Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 6 · 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.🔮 Predict: you move the pencil (fulcrum) nearer the coins you want to lift. Lifting gets ___. (a) the same (b) harder (c) easier (d) impossible
2. 2.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
3. 3.🛟 Why should a grown-up watch when children play near a big tub of water? (a) to hide the corks (b) to win a prize (c) to splash everyone (d) to keep children safe
4. 4.True or false: cooking an egg is a change that can be undone. (a) True (b) False
5. 5.🧲 Which of these is not pulled by a magnet? (a) an iron nail (b) a copper wire (c) a safety pin (d) a sewing needle
6. 6.📘 What is yeast? (a) a kind of stone (b) a tiny living fungus (c) a kind of sugar (d) a kind of salt
7. 7.🛟 Where should you do the card-and-glass trick? (a) over a laptop (b) on a bed (c) over a sink or bucket (d) near a plug point
8. 8.True or false: melting butter is a change that can be undone. (a) False (b) True
9. 9.💧 Which of these is melting? (a) making ice lollies (b) ice becoming water (c) wet hair drying (d) a puddle drying up
10. 10.True or false: small stones from dal is done by winnowing. (a) True (b) False
11. 11.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) the same kind of bag (b) the kind of plant (c) sun or shade (d) the time we wait
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
13. 13.🌱 Seeds need water, air and ___ to sprout. (a) soil (b) sugar (c) warmth (d) salt
14. 14.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) yeast (b) a stiff postcard (c) a sink or a bucket (d) a glass of water
15. 15.True or false: very salty water is less dense than water. (a) False (b) True
16. 16.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.True or false: rusting iron is a change that can be undone. (a) True (b) False
18. 18.🥚 A fresh egg sinks in plain water. What makes it float? (a) a little shaking (b) a few ice cubes (c) more plain water (d) lots of salt stirred in
19. 19.⚖️ Fair test — how does the shadow of a stick change through the day? True or false: the stick kept upright is the one thing we change. (a) True (b) False
20. 20.True or false: a bottle opener is an inclined plane. (a) False (b) True
21. 21.🧺 Do we need two clear glasses for the dissolving test? (a) not needed (b) needed
22. 22.🧺 Three of these are needed for the shadow clock. Which one is NOT needed? (a) a magnet (b) a clock to check (c) chalk to mark shadows (d) a sunny open place
23. 23.🛟 What should you do with popped balloon pieces? (a) keep them in your mouth (b) give them to a baby (c) chew them (d) throw them away safely
24. 24.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
25. 25.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
26. 26.🧺 Which of these is not needed for the density tower? (a) honey (b) a spoon (c) water with food colour (d) a magnet
27. 27.⚙️ Which of these is a wheel and axle? (a) a sloping road (b) a flagpole (c) a tap handle (d) a ramp
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) yeast (c) muddy water (d) a clean glass
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) warm water (c) yeast (d) a mirror
31. 31.⚡ Which of these jumps to a charged comb? (a) a heavy book (b) a pebble (c) puffed rice (d) a brick
32. 32.🔍 Which is the odd one out? (a) an iron nail (b) a steel spoon (c) a pebble (d) a ping-pong ball
33. 33.🛟 How should you check if the sugar has dissolved? (a) look for leftover grains (b) taste it (c) smell it closely (d) poke it with a finger
34. 34.True or false: a clock or timer is not needed for the dissolving test. (a) True (b) False
35. 35.⚖️ Fair test — does rubbing the comb more times pick up more paper bits? Which of these is kept the same? (a) paper bits picked up (b) number of rubs (c) the same comb
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) string (c) yeast (d) coins as the load
37. 37.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) vinegar (b) a balloon (c) a funnel or spoon (d) a comb
38. 38.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) an empty thread reel (c) a small paper cup (d) yeast
39. 39.🛟 Why should only a grown-up handle any hot water? (a) it changes colour (b) hot water is heavy (c) hot water can scald (d) hot water is magnetic
40. 40.True or false: a 30 cm ruler is needed for the ruler lever. (a) False (b) True

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