Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 35 · 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 not needed for the paper helicopter? (a) a ruler (b) safety scissors (c) a pencil (d) a mirror
2. 2.🧺 Do we need a magnet for the static comb? (a) needed (b) not needed
3. 3.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? Which of these is kept the same? (a) number of rubs (b) the same comb (c) paper bits picked up
4. 4.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
5. 5.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) an inclined plane (c) a pulley (d) a lever
6. 6.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is what we measure? (a) the time of day (b) the same spot (c) shadow length (d) the same stick
7. 7.🚀 Which of these goes forward? (a) air from the balloon (b) water a swimmer pushes (c) the balloon (d) water from the oars
8. 8.🧺 Do we need a sheet of white paper for the water rainbow? (a) not needed (b) needed
9. 9.🔮 Predict: you stop shaking after only one minute. What do you have? (a) ghee (b) cheese (c) still runny cream (d) butter lumps
10. 10.🧺 Three of these are needed for the paper bridge. Which one is NOT needed? (a) a ruler (b) coins (c) turmeric powder (d) sheets of paper
11. 11.🔍 Which is the odd one out? (a) paper with folded edges (b) a flat tissue (c) rolled paper tubes (d) a U-shaped channel
12. 12.🛟 Why should we wipe up spilled oil at once? (a) spilled oil is slippery (b) oil turns into honey (c) oil makes it rain (d) oil attracts magnets
13. 13.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? Which of these is the one thing we change? (a) sheets it pulls through (b) the magnet used (c) the kind of paper (d) the same paper clip
14. 14.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a pressure cooker (b) a rolling pin (c) a mathani (churner) (d) a sieve
15. 15.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? What do we do with “sheets it pulls through”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
17. 17.🫗 How do we separate salt from sea water? (a) sieving (b) handpicking (c) evaporating (d) filtering
18. 18.⚙️ Which simple machine is a steering wheel? (a) a lever (b) a pulley (c) an inclined plane (d) a wheel and axle
19. 19.True or false: writing the coin counts in a table is the observation step. (a) True (b) False
20. 20.🔮 Predict: which gives more drops in the bag — a hot sunny day or a cool cloudy day? (a) neither of them (b) the hot sunny day (c) the cool cloudy day (d) both the same
21. 21.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) reading the message (c) writing the message (d) ironing the paper
22. 22.🔬 In the scientific method, which step number is “make a hypothesis”?
23. 23.🧺 Three of these are needed for the magnet test. Which one is NOT needed? (a) a mirror (b) a tray (c) test objects (d) a results chart
24. 24.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: time to make butter is kept the same. (a) False (b) True
25. 25.True or false: a battery cell is needed for the shadow clock. (a) False (b) True
26. 26.True or false: make seeds is a job of the flower. (a) True (b) False
27. 27.🧺 Do we need a battery cell for the paper bridge? (a) not needed (b) needed
28. 28.🧺 Do we need a mirror for the paper helicopter? (a) needed (b) not needed
29. 29.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) the filter material (c) the same glass (d) how clear the water is
30. 30.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) a magnet (b) a spoon (c) water with food colour (d) cooking oil
31. 31.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? Which of these is the one thing we change? (a) the same comb (b) paper bits picked up (c) the paper bit size (d) number of rubs
32. 32.⚖️ Fair test — does the shape of a lump of clay change whether it floats? Which of these is kept the same? (a) whether it floats (b) the shape of the clay (c) the tub of water
33. 33.🛟 What should you wear for a long time in the hot sun? (a) nothing on your head (b) a cap or hat (c) a raincoat (d) a woollen sweater
34. 34.🔍 Which is the odd one out? (a) warmth (b) soil (c) sugar (d) sunlight
35. 35.🌈 In VIBGYOR, what number colour is orange?
36. 36.🛟 Does a glass marble float or sink in water? (a) sinks (b) floats
37. 37.True or false: asking an adult first is an unsafe habit. (a) False (b) True
38. 38.🔍 Which is the odd one out? (a) clean water (b) a book (c) clear glass (d) air
39. 39.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) the cream temperature (b) the amount of cream (c) time to make butter
40. 40.🥄 Does a big sugar cube dissolve faster or slower? (a) faster (b) slower

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