Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 398 · 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.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) a battery cell (d) soap solution
3. 3.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
4. 4.🧺 Which of these is not needed for the muddy water filter? (a) a magnet (b) sand and pebbles (c) muddy water (d) a funnel
5. 5.True or false: soil is needed for a seed to sprout. (a) False (b) True
6. 6.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
7. 7.🌱 Is air needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
8. 8.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a prism (c) a pulley (d) a magnet
9. 9.🪴 Which part of a plant does this job: take in water from soil? (a) leaves (b) flower (c) stem (d) roots
10. 10.🌱 Which of these sprouts in a few days? (a) seeds on wet cotton (b) seeds in the freezer (c) boiled seeds (d) seeds on dry cotton
11. 11.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it can block breathing (c) it is too big (d) it gets wet
12. 12.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) a small bowl (b) white paper (c) a magnet (d) a cotton bud
13. 13.True or false: sugar is needed for the fizzy balloon. (a) False (b) True
14. 14.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) soap solution (d) plain water
15. 15.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
16. 16.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) a magnet (c) a balloon (d) a small bowl
17. 17.🍞 Does yeast need vinegar to make gas? (a) yeast needs it (b) yeast does not need it
18. 18.True or false: a timer is needed for making butter. (a) False (b) True
19. 19.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) clear water is sweet (c) germs are invisible (d) clear water is hot
20. 20.🧂 Which of these dissolves in water? (a) sawdust (b) chalk powder (c) table salt (d) cooking oil
21. 21.🛟 After the yeast experiment, what should you do with the mixture? (a) throw it at a wall (b) put it in your mouth (c) pour it down the sink (d) keep it for a month
22. 22.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) wash your hands (b) lick your fingers (c) rub your eyes (d) skip washing
23. 23.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is kept the same. (a) False (b) True
24. 24.🌱 Which of these sprouts in a few days? (a) wet seeds in the dark (b) seeds on dry cotton (c) boiled seeds (d) seeds in the freezer
25. 25.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) the balloon is smaller (b) it shrinks to nothing (c) it turns to bread (d) the balloon is bigger
26. 26.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
27. 27.🧺 Which of these is needed for the muddy water filter? (a) muddy water (b) a magnet (c) a mirror (d) yeast
28. 28.🛟 What should you do after touching soil or seeds? (a) rub your eyes (b) skip washing (c) lick your fingers (d) wash your hands
29. 29.🔍 Which is the odd one out? (a) writing the message (b) reading the message (c) dipping the cotton bud (d) ironing the paper
30. 30.🛟 Why is a plastic jar a good choice for shaking? (a) it will not break (b) it is heavier (c) it is magnetic (d) it is hotter
31. 31.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: the kind of plant is kept the same. (a) True (b) False
32. 32.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the ironing time”? (a) we keep it the same (b) we measure it (c) we change it
33. 33.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
34. 34.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a mirror (b) sugar (c) dry yeast (d) a small bottle
35. 35.🧺 Which of these is needed for the yeast balloon? (a) a comb (b) a battery cell (c) sugar (d) turmeric powder
36. 36.🔮 Predict: you tie a bag on a branch with no leaves. Will it collect much water? (a) much more water (b) exactly the same (c) it fills with soil (d) much less water
37. 37.⚖️ 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 the one thing we change. (a) False (b) True
38. 38.🔮 Predict: you use plain water instead of vinegar. What happens? (a) a huge eruption (b) the balloon bursts (c) very little fizzing (d) it turns to honey
39. 39.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) turmeric powder (c) a magnet (d) dry yeast
40. 40.🫗 Which of these is done by sieving? (a) husk from rice grain (b) gravel from fine sand (c) mud from water (d) small stones from dal

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