Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 70 · 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 should you do after handling muddy water? (a) lick your fingers (b) wash hands afterwards (c) nothing is needed (d) wipe hands on face
2. 2.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it turns to stone (b) it sinks faster (c) it can float (d) it dissolves
3. 3.True or false: a sunny open place is not needed for the shadow clock. (a) False (b) True
4. 4.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) a white party dress (c) an old shirt or apron (d) your school uniform
5. 5.🛟 Why should you never stand under a load being lifted? (a) it is magnetic (b) it gets hot (c) it might sing (d) it could fall on you
6. 6.🍋 Secret message: who does this step — putting the iron away? (a) a child can do it (b) an adult does it
7. 7.⚖️ Fair test — does a bigger balloon go farther along the string? Which of these is kept the same? (a) distance it travels (b) how big we blow it (c) the same string
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the turmeric paper
9. 9.🌈 How many colours do we name in a rainbow (VIBGYOR)?
10. 10.True or false: a piece of foil lets water climb up it. (a) False (b) True
11. 11.True or false: “So folding makes paper stronger.” is the conclusion step. (a) False (b) True
12. 12.🎈 What blows up the balloon in the yeast experiment? (a) air from outside (b) carbon dioxide gas (c) smoke (d) steam
13. 13.🧺 Do we need an empty thread reel for the thread-reel pulley? (a) needed (b) not needed
14. 14.⚖️ Fair test — does the angle of the mirrors change how clearly you see? What do we do with “the same carton”? (a) we change it (b) we measure it (c) we keep it the same
15. 15.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the floor surface”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
17. 17.True or false: food colour is not needed for the coloured flower experiment. (a) True (b) False
18. 18.True or false: salt is needed for growing salt crystals. (a) False (b) True
19. 19.🛟 How should the plastic bag be tied around the branch? (a) as tight as possible (b) gently, not too tight (c) with sharp wire (d) with a hot glue gun
20. 20.🔍 Which is the odd one out? (a) food colour (b) baking soda (c) glucose powder (d) cooking oil
21. 21.⚖️ Fair test — does sugar dissolve faster in warm water or in cold water? Which of these is kept the same? (a) time to dissolve (b) the water temperature (c) the stirring
22. 22.🧺 Do we need a flat table for the ruler lever? (a) needed (b) not needed
23. 23.🥛 What holds the card up against the upside-down glass? (a) glue on the card (b) the cold water (c) air pushing up (d) a magnet
24. 24.⚖️ Fair test — does a longer string make the pendulum swing more slowly? What do we do with “the string length”? (a) we measure it (b) we change it (c) we keep it the same
25. 25.🚢 Why can a heavy steel ship float on the sea? (a) sea water is warm (b) it has a magnet (c) steel is very light (d) its hollow shape
26. 26.True or false: a well pulley is a lever. (a) True (b) False
27. 27.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a glass of water (b) turmeric powder (c) a towel (d) a sink or a bucket
28. 28.🛟 What is a safe way to use a ruler as a lever? (a) stand on the ruler (b) bend it till it snaps (c) flick coins at faces (d) press it gently
29. 29.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
30. 30.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) both the same (b) powdered sugar (c) neither of them (d) the sugar cube
31. 31.🔍 Which is the odd one out? (a) honey (b) very salty water (c) an ice cube (d) a glass marble
32. 32.🧲 Which of these is not pulled by a magnet? (a) a glass marble (b) a sewing needle (c) a safety pin (d) iron filings
33. 33.🛟 Is this a safe or an unsafe habit in an experiment: putting things in mouth? (a) unsafe (b) safe
34. 34.🔍 Which is the odd one out? (a) a ping-pong ball (b) an iron nail (c) an ice cube (d) an empty capped bottle
35. 35.💧 Which of these does not let water climb? (a) a strip of cloth (b) a piece of chalk (c) a cotton thread (d) a rubber eraser
36. 36.⚖️ Fair test — does a longer string make the pendulum swing more slowly? True or false: time for 10 swings is the one thing we change. (a) False (b) True
37. 37.🧺 Do we need a bar magnet for the magnet test? (a) needed (b) not needed
38. 38.🔍 Which is the odd one out? (a) air (b) sunlight (c) water (d) warmth
39. 39.⚙️ Which simple machine is a see-saw? (a) an inclined plane (b) a wheel and axle (c) a pulley (d) a lever
40. 40.True or false: a bicycle pump works by air pressure. (a) True (b) False

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