Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 52 · 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 of these is a safe habit? (a) mixing random liquids (b) wiping up spills at once (c) working with no adult (d) putting things in mouth
2. 2.🌉 Does paper with folded edges make a strong or a weak bridge? (a) strong bridge (b) weak bridge
3. 3.🏗️ Where does a hollow bird bone get its strength from? (a) arches and domes (b) tubes (c) triangles
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a battery cell (c) a spoon (d) a mirror
5. 5.True or false: puffed rice jumps to a charged comb. (a) True (b) False
6. 6.🧺 Do we need a mirror for the secret lemon message? (a) needed (b) not needed
7. 7.🔍 Which is the odd one out? (a) sugar (b) warmth (c) air (d) water
8. 8.True or false: turmeric powder is needed for making butter. (a) False (b) True
9. 9.🔮 Predict: 2 coins sit 5 cm left of the pencil and 2 coins sit 10 cm right of it. Which side goes down? (a) neither, it balances (b) the right side (c) both go up (d) the left side
10. 10.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it turns green (c) it stays yellow (d) reddish-brown
11. 11.True or false: frosted glass is opaque. (a) True (b) False
12. 12.🧺 Do we need a sunny open place for the shadow clock? (a) needed (b) not needed
13. 13.🛟 Which of these is an unsafe habit? (a) wiping up spills at once (b) asking an adult first (c) washing hands afterwards (d) working with no adult
14. 14.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) baking soda (b) a seed (c) a tray for spills (d) a funnel or spoon
15. 15.⚖️ Fair test — does the angle of the mirrors change how clearly you see? True or false: the angle of the mirrors is kept the same. (a) False (b) True
16. 16.💧 Dip a glass marble into coloured water. Does the water climb up it? (a) water does not climb (b) water climbs up it
17. 17.🧺 Which of these is not needed for the coloured flower experiment? (a) a few hours of waiting (b) food colour (c) a white flower (d) turmeric powder
18. 18.🧺 Do we need a towel for the card-on-a-glass trick? (a) not needed (b) needed
19. 19.🧺 Do we need a mirror for the muddy water filter? (a) not needed (b) needed
20. 20.🥛 Does a suction hook work by air pressure or by magnetism? (a) magnetism (b) air pressure
21. 21.🚁 Why does the paper helicopter fall slowly? (a) a magnet holds it (b) air pushes on its blades (c) the floor pushes it (d) it has no weight
22. 22.🧺 Which of these is needed for the dissolving test? (a) a comb (b) a balloon (c) a clock or timer (d) cotton wool
23. 23.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) the kind of balloon (b) spoons of baking soda (c) size of the balloon (d) the same bottle
24. 24.🔮 What would change if the flower stood in plain water? (a) no colour change (b) the flower glows (c) the stem turns blue (d) the petals turn red
25. 25.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is what we measure. (a) False (b) True
26. 26.🌈 In VIBGYOR, what number colour is indigo?
27. 27.🧺 Do we need cooking oil for the density tower? (a) not needed (b) needed
28. 28.🫧 Which of these is an acid? (a) detergent water (b) plain water (c) salt water (d) vinegar
29. 29.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the tub of water is the one thing we change. (a) False (b) True
30. 30.⚖️ Fair test — does a bigger balloon go farther along the string? True or false: distance it travels is what we measure. (a) True (b) False
31. 31.⚙️ Which of these is an inclined plane? (a) a tap handle (b) a ramp (c) a well pulley (d) a spoon lifting a lid
32. 32.🔮 Predict: you blow up a balloon. What fills it? (a) air (b) water (c) smoke (d) sand
33. 33.🫗 How do we separate chaff from wheat grain? (a) sieving (b) winnowing (c) evaporating (d) handpicking
34. 34.🧺 Which of these is not needed for the leafy bag test? (a) a potted plant (b) yeast (c) sunlight (d) a clear plastic bag
35. 35.True or false: a glass marble is not pulled by a magnet. (a) False (b) True
36. 36.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) an adult with an iron (b) a cotton bud (c) yeast (d) lemon juice
37. 37.🔮 Predict: which dissolves faster — a sugar cube or the same amount of powdered sugar? (a) powdered sugar (b) neither of them (c) both the same (d) the sugar cube
38. 38.🫧 Is salt water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
39. 39.🍯 Is a coin denser or less dense than water? (a) denser than water (b) less dense than water
40. 40.True or false: an ice cube sinks in water. (a) False (b) True

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids