Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 373 · 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.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) it turns to cheese (c) it turns blue (d) no butter forms
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is what we measure. (a) True (b) False
3. 3.🔍 Which is the odd one out? (a) writing the message (b) dipping the cotton bud (c) cutting the lemon (d) reading the message
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is kept the same. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) water (b) sunlight (c) salt (d) soil
6. 6.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) dry yeast (b) turmeric powder (c) warm water (d) sugar
7. 7.⚖️ 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) the same cotton bud (d) the kind of juice
8. 8.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it bursts at once (d) it grows very little
9. 9.True or false: a battery cell is needed for the secret lemon message. (a) False (b) True
10. 10.True or false: wet seeds by a window does not sprout. (a) True (b) False
11. 11.🔮 Predict: the adult irons for only one second. What happens? (a) it gets darker (b) writing turns green (c) the paper floats (d) writing stays faint
12. 12.🧺 Which of these is not needed for the fizzy balloon? (a) a balloon (b) vinegar (c) a funnel or spoon (d) a magnet
13. 13.True or false: an empty bottle is not needed for the fizzy balloon. (a) False (b) True
14. 14.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) cotton wool (b) a balloon (c) moong seeds (d) a small bowl
15. 15.True or false: melting ice is a change that cannot be undone. (a) True (b) False
16. 16.🧺 Which of these is needed for the secret lemon message? (a) yeast (b) lemon juice (c) a magnet (d) a mirror
17. 17.🧺 Which of these is not needed for the turmeric test? (a) water (b) lemon juice (c) a comb (d) turmeric powder
18. 18.🛟 The water for the yeast should be ___. (a) warm, not hot (b) very salty (c) boiling hot (d) ice cold
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the kind of juice (b) how dark the writing is (c) the same cotton bud (d) the iron setting
20. 20.🧺 Do we need sunlight for the leafy bag test? (a) needed (b) not needed
21. 21.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we measure it (b) we change it (c) we keep it the same
22. 22.True or false: rusting iron is a change that can be undone. (a) False (b) True
23. 23.🍋 Which of these steps is a job a child can do? (a) writing the message (b) plugging in the iron (c) cutting the lemon (d) ironing the paper
24. 24.🧺 Do we need a few hours for the leafy bag test? (a) not needed (b) needed
25. 25.🛟 What should you do if vinegar splashes in your eye? (a) ignore it (b) rub it hard (c) rinse with clean water (d) add baking soda
26. 26.🧺 Do we need a balloon for making butter? (a) needed (b) not needed
27. 27.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
28. 28.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a clear plastic bag (b) a few hours (c) a magnet (d) a potted plant
30. 30.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same cotton bud”? (a) we change it (b) we measure it (c) we keep it the same
31. 31.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) nobody needs to (c) a friend who is running (d) a grown-up
32. 32.True or false: melting butter is a change that can be undone. (a) False (b) True
33. 33.🛟 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
34. 34.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) melting ice (d) milk turning to curd
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) warm water (d) yeast
36. 36.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) baking soda water (c) tamarind water (d) vinegar
37. 37.🛟 After the yeast experiment, what should you do with the mixture? (a) put it in your mouth (b) throw it at a wall (c) keep it for a month (d) pour it down the sink
38. 38.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same place”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.🌱 Is warmth needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
40. 40.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) sand and pebbles (c) cotton or cloth (d) yeast

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