Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 50 · 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.🛟 Why should you not over-blow the balloon? (a) it turns into a kite (b) it gets too heavy (c) it can pop loudly (d) it changes colour
2. 2.True or false: a potted plant is not needed for the leafy bag test. (a) True (b) False
3. 3.🧺 Do we need turmeric powder for the balloon rocket? (a) needed (b) not needed
4. 4.🔮 Predict: you fold the two blades the other way. What changes? (a) it spins the other way (b) it falls upward (c) it turns blue (d) it does not fall
5. 5.🌈 In VIBGYOR, what number colour is blue?
6. 6.🧺 Do we need a battery cell for making butter? (a) needed (b) not needed
7. 7.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
8. 8.🔮 Predict: you wet the comb before trying again. What happens? (a) it becomes a magnet (b) it works better (c) it hardly works (d) it lights up
9. 9.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is what we measure. (a) True (b) False
10. 10.🧺 Three of these are needed for the magnet test. Which one is NOT needed? (a) a results chart (b) test objects (c) a bar magnet (d) yeast
11. 11.🔮 Predict: a charged comb is held near a thin stream of tap water. What happens? (a) the water freezes (b) nothing at all (c) the water stops (d) the stream bends
12. 12.🔮 A ball of clay sinks. What happens if you press it into a thin boat shape? (a) it dissolves (b) it can float (c) it turns to stone (d) it sinks faster
13. 13.🧲 Where is a bar magnet’s pull strongest? (a) nowhere (b) at its two poles (c) in the middle (d) everywhere the same
14. 14.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it stays yellow (c) reddish-brown (d) it turns blue
15. 15.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is magnetic (c) it is heavier (d) it is hotter
16. 16.🔮 Predict: seeds on wet cotton are kept in a dark cupboard. Will they sprout? (a) yes, they sprout (b) no, never (c) they melt (d) they turn to stones
17. 17.🛟 Which rule keeps the density tower experiment safe? (a) throw the glass (b) do not lick the spoon (c) taste each layer (d) pour it on the floor
18. 18.🔍 Which is the odd one out? (a) freezing water (b) folding paper (c) melting butter (d) baking a cake
19. 19.🔮 Predict: tea is poured through a strainer. What happens to the tea leaves? (a) tea stays behind (b) leaves pass through (c) both stay behind (d) leaves stay behind
20. 20.🧺 Do we need a tall clear glass for the density tower? (a) not needed (b) needed
21. 21.🧺 Which of these is needed for the water cycle bowl? (a) turmeric powder (b) a mirror (c) a big bowl (d) a balloon
22. 22.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
23. 23.True or false: running with glassware is an unsafe habit. (a) False (b) True
24. 24.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: the shape of the clay is the one thing we change. (a) False (b) True
25. 25.🛟 What should you do with wet floors after the experiment? (a) pour more water (b) slide on them (c) wipe them dry (d) leave them wet
26. 26.📘 Why does a shadow form? (a) an object blocks light (b) the ground is dark (c) light bends round it (d) the object is cold
27. 27.True or false: sugar in warm water dissolves slower. (a) False (b) True
28. 28.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) wet or dry cotton (b) the kind of seeds (c) the number of seeds (d) the same bowls
29. 29.🟡 Which of these keeps turmeric yellow? (a) vinegar (b) baking soda water (c) soap solution (d) detergent water
30. 30.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a battery cell (c) a rubber band (d) a potted plant
31. 31.🥄 Which of these dissolves faster? (a) a big sugar cube (b) powdered sugar (c) sugar in icy water (d) sugar left unstirred
32. 32.True or false: sugar left unstirred dissolves slower. (a) False (b) True
33. 33.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the drop height”? (a) we measure it (b) we keep it the same (c) we change it
34. 34.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) coins as the load (c) a battery cell (d) a small paper cup
35. 35.🛟 What should you wear for a long time in the hot sun? (a) nothing on your head (b) a woollen sweater (c) a cap or hat (d) a raincoat
36. 36.🧺 Which of these is needed for the thread-reel pulley? (a) a balloon (b) a magnet (c) a battery cell (d) string
37. 37.🍯 Is an ice cube denser or less dense than water? (a) denser than water (b) less dense than water
38. 38.🧺 Three of these are needed for the card-on-a-glass trick. Which one is NOT needed? (a) a sink or a bucket (b) a glass of water (c) a towel (d) a battery cell
39. 39.🧺 Three of these are needed for the paper bridge. Which one is NOT needed? (a) coins (b) a magnet (c) two books (d) a ruler
40. 40.🛟 Is this a safe or an unsafe habit in an experiment: putting things in mouth? (a) safe (b) unsafe

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