Science Experiments Final Test Worksheet

Science experiments lesson 30: Final test: science experiments and STEM · Set 63 · 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 wet flat sheet (b) a U-shaped channel (c) rolled paper tubes (d) paper with folded edges
2. 2.🛟 Why must the jar lid be screwed on tightly? (a) so air gets out (b) so it gets hot (c) so cream does not spill (d) so it turns yellow
3. 3.🛟 Coins have been touched by many hands. After the experiment you should ___. (a) lick your fingers (b) wash your hands (c) skip washing (d) rub your eyes
4. 4.🔍 Which is the odd one out? (a) a brick (b) a pebble (c) puffed rice (d) a heavy book
5. 5.🍋 Which of these steps is a job for an adult? (a) reading the message (b) writing the message (c) letting the paper dry (d) putting the iron away
6. 6.⚖️ Fair test — does colour reach the petals faster with a short stem or a long stem? True or false: time for colour to show is what we measure. (a) False (b) True
7. 7.🍯 Is a cork denser or less dense than water? (a) denser than water (b) less dense than water
8. 8.🔮 Predict: you add two more paper clips. How does it fall? (a) it stops in the air (b) faster (c) it floats up (d) slower
9. 9.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) sawdust (d) food colour
10. 10.🟡 Turmeric paper meets plain water. What happens? (a) turns reddish-brown (b) stays yellow
11. 11.🎈 Why does the balloon blow up? (a) outside air gets in (b) gas is made inside (c) vinegar is hot (d) the bottle shrinks
12. 12.🧺 Three of these are needed for the ruler lever. Which one is NOT needed? (a) a flat table (b) turmeric powder (c) a round pencil (d) a 30 cm ruler
13. 13.💧 Why do water drops form on the outside of a glass of ice water? (a) the glass leaks (b) ice escapes the glass (c) the glass sweats (d) vapour in air cools
14. 14.⚖️ Fair test — which kind of ball bounces highest? What do we do with “the person dropping”? (a) we keep it the same (b) we change it (c) we measure it
15. 15.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
16. 16.🛟 Why should you not over-blow the balloon? (a) it gets too heavy (b) it turns into a kite (c) it changes colour (d) it can pop loudly
17. 17.⚖️ Fair test — which paper shape holds the most coins? Which of these is the one thing we change? (a) where coins are placed (b) the shape of the paper (c) the kind of coins (d) coins it holds
18. 18.🫗 Is filtered pond water safe to drink? (a) no, germs may stay (b) yes, always (c) yes, if it is clear (d) yes, if it is cold
19. 19.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a balloon (c) lemon juice (d) a battery cell
20. 20.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) a magnet (c) a cotton bud (d) yeast
21. 21.🧺 Do we need a battery cell for the water rainbow? (a) not needed (b) needed
22. 22.True or false: sweat drying on skin is evaporation. (a) False (b) True
23. 23.🔮 A heavier child sits on the same park swing. What happens to the swing time? (a) much faster (b) much slower (c) it cannot swing (d) about the same
24. 24.True or false: baking a cake is a change that can be undone. (a) True (b) False
25. 25.🧺 Which of these is needed for the water cycle bowl? (a) a magnet (b) a balloon (c) yeast (d) ice cubes
26. 26.🧺 Which of these is not needed for the muddy water filter? (a) muddy water (b) sand and pebbles (c) a funnel (d) turmeric powder
27. 27.True or false: baking soda does not dissolve in water. (a) False (b) True
28. 28.🧺 Which of these is not needed for the paper bridge? (a) two books (b) a ruler (c) coins (d) yeast
29. 29.⚡ Which of these does not move to a charged comb? (a) a thin water stream (b) puffed rice (c) tiny paper bits (d) a brick
30. 30.🥄 Why does sugar dissolve faster in warm water? (a) cold water is wet (b) particles move faster (c) sugar likes the dark (d) warm water is thicker
31. 31.⚖️ Fair test — do the layers end up in the same order if we pour the liquids in a different order? Which of these is the one thing we change? (a) how much of each liquid (b) the same glass (c) the order of the layers (d) the order of pouring
32. 32.True or false: a magnet is not needed for the water rainbow. (a) False (b) True
33. 33.True or false: a well pulley is a lever. (a) True (b) False
34. 34.⚖️ Fair test — does moving the coins farther from the pencil make that side go down more? Which of these is kept the same? (a) the number of coins (b) distance from the pencil (c) which side goes down
35. 35.🔮 Predict: you gently drop a small cork into the tower. Where does it stop? (a) in the water layer (b) on top of the oil (c) in the honey layer (d) under the honey
36. 36.True or false: boiled seeds does not sprout. (a) True (b) False
37. 37.⚡ Why does the rubbed comb pull the paper bits? (a) it is a magnet (b) it is sticky (c) it has static charge (d) it is hot
38. 38.⚖️ Fair test — does the shape of a lump of clay change whether it floats? True or false: whether it floats is the one thing we change. (a) True (b) False
39. 39.True or false: vinegar is needed for the static comb. (a) True (b) False
40. 40.🧺 Which of these is not needed for the secret lemon message? (a) an adult with an iron (b) yeast (c) lemon juice (d) a cotton bud

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