Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 26 · 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) a glass marble (b) an ice cube (c) honey (d) a coin
2. 2.📘 Why does a shadow form? (a) the ground is dark (b) the object is cold (c) light bends round it (d) an object blocks light
3. 3.🧺 Which of these is needed for the pendulum? (a) turmeric powder (b) a balloon (c) a heavy nut or washer (d) a mirror
4. 4.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
5. 5.True or false: vinegar turns turmeric reddish-brown. (a) True (b) False
6. 6.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
7. 7.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) the mud (b) the salt (c) nothing (d) the water
8. 8.🥄 Which of these dissolves in water? (a) chalk powder (b) sand (c) sawdust (d) glucose powder
9. 9.🧺 Do we need a balloon for the paper bridge? (a) not needed (b) needed
10. 10.🍞 Does yeast need warm water to make gas? (a) yeast does not need it (b) yeast needs it
11. 11.⚖️ Fair test — does a bowl in the sun make more drops than a bowl in the shade? Which of these is the one thing we change? (a) the size of the bowl (b) the time we wait (c) sun or shade (d) the amount of water
12. 12.🔬 How many steps are there in our scientific method (question to conclusion)?
13. 13.True or false: yeast is not needed for the density tower. (a) True (b) False
14. 14.⚖️ Fair test — does the amount of water in the glass change how bright the rainbow is? True or false: the amount of water is the one thing we change. (a) True (b) False
15. 15.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the same spot is kept the same. (a) False (b) True
16. 16.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
17. 17.🥛 Which of these works by air pressure? (a) a magnetic pin holder (b) a vacuum cleaner (c) a compass needle (d) a fridge magnet
18. 18.⚖️ Fair test — how does the shadow of a stick change through the day? Which of these is the one thing we change? (a) the time of day (b) the same spot (c) the stick kept upright (d) the same stick
19. 19.⚖️ Fair test — does the card stay on with a full glass and with a half-full glass? True or false: how full the glass is is kept the same. (a) True (b) False
20. 20.True or false: take in water from soil is a job of the roots. (a) False (b) True
21. 21.True or false: small test objects is needed for the float-or-sink test. (a) True (b) False
22. 22.🔍 Which is the odd one out? (a) puffed rice (b) a brick (c) a thin water stream (d) tiny paper bits
23. 23.🥄 Does sugar in icy water dissolve faster or slower? (a) slower (b) faster
24. 24.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold kills sugar (d) cold slows yeast down
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same muddy water (b) the amount poured (c) the filter material (d) the same funnel
26. 26.🍯 Which of these is denser than water? (a) honey (b) a ping-pong ball (c) a cork (d) air
27. 27.⚖️ Fair test — does the angle of the mirrors change how clearly you see? Which of these is what we measure? (a) how clear the view is (b) the same carton (c) the same light (d) the object we look at
28. 28.True or false: lemon juice is needed for the secret lemon message. (a) False (b) True
29. 29.True or false: turmeric powder is needed for the water rainbow. (a) True (b) False
30. 30.🧺 Which of these is not needed for the pendulum? (a) a string (b) a balloon (c) a pencil and tape (d) a ruler
31. 31.🔍 Which is the odd one out? (a) tying back long hair (b) washing hands afterwards (c) wiping up spills at once (d) working with no adult
32. 32.⚙️ Which simple machine is a well pulley? (a) a wheel and axle (b) a lever (c) a pulley (d) an inclined plane
33. 33.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the same paper is what we measure. (a) False (b) True
35. 35.🔮 Predict: you rub a balloon on dry hair and hold it on a wall. What happens? (a) it falls straight down (b) it sticks for a while (c) it turns into water (d) it bursts at once
36. 36.🧺 Do we need turmeric powder for the coloured flower experiment? (a) not needed (b) needed
37. 37.🎈 What is the job of the straw on the string? (a) it blows air in (b) it makes it heavier (c) it holds water (d) it guides the balloon
38. 38.🧺 Which of these is not needed for the water rainbow? (a) a sunny window (b) bright sunlight (c) a sheet of white paper (d) turmeric powder
39. 39.True or false: an empty capped bottle floats on water. (a) False (b) True
40. 40.⚖️ Fair test — does the shape of a lump of clay change whether it floats? What do we do with “the amount of clay”? (a) we change it (b) we measure it (c) we keep it the same

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