Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 48 · 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) glucose powder (b) baking soda (c) chalk powder (d) table salt
2. 2.True or false: turmeric powder is needed for the leafy bag test. (a) False (b) True
3. 3.📘 Leaves have tiny holes that let out water vapour. What are they called? (a) veins (b) petals (c) roots (d) stomata
4. 4.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
5. 5.🧺 Do we need a tub of water for the float-or-sink test? (a) not needed (b) needed
6. 6.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: sun or shade is kept the same. (a) False (b) True
7. 7.🧺 Three of these are needed for the density tower. Which one is NOT needed? (a) water with food colour (b) a magnet (c) a tall clear glass (d) a spoon
8. 8.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
9. 9.True or false: gas from the rocket goes backward. (a) False (b) True
10. 10.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) the order of the layers (b) how much of each liquid (c) the order of pouring (d) the same three liquids
11. 11.🧺 Do we need yeast for the water rainbow? (a) needed (b) not needed
12. 12.🧺 Do we need a battery cell for the ruler lever? (a) needed (b) not needed
13. 13.🔭 At what angle are the mirrors set in a simple periscope? (a) 180 degrees (b) 10 degrees (c) 45 degrees (d) 90 degrees
14. 14.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) sugar (c) a tray for spills (d) a balloon
15. 15.🧺 Do we need a balloon for the paper helicopter? (a) not needed (b) needed
16. 16.🧲 Is a steel paper clip magnetic or non-magnetic? (a) non-magnetic (b) magnetic
17. 17.🔍 Which is the odd one out? (a) cooking oil (b) an ice cube (c) a coin (d) air
18. 18.🚀 Which of these goes forward? (a) air from the balloon (b) water a swimmer pushes (c) water from the oars (d) the rocket
19. 19.🎈 Air rushes out of the back of the balloon. Which way does the balloon move? (a) straight down (b) it stays still (c) backward (d) forward
20. 20.⚖️ Fair test — which kind of ball bounces highest? Which of these is what we measure? (a) the kind of ball (b) bounce height (c) the floor surface (d) the drop height
21. 21.🧺 Which of these is not needed for the secret lemon message? (a) a battery cell (b) white paper (c) a cotton bud (d) an adult with an iron
22. 22.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) baking soda (c) a battery cell (d) a tray for spills
23. 23.⚖️ Fair test — does a stronger magnet pull a paper clip through more sheets of paper? What do we do with “the kind of paper”? (a) we keep it the same (b) we measure it (c) we change it
24. 24.True or false: washing hands afterwards is a safe habit. (a) False (b) True
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) the amount poured (c) the filter material (d) how clear the water is
26. 26.⚙️ Which simple machine is a doorknob? (a) an inclined plane (b) a lever (c) a wheel and axle (d) a pulley
27. 27.True or false: a magnet is needed for the card-on-a-glass trick. (a) True (b) False
28. 28.True or false: warm water is needed for the yeast balloon. (a) False (b) True
29. 29.🔮 What would change if the flower stood in plain water? (a) the petals turn red (b) the flower glows (c) the stem turns blue (d) no colour change
30. 30.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the same spot is what we measure. (a) True (b) False
31. 31.🔍 Which is the odd one out? (a) a magnetic chess set (b) a bicycle pump (c) a magnetic pin holder (d) a fridge magnet
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the amount of vinegar”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🛟 Why should you stand back from a swinging pendulum? (a) it is hot (b) it is magnetic (c) it is wet (d) the bob could hit you
34. 34.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? What do we do with “whether the card stays”? (a) we keep it the same (b) we measure it (c) we change it
35. 35.True or false: a ruler is not needed for the paper bridge. (a) True (b) False
36. 36.🏗️ Which of these gets its strength from triangles? (a) a temple dome (b) a bridge truss (c) a round pillar (d) an eggshell
37. 37.🧺 Which of these is needed for the leafy bag test? (a) vinegar (b) a magnet (c) a few hours (d) turmeric powder
38. 38.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same funnel is the one thing we change. (a) True (b) False
39. 39.🫗 How do we separate mud from water? (a) evaporating (b) winnowing (c) sieving (d) filtering
40. 40.True or false: a magnetic chess set works by magnetism. (a) False (b) True

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