Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 138 · 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 salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
2. 2.🫗 How do we separate gravel from fine sand? (a) evaporating (b) sieving (c) filtering (d) handpicking
3. 3.🧺 Do we need a funnel for the muddy water filter? (a) not needed (b) needed
4. 4.🧺 Which of these is not needed for the muddy water filter? (a) a magnet (b) a funnel (c) cotton or cloth (d) a clean glass
5. 5.🪴 Which of these is a job of the flower? (a) give out water vapour (b) make seeds (c) carry water upward (d) make food in sunlight
6. 6.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) yeast (d) white paper strips
7. 7.🧺 Which of these is needed for sprouting seeds? (a) turmeric powder (b) moong seeds (c) yeast (d) a magnet
8. 8.🔍 Which is the odd one out? (a) cutting the lemon (b) plugging in the iron (c) letting the paper dry (d) putting the iron away
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the number of drops (c) the liquid we test
10. 10.True or false: make seeds is a job of the leaves. (a) False (b) True
11. 11.🧺 Three of these are needed for the secret lemon message. Which one is NOT needed? (a) white paper (b) a cotton bud (c) lemon juice (d) yeast
12. 12.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a balloon (b) sand and pebbles (c) a clean glass (d) muddy water
13. 13.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we measure it (b) we change it (c) we keep it the same
14. 14.🛟 Why must a plastic bag never go over anyone’s head? (a) it gets wet (b) it changes colour (c) it can block breathing (d) it is too big
15. 15.🧺 Which of these is not needed for the yeast balloon? (a) a small bottle (b) a battery cell (c) a balloon (d) dry yeast
16. 16.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
17. 17.🧺 Which of these is not needed for sprouting seeds? (a) cotton wool (b) a small bowl (c) moong seeds (d) turmeric powder
18. 18.🧂 Which of these dissolves in water? (a) chalk powder (b) food colour (c) small pebbles (d) cooking oil
19. 19.True or false: reading the message is a job a child can do. (a) False (b) True
20. 20.🧺 Which of these is not needed for the yeast balloon? (a) a balloon (b) dry yeast (c) a paper clip (d) sugar
21. 21.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the filter material (b) the amount poured (c) how clear the water is (d) the same glass
22. 22.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) soap solution (c) lemon juice (d) sugar water
23. 23.🌱 Which of these does not sprout? (a) seeds in the freezer (b) wet seeds by a window (c) wet seeds in the dark (d) seeds on wet cotton
24. 24.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
25. 25.True or false: freezing water is a change that can be undone. (a) True (b) False
26. 26.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we measure it (b) we change it (c) we keep it the same
27. 27.🌱 Which of these is needed for a seed to sprout? (a) salt (b) sunlight (c) water (d) soil
28. 28.True or false: white paper strips is not needed for the turmeric test. (a) True (b) False
29. 29.True or false: a mirror is needed for the turmeric test. (a) True (b) False
30. 30.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) False (b) True
31. 31.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
32. 32.🎈 What blows up the balloon in the yeast experiment? (a) smoke (b) air from outside (c) steam (d) carbon dioxide gas
33. 33.🧺 Do we need turmeric powder for the secret lemon message? (a) not needed (b) needed
34. 34.🍋 Which of these steps is a job a child can do? (a) cutting the lemon (b) putting the iron away (c) ironing the paper (d) reading the message
35. 35.⚖️ 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
36. 36.True or false: a battery cell is needed for sprouting seeds. (a) False (b) True
37. 37.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) a funnel (c) a mirror (d) a balloon
38. 38.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
39. 39.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) True (b) False
40. 40.📘 Vinegar is an acid and baking soda is a base. What happens when they meet? (a) they become magnets (b) they float apart (c) they freeze (d) they react

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