Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 81 · 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.True or false: yeast is needed for the water rainbow. (a) False (b) True
2. 2.🧺 Do we need a mirror for the magnet test? (a) not needed (b) needed
3. 3.🧺 Do we need tiny paper bits for the static comb? (a) needed (b) not needed
4. 4.💧 Which of these does not let water climb? (a) a piece of chalk (b) a flower stem (c) a steel spoon (d) a cotton thread
5. 5.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the length of the stem”? (a) we measure it (b) we change it (c) we keep it the same
6. 6.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
7. 7.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) sticky tape (b) turmeric powder (c) a long string (d) a balloon
8. 8.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “whether it floats”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🧺 Which of these is needed for the paper bridge? (a) turmeric powder (b) a magnet (c) yeast (d) two books
10. 10.True or false: putting the iron away is a job for an adult. (a) False (b) True
11. 11.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is kept the same? (a) the angle of the mirrors (b) the same mirrors (c) how clear the view is
12. 12.🛟 Which is a safe rule for the balloon rocket? (a) keep it away from faces (b) aim it at your friend (c) put string round a neck (d) blow it till it bursts
13. 13.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
14. 14.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a mirror (d) a shallow dish
15. 15.⚙️ Which of these is an inclined plane? (a) a bottle opener (b) a sloping road (c) a flagpole (d) a spoon lifting a lid
16. 16.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
17. 17.🌈 In VIBGYOR, what number colour is yellow?
18. 18.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? What do we do with “sun or shade”? (a) we keep it the same (b) we measure it (c) we change it
19. 19.True or false: drops under a pot lid is evaporation. (a) False (b) True
20. 20.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) a mirror (c) white paper (d) lemon juice
21. 21.True or false: cutting the lemon is a job for an adult. (a) False (b) True
22. 22.🧺 Do we need a jar with a tight lid for making butter? (a) needed (b) not needed
23. 23.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the time of day is the one thing we change. (a) True (b) False
24. 24.🛟 Static from a comb is safe. Which electricity must children never play with? (a) plug points at home (b) a rubbed plastic comb (c) a rubbed balloon (d) paper bits on a comb
25. 25.🧺 Three of these are needed for the static comb. Which one is NOT needed? (a) a mirror (b) a plastic comb (c) dry hair (d) tiny paper bits
26. 26.🧺 Three of these are needed for the balloon rocket. Which one is NOT needed? (a) a drinking straw (b) a long string (c) vinegar (d) a balloon
27. 27.🧊 Why does an ice cube float on water? (a) water is sticky (b) ice is magnetic (c) ice is very cold (d) ice is less dense
28. 28.🧺 Do we need a big bowl for the water cycle bowl? (a) needed (b) not needed
29. 29.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: the same straw is kept the same. (a) True (b) False
30. 30.True or false: the rowing boat goes backward. (a) False (b) True
31. 31.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
32. 32.🔍 Which is the odd one out? (a) a puddle drying up (b) wet hair drying (c) wet clothes drying (d) dew on morning grass
33. 33.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) small test objects (b) a towel for spills (c) a magnet (d) a results table
34. 34.🧺 Which of these is needed for the balloon rocket? (a) a battery cell (b) a long string (c) vinegar (d) a magnet
35. 35.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) turmeric powder (c) water (d) a mirror
36. 36.🧺 Do we need turmeric powder for the pendulum? (a) needed (b) not needed
37. 37.True or false: yeast is needed for the pendulum. (a) True (b) False
38. 38.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) how big we blow it (b) distance it travels (c) the same string
39. 39.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) honey (b) water with food colour (c) a balloon (d) cooking oil
40. 40.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? What do we do with “time to dissolve”? (a) we change it (b) we measure it (c) we keep it the same

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