Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 638 · 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.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
2. 2.🌱 Seeds need water, air and ___ to sprout. (a) salt (b) soil (c) warmth (d) sugar
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
4. 4.🧺 Do we need sugar for the yeast balloon? (a) not needed (b) needed
5. 5.🪴 Which of these is a job of the roots? (a) hold the plant in soil (b) make seeds (c) hold up the leaves (d) give out water vapour
6. 6.🪴 Which part of a plant does this job: give out water vapour? (a) flower (b) leaves (c) roots (d) stem
7. 7.🛟 How should the plastic bag be tied around the branch? (a) gently, not too tight (b) with sharp wire (c) with a hot glue gun (d) as tight as possible
8. 8.🧺 Do we need a few days for sprouting seeds? (a) not needed (b) needed
9. 9.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
10. 10.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “time to make butter”? (a) we measure it (b) we keep it the same (c) we change it
11. 11.🔍 Which is the odd one out? (a) melting butter (b) melting ice (c) freezing water (d) cooking an egg
12. 12.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) size of the balloon (b) the amount of water (c) the water temperature
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is the one thing we change. (a) True (b) False
14. 14.🛟 Why should you never drink water just because it looks clear? (a) clear water is salty (b) germs are invisible (c) clear water is hot (d) clear water is sweet
15. 15.🍋 Why can’t you see the lemon writing once it dries? (a) the paper ate it (b) the ink is magnetic (c) dry juice is see-through (d) it turned into air
16. 16.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a potted plant (b) a few hours (c) sunlight (d) vinegar
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) lemon juice (c) a dropper or spoon (d) a mirror
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “size of the balloon”? (a) we change it (b) we keep it the same (c) we measure it
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is kept the same. (a) True (b) False
21. 21.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
22. 22.🪴 Which part of a plant does this job: hold up the leaves? (a) flower (b) roots (c) leaves (d) stem
23. 23.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the amount of sugar (b) size of the balloon (c) the water temperature
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we measure it (b) we keep it the same (c) we change it
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) vinegar (c) plain water (d) soap solution
26. 26.True or false: a mirror is needed for the fizzy balloon. (a) False (b) True
27. 27.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap is an acid (d) soap water is a base
28. 28.🔍 Which is the odd one out? (a) putting the iron away (b) ironing the paper (c) reading the message (d) cutting the lemon
29. 29.True or false: sugar from sugar water is done by filtering. (a) True (b) False
30. 30.🧺 Which of these is not needed for making butter? (a) a bowl (b) a jar with a tight lid (c) a timer (d) a battery cell
31. 31.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the mud (c) the salt (d) the water
32. 32.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) cooking an egg (d) folding paper
33. 33.True or false: bran from wheat flour is done by sieving. (a) True (b) False
34. 34.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is kept the same? (a) the water temperature (b) size of the balloon (c) the amount of yeast
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is what we measure. (a) False (b) True
36. 36.🌱 Will these sprout: seeds on wet cotton? (a) does not sprout (b) sprouts
37. 37.True or false: a cotton bud is not needed for the secret lemon message. (a) True (b) False
38. 38.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a mirror (c) a magnet (d) salt
39. 39.🛟 Why must children keep their fingers away from the iron? (a) it can burn skin (b) it is sticky (c) it is cold (d) it is magnetic
40. 40.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a mirror (b) a funnel (c) muddy water (d) cotton or cloth

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