Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 75 · 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.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
2. 2.💧 Which of these does not let water climb? (a) a paper towel (b) a sugar cube (c) a rubber eraser (d) a piece of chalk
3. 3.🧈 Which tool is used in many Indian homes to churn curd into butter? (a) a rolling pin (b) a mathani (churner) (c) a pressure cooker (d) a sieve
4. 4.🧺 Do we need a small bowl for sprouting seeds? (a) needed (b) not needed
5. 5.🧺 Do we need water for the water cycle bowl? (a) needed (b) not needed
6. 6.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) reddish (d) bright blue
7. 7.⚖️ 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 time of day (b) the same glass (c) brightness of rainbow (d) the same white paper
8. 8.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “the length of the blades”? (a) we keep it the same (b) we change it (c) we measure it
9. 9.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) cotton or cloth (c) a clean glass (d) a magnet
10. 10.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) sugar (b) warm water (c) cold water (d) a balloon
11. 11.💧 Which change is this: ice becoming water? (a) melting (b) freezing (c) condensation (d) evaporation
12. 12.🧺 Which of these is needed for the secret lemon message? (a) a battery cell (b) white paper (c) yeast (d) turmeric powder
13. 13.🔦 Which of these is transparent? (a) a steel plate (b) tissue paper (c) your hand (d) clear glass
14. 14.🔭 How many mirrors does a simple periscope use?
15. 15.🔮 Predict: you blow the balloon up only a little. What happens? (a) it goes less far (b) it flies off the string (c) it turns into a kite (d) it goes much farther
16. 16.🫗 Which of these is done by winnowing? (a) husk from rice grain (b) gravel from fine sand (c) bad grains from rice (d) small stones from dal
17. 17.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? What do we do with “the order of the layers”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.🧺 Which of these is needed for the fizzy balloon? (a) a seed (b) a magnet (c) a funnel or spoon (d) a mirror
19. 19.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
20. 20.🚁 Which of these falls slowly through the air? (a) a steel spoon (b) a feather (c) a stone (d) a crumpled paper ball
21. 21.🔦 Is butter paper opaque, translucent or transparent? (a) opaque (b) transparent (c) translucent
22. 22.🧺 Three of these are needed for the water cycle bowl. Which one is NOT needed? (a) cling film (b) ice cubes (c) a battery cell (d) a big bowl
23. 23.🔍 Which is the odd one out? (a) a mirror (b) black cloth (c) a shiny steel plate (d) still clear water
24. 24.🚀 Which of these goes backward? (a) the balloon (b) air from the balloon (c) the rocket (d) the swimmer
25. 25.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) roots (c) stomata (d) petals
26. 26.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) a pencil (d) yeast
27. 27.🍯 Is very salty water denser or less dense than water? (a) denser than water (b) less dense than water
28. 28.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) spoons of baking soda (c) the same bottle
29. 29.🧺 Which of these is needed for the static comb? (a) turmeric powder (b) a mirror (c) a magnet (d) tiny paper bits
30. 30.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the kind of juice (b) how dark the writing is (c) the ironing time
31. 31.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) water gets lighter (c) pulling down is easier (d) the rope gets shorter
32. 32.🧈 Why does shaking cream make butter? (a) the jar adds butter (b) the lid is warm (c) shaking adds salt (d) fat bits stick together
33. 33.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
34. 34.🧲 Which of these push apart? (a) north near south (b) south near north (c) north near north
35. 35.🧺 Which of these is not needed for the water rainbow? (a) a balloon (b) a sheet of white paper (c) a sunny window (d) a clear glass of water
36. 36.🔭 Why must the two mirrors face each other and be parallel? (a) so it looks shiny (b) so it can float (c) so light reaches the eye (d) to make it heavy
37. 37.True or false: bright sunlight is needed for the water rainbow. (a) True (b) False
38. 38.🔮 Predict: you fold the two blades the other way. What changes? (a) it falls upward (b) it spins the other way (c) it turns blue (d) it does not fall
39. 39.⚖️ 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 change it (c) we keep it the same
40. 40.🛟 There is lightning outside. Where is it safest to be? (a) on a rooftop (b) in an open field (c) indoors (d) under a tall tree

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