Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 58 · 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.🔮 What happens if a cloud covers the Sun during the rainbow experiment? (a) it floats away (b) it turns all red (c) it turns brighter (d) the rainbow fades
2. 2.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) baking a cake (c) melting butter (d) freezing water
3. 3.True or false: a pencil is not needed for the paper helicopter. (a) False (b) True
4. 4.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “time for 10 swings”? (a) we measure it (b) we change it (c) we keep it the same
5. 5.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: time to dissolve is what we measure. (a) False (b) True
6. 6.💧 Dip a piece of chalk into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
7. 7.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we keep it the same (b) we measure it (c) we change it
8. 8.True or false: a hollow bird bone gets its strength from a tube shape. (a) True (b) False
9. 9.🔮 Predict: you drop a bar magnet on the floor many times. What happens? (a) it becomes heavier (b) it turns to copper (c) it gets stronger (d) it gets weaker
10. 10.⚖️ Fair test — which paper shape holds the most coins? What do we do with “the shape of the paper”? (a) we change it (b) we keep it the same (c) we measure it
11. 11.True or false: clear plastic film is opaque. (a) False (b) True
12. 12.True or false: sugar is something yeast needs. (a) False (b) True
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the same bottles (b) size of the balloon (c) the amount of sugar (d) the amount of water
14. 14.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) only an adult (c) whoever is fastest (d) the youngest child
15. 15.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) sugar water (d) detergent water
16. 16.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? Which of these is kept the same? (a) time to reach the floor (b) the length of the blades (c) the kind of paper
17. 17.🛟 Who should cut the holes in the juice carton? (a) the youngest child (b) nobody needs to (c) a grown-up (d) a friend who is running
18. 18.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) neither of them (b) the sugar cube (c) powdered sugar (d) both the same
19. 19.🔦 Which of these is opaque? (a) a book (b) clean water (c) clear plastic film (d) tissue paper
20. 20.True or false: sunlight is needed for the water cycle bowl. (a) False (b) True
21. 21.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if cooled (c) yes, in the dark (d) yes, if shaken
22. 22.🫗 Which of these is done by evaporating? (a) gravel from fine sand (b) bran from wheat flour (c) small stones from dal (d) sugar from sugar water
23. 23.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
24. 24.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the same white paper is what we measure. (a) False (b) True
25. 25.⚙️ Which simple machine is a bottle opener? (a) a pulley (b) a lever (c) an inclined plane (d) a wheel and axle
26. 26.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? Which of these is what we measure? (a) time for colour to show (b) the length of the stem (c) the kind of flower (d) the amount of colour
27. 27.⚖️ Fair test — do longer blades make the paper helicopter fall more slowly? What do we do with “time to reach the floor”? (a) we change it (b) we measure it (c) we keep it the same
28. 28.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) physical (c) magnetic (d) musical
29. 29.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) rusting iron (c) melting butter (d) browning lemon ink
30. 30.🛟 Why is a plastic cup safer than a glass for small children here? (a) it is hotter (b) it will not break (c) it is heavier (d) it is magnetic
31. 31.🔦 Which of these is transparent? (a) your hand (b) tissue paper (c) air (d) oily paper
32. 32.🧺 Which of these is needed for making butter? (a) a mirror (b) a battery cell (c) cold water to rinse (d) a balloon
33. 33.True or false: turmeric powder is not needed for the pendulum. (a) True (b) False
34. 34.🌈 In VIBGYOR, what number colour is red?
35. 35.True or false: ice becoming water is melting. (a) False (b) True
36. 36.🧺 Three of these are needed for the dissolving test. Which one is NOT needed? (a) cold water (b) sugar (c) a mirror (d) a clock or timer
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
38. 38.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “how clear the water is”? (a) we keep it the same (b) we change it (c) we measure it
39. 39.🌼 Why do the petals keep pulling water up the stem? (a) the stem is hot (b) petals like colour (c) petals lose water to air (d) petals are magnetic
40. 40.🛟 Which of these floats on water? (a) a pebble (b) a dry leaf (c) a coin (d) a glass marble

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