Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 47 · 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.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) white paper strips (c) turmeric powder (d) a magnet
2. 2.🧺 Do we need a mirror for the fizzy balloon? (a) needed (b) not needed
3. 3.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a battery cell (c) a funnel or spoon (d) a magnet
4. 4.🍞 Does yeast need a magnet to make gas? (a) yeast does not need it (b) yeast needs it
5. 5.🛟 Who should use the hot iron in the secret message experiment? (a) the youngest child (b) any child (c) whoever is fastest (d) only an adult
6. 6.🌱 Will these sprout: seeds on dry cotton? (a) sprouts (b) does not sprout
7. 7.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
8. 8.🍞 Does yeast need time to make gas? (a) yeast needs it (b) yeast does not need it
9. 9.🌱 Seeds need water, air and ___ to sprout. (a) warmth (b) sugar (c) soil (d) salt
10. 10.🧂 Which of these dissolves in water? (a) baking soda (b) sawdust (c) sand (d) small pebbles
11. 11.🍞 Does yeast need sunlight to make gas? (a) yeast does not need it (b) yeast needs it
12. 12.True or false: cotton wool is needed for sprouting seeds. (a) True (b) False
13. 13.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) time to make butter (b) the same jar (c) how hard we shake (d) the cream temperature
14. 14.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
15. 15.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) browning lemon ink (c) melting ice (d) folding paper
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) a balloon (d) salt
17. 17.🧺 Which of these is needed for the fizzy balloon? (a) sugar (b) a comb (c) a magnet (d) an empty bottle
18. 18.🧺 Do we need a battery cell for sprouting seeds? (a) not needed (b) needed
19. 19.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) turmeric powder (b) a small bottle (c) dry yeast (d) sugar
20. 20.⚖️ 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
21. 21.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is what we measure? (a) the amount of yeast (b) the amount of sugar (c) size of the balloon (d) the water temperature
22. 22.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the same glass (b) the amount poured (c) the filter material (d) the same muddy water
23. 23.🛟 Why must the jar lid be screwed on tightly? (a) so it gets hot (b) so air gets out (c) so it turns yellow (d) so cream does not spill
24. 24.🍋 Which of these steps is a job a child can do? (a) putting the iron away (b) plugging in the iron (c) reading the message (d) ironing the paper
25. 25.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) a rubber band (b) sunlight (c) a magnet (d) a potted plant
26. 26.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a balloon (c) a battery cell (d) soap solution
27. 27.🌱 Which of these sprouts in a few days? (a) seeds in the freezer (b) seeds on dry cotton (c) boiled seeds (d) seeds on wet cotton
28. 28.🍞 Which of these is something yeast does not need? (a) time (b) salt (c) sugar (d) warm water
29. 29.⚖️ 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 keep it the same (b) we measure it (c) we change it
30. 30.True or false: melting butter is a change that can be undone. (a) False (b) True
31. 31.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we change it (b) we measure it (c) we keep it the same
32. 32.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a clean glass (b) a funnel (c) muddy water (d) a battery cell
33. 33.🪴 Which part of a plant does this job: make seeds? (a) stem (b) leaves (c) flower (d) roots
34. 34.🍋 Secret message: who does this step — putting the iron away? (a) an adult does it (b) a child can do it
35. 35.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) next to the baby (c) safe from small children (d) on the edge of a table
36. 36.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
37. 37.True or false: a magnet is something yeast needs. (a) True (b) False
38. 38.🧺 Do we need a battery cell for the leafy bag test? (a) needed (b) not needed
39. 39.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) cooking oil (d) baking soda
40. 40.True or false: chaff from wheat grain is done by winnowing. (a) True (b) False

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