Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 29 · 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 is the odd one out? (a) cooking oil (b) food colour (c) table salt (d) sugar
2. 2.True or false: a tray for spills is needed for the fizzy balloon. (a) False (b) True
3. 3.🔍 Which is the odd one out? (a) a sugar cube (b) a glass marble (c) a piece of foil (d) a steel spoon
4. 4.🧺 Do we need a sunny window for the water rainbow? (a) not needed (b) needed
5. 5.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we keep it the same (b) we measure it (c) we change it
6. 6.🔍 Which is the odd one out? (a) soil (b) air (c) salt (d) sugar
7. 7.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the same cotton bud (c) the iron setting (d) the same paper
8. 8.⚖️ A child tests plants with and without water, but puts one in the sun and one in a cupboard. Is it a fair test? (a) yes, it is fair (b) yes, if done fast (c) only on Sundays (d) no, two things changed
9. 9.🔮 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
10. 10.⚖️ 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
11. 11.💧 Which of these is freezing? (a) butter going runny (b) a pond icing over (c) ice becoming water (d) wet clothes drying
12. 12.🧺 Which of these is needed for the paper bridge? (a) coins (b) a balloon (c) turmeric powder (d) a battery cell
13. 13.True or false: small test objects is not needed for the float-or-sink test. (a) False (b) True
14. 14.🧺 Do we need a balloon for the card-on-a-glass trick? (a) not needed (b) needed
15. 15.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is the one thing we change? (a) the kind of coins (b) where the pencil is (c) distance from the pencil (d) the number of coins
16. 16.🛟 Why should you not wrap the string around your finger? (a) it gets wet (b) it can hurt your finger (c) it turns blue (d) it gets longer
17. 17.🔍 Which is the odd one out? (a) a puddle drying up (b) a misty bathroom mirror (c) drops on a cold glass (d) dew on morning grass
18. 18.True or false: coins of one kind is needed for the ruler lever. (a) True (b) False
19. 19.🔮 Predict: you add two more paper clips. How does it fall? (a) it floats up (b) faster (c) it stops in the air (d) slower
20. 20.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
21. 21.🛟 Where is a safe place to drop the helicopter from? (a) a wobbly chair (b) from your raised hand (c) a roof edge (d) a high window ledge
22. 22.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) down (b) sideways (c) up (d) in a circle
23. 23.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
24. 24.🧺 Do we need yeast for the float-or-sink test? (a) not needed (b) needed
25. 25.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) reddish-brown (b) it turns green (c) it turns blue (d) it stays yellow
26. 26.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) coins of one kind (b) a mirror (c) a flat table (d) a round pencil
27. 27.🔍 Which is the odd one out? (a) working with no adult (b) touching a hot iron (c) asking an adult first (d) putting things in mouth
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is what we measure. (a) True (b) False
29. 29.🔮 Why do we try the card trick over a sink or a bucket? (a) to make it rain (b) to cool the glass (c) to catch any spills (d) to grow plants
30. 30.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the water temperature (c) the amount of yeast
31. 31.🧺 Do we need soap solution for the turmeric test? (a) needed (b) not needed
32. 32.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
33. 33.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) yeast (b) an adult with an iron (c) lemon juice (d) white paper
34. 34.🔭 How many times does light bounce off a mirror in a simple periscope?
35. 35.🛟 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) feed them to pets (d) never put seeds in mouth
36. 36.🔍 You turn the full glass upside down, holding the card, then let go of the card. What happens? (a) the card flies away (b) the water turns to ice (c) the card stays on (d) the glass breaks
37. 37.🫗 Is filtered pond water safe to drink? (a) yes, always (b) yes, if it is clear (c) yes, if it is cold (d) no, germs may stay
38. 38.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) a magnet (c) string (d) a pencil
39. 39.True or false: a pencil is not needed for the paper helicopter. (a) True (b) False
40. 40.True or false: a hollow bird bone gets its strength from triangles. (a) True (b) False

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