used
23. 23.🧺 Do we need white paper for the secret lemon message? (a) not needed (b) needed
24. 24.⚖️ Why is it easier to open a tin lid with the handle of a spoon? (a) the spoon is magnetic (b) a lever boosts your push (c) the spoon is hot (d) the lid gets softer
25. 25.⚖️ Fair test — how does the shadow of a stick change through the day? What do we do with “shadow length”? (a) we measure it (b) we change it (c) we keep it the same
26. 26.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “the same string”? (a) we change it (b) we keep it the same (c) we measure it
27. 27.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? True or false: the order of pouring is what we measure. (a) False (b) True
28. 28.🧺 Do we need cooking oil for the density tower? (a) needed (b) not needed
29. 29.True or false: a flower stem does not let water climb. (a) True (b) False
30. 30.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we change it (b) we keep it the same (c) we measure it
31. 31.🧺 Do we need a battery cell for the paper bridge? (a) needed (b) not needed
32. 32.True or false: the rowing boat goes forward. (a) True (b) False
33. 33.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
34. 34.🛟 Who should use the hot iron in the secret message experiment? (a) whoever is fastest (b) the youngest child (c) only an adult (d) any child
35. 35.True or false: hold the plant in soil is a job of the stem. (a) True (b) False
36. 36.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) still runny cream (c) cheese (d) butter lumps
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) the amount of cream (c) the cream temperature (d) time to make butter
38. 38.💧 Which of these does not let water climb? (a) a flower stem (b) a paper towel (c) a plastic ruler (d) a sugar cube
39. 39.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) cooking oil (b) a spoon (c) a mirror (d) a tall clear glass
40. 40.🌈 How many colours do we name in a rainbow (VIBGYOR)?

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