Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 797 · 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 plant in the sun give out more water than one in the shade? True or false: the size of the plant is the one thing we change. (a) False (b) True
2. 2.🍞 Which of these is something yeast does not need? (a) warm water (b) time (c) sunlight (d) sugar
3. 3.True or false: gravel from fine sand is done by winnowing. (a) False (b) True
4. 4.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is kept the same? (a) the same kind of bag (b) sun or shade (c) amount of water drops
5. 5.True or false: sunlight is needed for a seed to sprout. (a) False (b) True
6. 6.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) moong seeds (c) cotton wool (d) a battery cell
7. 7.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) wet seeds by a window (c) seeds in the freezer (d) boiled seeds
8. 8.True or false: lemon juice is a base. (a) True (b) False
9. 9.True or false: salt water keeps turmeric yellow. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) warm water (b) time (c) sugar (d) a magnet
11. 11.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
12. 12.True or false: a clean glass is not needed for the muddy water filter. (a) False (b) True
13. 13.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) a battery cell (b) fresh cream (c) cold water to rinse (d) a timer
14. 14.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) bright blue (d) white at once
15. 15.🍞 Does yeast need salt to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the size of the plant”? (a) we change it (b) we keep it the same (c) we measure it
17. 17.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) sugar (b) a balloon (c) a paper clip (d) warm water
18. 18.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is kept the same? (a) spoons of baking soda (b) size of the balloon (c) the same bottle
19. 19.🔮 Predict: you pour muddy water through two layers of cloth instead of one. The water comes out ___. (a) salty (b) hot (c) muddier (d) clearer
20. 20.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) the iron setting (b) the kind of juice (c) how dark the writing is
21. 21.🔍 Which is the odd one out? (a) soap solution (b) detergent water (c) salt water (d) baking soda water
22. 22.True or false: gravel from fine sand is done by filtering. (a) True (b) False
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
24. 24.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? True or false: the kind of juice is kept the same. (a) True (b) False
25. 25.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
26. 26.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) vinegar
27. 27.🧺 Do we need a rubber band for the leafy bag test? (a) needed (b) not needed
28. 28.True or false: turmeric powder is needed for the leafy bag test. (a) False (b) True
29. 29.🧈 Which of these is a change that can be undone? (a) baking a cake (b) milk turning to curd (c) browning lemon ink (d) melting butter
30. 30.True or false: rusting iron is a change that can be undone. (a) True (b) False
31. 31.🛟 Lemon juice stings cuts and eyes. What should you do after the experiment? (a) lick your fingers (b) skip washing (c) wash your hands (d) rub your eyes
32. 32.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? What do we do with “the amount poured”? (a) we measure it (b) we keep it the same (c) we change it
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) False (b) True
34. 34.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
35. 35.🧺 Which of these is needed for the leafy bag test? (a) a clear plastic bag (b) vinegar (c) yeast (d) a mirror
36. 36.🧺 Which of these is not needed for the muddy water filter? (a) cotton or cloth (b) sand and pebbles (c) a magnet (d) a clean glass
37. 37.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it flowers more (b) it grows faster (c) it wilts and droops (d) it turns blue
38. 38.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold kills sugar (c) cold slows yeast down (d) cold makes it pink
39. 39.⚖️ Fair test — do seeds need water to sprout? True or false: the number of seeds is what we measure. (a) False (b) True
40. 40.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is the one thing we change? (a) the filter material (b) the same glass (c) the same funnel (d) how clear the water is

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