Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 368 · 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 — does a cloth filter or a cotton filter give clearer water? Which of these is kept the same? (a) how clear the water is (b) the filter material (c) the same muddy water
2. 2.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) small pebbles (d) food colour
3. 3.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is the one thing we change. (a) True (b) False
4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) no crystals (d) smaller crystals
5. 5.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we keep it the same (b) we change it (c) we measure it
6. 6.True or false: melting ice is a change that cannot be undone. (a) False (b) True
7. 7.🛟 Some seeds from shops are coated with chemicals. What is the safe rule? (a) feed them to pets (b) throw them at friends (c) never put seeds in mouth (d) eat a few to check
8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a mirror (c) water (d) turmeric powder
9. 9.🪴 Which part of a plant does this job: make seeds? (a) flower (b) roots (c) stem (d) leaves
10. 10.True or false: orange juice is neutral. (a) True (b) False
11. 11.🛟 Why must a plastic bag never go over anyone’s head? (a) it is too big (b) it gets wet (c) it can block breathing (d) it changes colour
12. 12.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) yeast (b) a funnel (c) a clean glass (d) muddy water
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
14. 14.🧺 Which of these is not needed for sprouting seeds? (a) a balloon (b) moong seeds (c) a few days (d) cotton wool
15. 15.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a battery cell (c) a funnel (d) sand and pebbles
16. 16.🍋 Secret message: who does this step — ironing the paper? (a) a child can do it (b) an adult does it
17. 17.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is what we measure. (a) False (b) True
18. 18.⚖️ Fair test — do seeds need water to sprout? Which of these is kept the same? (a) the number of seeds (b) wet or dry cotton (c) how many seeds sprout
19. 19.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) sugar water (d) soap solution
20. 20.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
21. 21.🧺 Do we need a battery cell for sprouting seeds? (a) not needed (b) needed
22. 22.🌱 Seeds need water, air and ___ to sprout. (a) soil (b) salt (c) warmth (d) sugar
23. 23.🔮 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
24. 24.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a timer (b) a battery cell (c) cold water to rinse (d) a jar with a tight lid
25. 25.🌱 Is sugar needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
26. 26.🫧 Which gas fills the balloon in the baking soda and vinegar experiment? (a) oxygen (b) carbon dioxide (c) helium (d) hydrogen
27. 27.True or false: sugar water is neutral. (a) False (b) True
28. 28.🔍 Which is the odd one out? (a) plugging in the iron (b) writing the message (c) reading the message (d) dipping the cotton bud
29. 29.True or false: a mirror is needed for the muddy water filter. (a) True (b) False
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a battery cell (b) dry yeast (c) sugar (d) warm water
31. 31.🧺 Do we need a battery cell for the muddy water filter? (a) needed (b) not needed
32. 32.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) the kind of balloon (c) the same bottle (d) size of the balloon
33. 33.⚖️ 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 yeast (c) the water temperature
34. 34.🌱 Where does a sprouting seed get its first food from? (a) food stored in the seed (b) the air (c) the sunlight only (d) the cotton wool
35. 35.True or false: a timer is needed for making butter. (a) True (b) False
36. 36.🪴 Which part of a plant does this job: take in water from soil? (a) flower (b) leaves (c) stem (d) roots
37. 37.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) the cream temperature (b) how hard we shake (c) the same jar (d) time to make butter
38. 38.True or false: yeast is not needed for the muddy water filter. (a) True (b) False
39. 39.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is what we measure. (a) True (b) False
40. 40.True or false: salt is not needed for growing salt crystals. (a) False (b) True

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