Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 34 · 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.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) a teaspoon (c) a mirror (d) warm water
2. 2.🌈 In VIBGYOR, what number colour is red?
3. 3.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? Which of these is what we measure? (a) the same white paper (b) the same window (c) the amount of water (d) brightness of rainbow
4. 4.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) eat a few to check (b) throw them at friends (c) never put seeds in mouth (d) feed them to pets
5. 5.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “time for colour to show”? (a) we keep it the same (b) we measure it (c) we change it
6. 6.🔮 Predict: you make more, closer zigzag folds. The bridge holds ___ coins. (a) zero (b) fewer (c) the same number of (d) more
7. 7.🛟 Who should trim the flower stem? (a) a grown-up (b) a toddler (c) a pet (d) anyone, without looking
8. 8.True or false: a balloon is not needed for the yeast balloon. (a) False (b) True
9. 9.🔍 Which is the odd one out? (a) a rubber eraser (b) a sewing needle (c) a steel paper clip (d) iron filings
10. 10.🔭 Which of these reflects light well? (a) a mirror (b) a dull brick (c) dark soil (d) a rough wooden board
11. 11.True or false: a small bowl is needed for the secret lemon message. (a) True (b) False
12. 12.🔮 A flat sheet and a crumpled ball of the same paper drop together. Which lands first? (a) a sheet of glass (b) the flat sheet (c) the crumpled ball (d) neither of them
13. 13.🔍 Sand is stirred into water. What do you see after a while? (a) it turns blue (b) it floats up (c) it dissolves (d) it settles at the bottom
14. 14.🔍 Which is the odd one out? (a) water (b) sugar (c) salt (d) sunlight
15. 15.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sip each liquid (c) sniff each bottle hard (d) use only kitchen items
16. 16.True or false: curd is a base. (a) True (b) False
17. 17.True or false: a small cup is not needed for the water cycle bowl. (a) False (b) True
18. 18.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? What do we do with “the amount of water”? (a) we keep it the same (b) we change it (c) we measure it
19. 19.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the same cup of coins (b) the lifting height (c) the same string (d) number of pulleys
20. 20.🧲 Two magnets: south near south. Do they pull together or push apart? (a) pull together (b) push apart
21. 21.🛟 Who should pour the warm water in the dissolving test? (a) a grown-up (b) a friend who is running (c) nobody needs to (d) the youngest child
22. 22.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) a small bottle (c) a balloon (d) a comb
23. 23.🧺 Three of these are needed for the static comb. Which one is NOT needed? (a) a balloon (b) tiny paper bits (c) a plastic comb (d) turmeric powder
24. 24.🧺 Which of these is needed for the leafy bag test? (a) a mirror (b) a battery cell (c) a few hours (d) a magnet
25. 25.💧 Which of these is freezing? (a) ice becoming water (b) a puddle drying up (c) sweat drying on skin (d) a pond icing over
26. 26.True or false: yeast is not needed for the water rainbow. (a) False (b) True
27. 27.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) easier (b) harder (c) the same (d) impossible
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the same jar (b) the amount of cream (c) time to make butter (d) how hard we shake
29. 29.🧺 Which of these is not needed for the magnet test? (a) test objects (b) a battery cell (c) a tray (d) a bar magnet
30. 30.🧺 Three of these are needed for the magnet test. Which one is NOT needed? (a) test objects (b) a tray (c) a results chart (d) a balloon
31. 31.🧺 Three of these are needed for the float-or-sink test. Which one is NOT needed? (a) a tub of water (b) a results table (c) a balloon (d) a towel for spills
32. 32.True or false: a magnet is not needed for the paper bridge. (a) True (b) False
33. 33.🧺 Do we need a balloon for the pendulum? (a) needed (b) not needed
34. 34.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) sunlight (c) a battery cell (d) a few hours
35. 35.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) coins as the load (c) a small paper cup (d) a balloon
36. 36.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
37. 37.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) no, never (b) they melt (c) they turn to stones (d) yes, they sprout
38. 38.🌈 How many colours do we name in a rainbow (VIBGYOR)?
39. 39.🧺 Which of these is not needed for the ruler lever? (a) a 30 cm ruler (b) a flat table (c) a mirror (d) coins of one kind
40. 40.True or false: a feather falls slowly through the air. (a) True (b) False

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