Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 7 · 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.⚖️ A ruler balances on a pencil at its middle. You place 1 coin 8 cm to the left of the pencil. How many coins must you place 2 cm to the right to balance it?
2. 2.🌈 In VIBGYOR, what number colour is indigo?
3. 3.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns yellow again (b) it disappears (c) it turns blue (d) it turns darker red
4. 4.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) water (b) a small bowl (c) a battery cell (d) moong seeds
5. 5.🛟 Is this a safe or an unsafe habit in an experiment: running with glassware? (a) safe (b) unsafe
6. 6.🔮 Predict: the Sun is low in the evening sky. The stick’s shadow is ___. (a) short (b) round (c) missing (d) long
7. 7.🧺 Do we need a results table for the float-or-sink test? (a) not needed (b) needed
8. 8.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) True (b) False
9. 9.🛟 Which of these sinks in water? (a) a feather (b) a steel spoon (c) a piece of thermocol (d) an ice cube
10. 10.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same bowls (b) the kind of seeds (c) wet or dry cotton (d) the same place
11. 11.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the paper clip”? (a) we measure it (b) we keep it the same (c) we change it
12. 12.🧺 Which of these is needed for the water rainbow? (a) a sheet of white paper (b) a balloon (c) turmeric powder (d) a magnet
13. 13.True or false: the balloon goes backward. (a) False (b) True
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) the same bottle (c) spoons of baking soda (d) the amount of vinegar
15. 15.🔦 Which of these is transparent? (a) oily paper (b) clean water (c) a brick (d) your hand
16. 16.🧺 Which of these is needed for the shadow clock? (a) a balloon (b) a magnet (c) yeast (d) a sunny open place
17. 17.True or false: cooking oil is less dense than water. (a) False (b) True
18. 18.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) lemon juice (d) baking soda water
19. 19.🍋 Secret message: who does this step — reading the message? (a) a child can do it (b) an adult does it
20. 20.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is the one thing we change? (a) the same light (b) how clear the view is (c) the object we look at (d) the angle of the mirrors
21. 21.🧺 Do we need a mirror for the card-on-a-glass trick? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a battery cell (c) turmeric powder (d) lemon juice
23. 23.🌱 Where does a sprouting seed get its first food from? (a) the cotton wool (b) the sunlight only (c) food stored in the seed (d) the air
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a shallow dish (c) a spoon (d) turmeric powder
25. 25.🧺 Which of these is needed for the water cycle bowl? (a) a battery cell (b) turmeric powder (c) a small cup (d) a mirror
26. 26.True or false: a seed is not needed for the fizzy balloon. (a) False (b) True
27. 27.🔍 Which is the odd one out? (a) a ball of clay (b) an ice cube (c) a pebble (d) an iron nail
28. 28.🔦 Is a book opaque, translucent or transparent? (a) transparent (b) translucent (c) opaque
29. 29.🌉 Does a zigzag-folded sheet make a strong or a weak bridge? (a) strong bridge (b) weak bridge
30. 30.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) blue (c) bright red (d) dark green
31. 31.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? What do we do with “the magnet used”? (a) we measure it (b) we keep it the same (c) we change it
32. 32.🧺 Three of these are needed for the paper helicopter. Which one is NOT needed? (a) safety scissors (b) a strip of paper (c) a ruler (d) a balloon
33. 33.True or false: tiny paper bits is not needed for the static comb. (a) False (b) True
34. 34.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a battery cell (d) a shallow dish
35. 35.🧺 Which of these is needed for the coloured flower experiment? (a) yeast (b) a magnet (c) a battery cell (d) a few hours of waiting
36. 36.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) both go up (c) the left side (d) the right side
37. 37.🔍 Which is the odd one out? (a) a strip of cloth (b) a steel spoon (c) a piece of chalk (d) a cotton thread
38. 38.🧺 Which of these is not needed for the fizzy balloon? (a) a tray for spills (b) a funnel or spoon (c) baking soda (d) a magnet
39. 39.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: the same hook is the one thing we change. (a) True (b) False
40. 40.🧺 Three of these are needed for the periscope. Which one is NOT needed? (a) a pencil (b) a ruler (c) two small mirrors (d) a magnet

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