Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 271 · 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: melting butter? (a) cannot be undone (b) can be undone
2. 2.🪴 Through which part does a plant take in water from the soil? (a) the leaves (b) the roots (c) the flowers (d) the fruits
3. 3.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds in the freezer (c) boiled seeds (d) seeds on wet cotton
4. 4.🍋 Which of these steps is a job a child can do? (a) plugging in the iron (b) writing the message (c) putting the iron away (d) cutting the lemon
5. 5.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a magnet (c) turmeric powder (d) a rubber band
6. 6.⚖️ Fair test — do seeds need water to sprout? True or false: the same bowls is kept the same. (a) False (b) True
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) the youngest child (d) a grown-up
8. 8.🧺 Do we need a magnet for the secret lemon message? (a) not needed (b) needed
9. 9.🫧 Which of these is an acid? (a) lemon juice (b) soap solution (c) detergent water (d) baking soda water
10. 10.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
11. 11.🧺 Do we need a small bowl for the secret lemon message? (a) not needed (b) needed
12. 12.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is what we measure. (a) False (b) True
13. 13.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
14. 14.⚖️ 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 keep it the same (c) we measure it
15. 15.True or false: salt is needed for a seed to sprout. (a) True (b) False
16. 16.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) cooking an egg (c) melting butter (d) folding paper
17. 17.🧺 Which of these is needed for the leafy bag test? (a) a magnet (b) a battery cell (c) a clear plastic bag (d) vinegar
18. 18.🧺 Which of these is needed for sprouting seeds? (a) a balloon (b) turmeric powder (c) a mirror (d) cotton wool
19. 19.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it can block breathing (d) it gets wet
20. 20.🧺 Which of these is needed for the yeast balloon? (a) a battery cell (b) a comb (c) a magnet (d) a small bottle
21. 21.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is what we measure. (a) True (b) False
22. 22.True or false: yeast is needed for growing salt crystals. (a) False (b) True
23. 23.🔍 Which is the odd one out? (a) letting the paper dry (b) reading the message (c) writing the message (d) putting the iron away
24. 24.🍞 Does yeast need salt to make gas? (a) yeast does not need it (b) yeast needs it
25. 25.True or false: a comb is not needed for the yeast balloon. (a) True (b) False
26. 26.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a funnel (c) a balloon (d) cotton or cloth
27. 27.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “how hard we shake”? (a) we measure it (b) we change it (c) we keep it the same
28. 28.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “the kind of balloon”? (a) we measure it (b) we change it (c) we keep it the same
29. 29.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
30. 30.True or false: give out water vapour is a job of the leaves. (a) False (b) True
31. 31.🧺 Which of these is needed for the fizzy balloon? (a) a battery cell (b) sugar (c) vinegar (d) a magnet
32. 32.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a few hours (b) sunlight (c) a potted plant (d) a battery cell
33. 33.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the water temperature (b) the same bottles (c) the amount of sugar (d) size of the balloon
34. 34.True or false: curd is a base. (a) False (b) True
35. 35.🧺 Do we need turmeric powder for sprouting seeds? (a) needed (b) not needed
36. 36.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
37. 37.🧈 Which of these is a change that can be undone? (a) melting ice (b) baking a cake (c) rusting iron (d) cooking an egg
38. 38.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) yeast (b) a small bowl (c) an adult with an iron (d) white paper
39. 39.🧺 Which of these is not needed for the yeast balloon? (a) dry yeast (b) a mirror (c) a balloon (d) a small bottle
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) warm water (d) a piece of string

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