Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 363 · 40 questions

What you do (Find the experiment, use the idea): 1. Read the question and find its experiment. 2. Use that experiment’s idea — acid and base, indicator colours, chemical change, what seeds and yeast need, transpiration, crystals or filtering. 3. For a fair-test question, find what is changed, kept the same and measured. 4. For a safety question, choose what keeps everyone safe.

1. 1.True or false: detergent water is neutral. (a) False (b) True
2. 2.🔍 Which is the odd one out? (a) melting butter (b) rusting iron (c) browning lemon ink (d) baking a cake
3. 3.🧺 Do we need vinegar for the fizzy balloon? (a) not needed (b) needed
4. 4.🌱 Will these sprout: wet seeds by a window? (a) sprouts (b) does not sprout
5. 5.🔮 The fizzing stops after a while. Why? (a) the bottle got tired (b) the gas froze (c) the balloon got cold (d) an ingredient ran out
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.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) dissolving salt (c) rusting iron (d) baking a cake
8. 8.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
9. 9.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it flowers more (c) it turns blue (d) it grows faster
10. 10.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is what we measure. (a) False (b) True
11. 11.True or false: small pebbles does not dissolve in water. (a) False (b) True
12. 12.🪴 Which part of a plant does this job: carry water upward? (a) roots (b) leaves (c) stem (d) flower
13. 13.True or false: a comb is not needed for the fizzy balloon. (a) False (b) True
14. 14.True or false: a potted plant is needed for the leafy bag test. (a) False (b) True
15. 15.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) size of the balloon (b) the same bottle (c) spoons of baking soda
16. 16.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
17. 17.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) lemon juice (b) white paper (c) a balloon (d) a small bowl
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is kept the same. (a) False (b) True
19. 19.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the same kind of bag is kept the same. (a) False (b) True
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we change it (b) we measure it (c) we keep it the same
21. 21.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it floats on top (b) it turns to sand (c) it dissolves (d) it sinks to the bottom
22. 22.🔍 Which is the odd one out? (a) sugar (b) table salt (c) sand (d) food colour
23. 23.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
24. 24.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
25. 25.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
26. 26.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we keep it the same (b) we measure it (c) we change it
27. 27.True or false: a rubber band is needed for the leafy bag test. (a) False (b) True
28. 28.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a balloon (b) sugar (c) a small bottle (d) a battery cell
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the light we look in (c) the turmeric paper (d) the number of drops
30. 30.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) smaller crystals (c) liquid crystals (d) no crystals
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the amount of vinegar (b) spoons of baking soda (c) size of the balloon (d) the same bottle
32. 32.🍋 Which of these steps is a job for an adult? (a) writing the message (b) cutting the lemon (c) dipping the cotton bud (d) reading the message
33. 33.🛟 The water for the yeast should be ___. (a) very salty (b) ice cold (c) warm, not hot (d) boiling hot
34. 34.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) a comb (d) a magnet
35. 35.True or false: fresh cream is needed for making butter. (a) False (b) True
36. 36.📘 Is the fizzing a sign that a new substance is made? (a) no, nothing changes (b) it is only dissolving (c) yes, a new gas forms (d) it is only melting
37. 37.🪴 Where did the water inside the bag come from? (a) the leaves (b) the rain (c) the rubber band (d) the plastic
38. 38.True or false: sugar water is a base. (a) False (b) True
39. 39.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
40. 40.🍞 Which of these is something yeast does not need? (a) warm water (b) sugar (c) vinegar (d) time

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