Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 22 · 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.True or false: a balloon is not needed for the float-or-sink test. (a) True (b) False
2. 2.True or false: warm water is something yeast needs. (a) True (b) False
3. 3.True or false: table salt does not dissolve in water. (a) True (b) False
4. 4.True or false: sunlight is needed for a seed to sprout. (a) False (b) True
5. 5.🧺 Do we need a heavy nut or washer for the pendulum? (a) not needed (b) needed
6. 6.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) lick your fingers (c) skip washing (d) wash your hands
7. 7.🧺 Do we need a mirror for the thread-reel pulley? (a) not needed (b) needed
8. 8.🧺 Which of these is needed for the yeast balloon? (a) a magnet (b) turmeric powder (c) a battery cell (d) dry yeast
9. 9.🕰️ What is a sundial used for? (a) measuring rain (b) telling the time (c) making rainbows (d) weighing things
10. 10.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) add baking soda (c) rinse with clean water (d) rub it hard
11. 11.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is the one thing we change. (a) False (b) True
12. 12.🌼 How does coloured water reach the petals? (a) it rains on them (b) it is sprayed on (c) through tiny stem tubes (d) through the air
13. 13.💧 Which of these lets water climb up it? (a) a paper towel (b) a rubber eraser (c) a piece of foil (d) a glass marble
14. 14.True or false: two clear glasses is not needed for the dissolving test. (a) False (b) True
15. 15.True or false: a stiff postcard is not needed for the card-on-a-glass trick. (a) True (b) False
16. 16.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the time of day is what we measure. (a) False (b) True
17. 17.❓ Which question can be tested by an experiment? (a) do magnets pull iron? (b) who is the best friend? (c) which colour is nicest? (d) is music beautiful?
18. 18.🔍 Which is the odd one out? (a) a strip of cloth (b) a cotton thread (c) a steel spoon (d) a piece of chalk
19. 19.True or false: “Warm took 1 minute, cold took 4.” is the observation step. (a) False (b) True
20. 20.True or false: sawdust does not dissolve in water. (a) True (b) False
21. 21.⚙️ Which simple machine is a bottle opener? (a) an inclined plane (b) a pulley (c) a lever (d) a wheel and axle
22. 22.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) there is no change (c) it turns blue (d) it grows bigger
23. 23.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same mirrors”? (a) we measure it (b) we keep it the same (c) we change it
24. 24.🔍 Which is the odd one out? (a) salt water (b) soap solution (c) baking soda water (d) detergent water
25. 25.🧺 Which of these is needed for the paper helicopter? (a) turmeric powder (b) a ruler (c) a battery cell (d) a mirror
26. 26.True or false: tea leaves from tea is done by filtering. (a) True (b) False
27. 27.🔍 Which is the odd one out? (a) warmth (b) water (c) soil (d) air
28. 28.🫗 Is filtered pond water safe to drink? (a) no, germs may stay (b) yes, if it is cold (c) yes, if it is clear (d) yes, always
29. 29.🧺 Do we need a balloon for the water cycle bowl? (a) not needed (b) needed
30. 30.True or false: warm water is needed for growing salt crystals. (a) True (b) False
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we change it (b) we keep it the same (c) we measure it
32. 32.True or false: iron filings is pulled by a magnet. (a) True (b) False
33. 33.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the same stick is the one thing we change. (a) False (b) True
34. 34.🧂 Does sawdust dissolve in water? (a) dissolves in water (b) does not dissolve
35. 35.🧺 Which of these is needed for the density tower? (a) a balloon (b) cooking oil (c) a magnet (d) a mirror
36. 36.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) skip washing (c) rub your eyes (d) wash your hands
37. 37.True or false: north near north pull together. (a) False (b) True
38. 38.True or false: a battery cell is needed for the water rainbow. (a) False (b) True
39. 39.🔮 Predict: the Sun is low in the evening sky. The stick’s shadow is ___. (a) short (b) round (c) long (d) missing
40. 40.⚖️ Fair test — does a bigger balloon go farther along the string? What do we do with “how big we blow it”? (a) we measure it (b) we change it (c) we keep it the same

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