Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 760 · 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.⚖️ Fair test — do seeds need water to sprout? True or false: how many seeds sprout is what we measure. (a) False (b) True
2. 2.True or false: a small bottle is needed for the yeast balloon. (a) True (b) False
3. 3.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) vinegar (c) baking soda water (d) soap solution
4. 4.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
5. 5.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) ironing the paper (c) dipping the cotton bud (d) cutting the lemon
6. 6.📘 The browning of lemon juice with heat is a ___ change. (a) physical (b) magnetic (c) chemical (d) musical
7. 7.True or false: carry water upward is a job of the roots. (a) True (b) False
8. 8.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) nothing is needed (c) wipe hands on face (d) lick your fingers
9. 9.🧺 Do we need a comb for the yeast balloon? (a) not needed (b) needed
10. 10.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it can block breathing (c) it is too big (d) it changes colour
11. 11.🔍 Which is the odd one out? (a) rusting iron (b) freezing water (c) melting ice (d) melting butter
12. 12.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) a battery cell (c) an empty bottle (d) a funnel or spoon
13. 13.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) pale yellow (b) bright red (c) blue (d) dark green
14. 14.🫗 How do we separate tea leaves from tea? (a) handpicking (b) winnowing (c) sieving (d) filtering
15. 15.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
16. 16.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: spoons of baking soda is the one thing we change. (a) True (b) False
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
19. 19.🧺 Which of these is needed for sprouting seeds? (a) a magnet (b) a balloon (c) a few days (d) turmeric powder
20. 20.True or false: a magnet is not needed for the fizzy balloon. (a) True (b) False
21. 21.🧺 Which of these is needed for the yeast balloon? (a) turmeric powder (b) a mirror (c) a balloon (d) a comb
22. 22.🌱 Is salt needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
23. 23.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) boiled seeds (c) wet seeds in the dark (d) seeds in the freezer
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the iron setting (b) the ironing time (c) how dark the writing is (d) the kind of juice
25. 25.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) shake it near your face (c) put it in your mouth (d) keep it away from eyes
26. 26.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: size of the balloon is what we measure. (a) False (b) True
27. 27.True or false: yeast is needed for growing salt crystals. (a) True (b) False
28. 28.True or false: yeast is not needed for sprouting seeds. (a) True (b) False
29. 29.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sugar (d) cooking oil
30. 30.True or false: mud from water is done by filtering. (a) False (b) True
31. 31.🛟 After the yeast experiment, what should you do with the mixture? (a) keep it for a month (b) put it in your mouth (c) throw it at a wall (d) pour it down the sink
32. 32.🧺 Do we need yeast for the secret lemon message? (a) needed (b) not needed
33. 33.🔍 Which is the odd one out? (a) sugar water (b) plain water (c) tamarind water (d) detergent water
34. 34.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is the one thing we change? (a) the same jar (b) time to make butter (c) how hard we shake (d) the cream temperature
35. 35.🧈 What is the watery liquid left after the butter forms? (a) honey (b) vinegar (c) oil (d) buttermilk
36. 36.🧺 Do we need a mirror for the leafy bag test? (a) not needed (b) needed
37. 37.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
38. 38.True or false: reading the message is a job for an adult. (a) False (b) True
39. 39.🧺 Do we need a potted plant for the leafy bag test? (a) needed (b) not needed
40. 40.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “size of the balloon”? (a) we keep it the same (b) we change it (c) we measure it

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