Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 22 · 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.True or false: a comb is not needed for the turmeric test. (a) False (b) True
2. 2.⚖️ 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
3. 3.True or false: salt is needed for a seed to sprout. (a) True (b) False
4. 4.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) how hard we shake (b) the cream temperature (c) the same jar (d) time to make butter
5. 5.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) days to see crystals (b) the amount of water (c) sunny or shady place (d) the same dish
6. 6.True or false: a jar with a tight lid is needed for making butter. (a) False (b) True
7. 7.True or false: water is needed for a seed to sprout. (a) False (b) True
8. 8.True or false: husk from rice grain is done by evaporating. (a) True (b) False
9. 9.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) soap solution (d) a battery cell
10. 10.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
11. 11.True or false: melting ice is a change that can be undone. (a) True (b) False
12. 12.🪴 Where did the water inside the bag come from? (a) the rain (b) the rubber band (c) the leaves (d) the plastic
13. 13.🧺 Which of these is needed for the turmeric test? (a) yeast (b) lemon juice (c) a comb (d) a balloon
14. 14.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
15. 15.🍞 Does yeast need a magnet to make gas? (a) yeast needs it (b) yeast does not need it
16. 16.🫗 Is filtered pond water safe to drink? (a) yes, if it is clear (b) yes, if it is cold (c) yes, always (d) no, germs may stay
17. 17.True or false: writing the message is a job for an adult. (a) False (b) True
18. 18.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the cream temperature is kept the same. (a) False (b) True
19. 19.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is the one thing we change? (a) the kind of juice (b) the iron setting (c) the same cotton bud (d) how dark the writing is
20. 20.⚖️ 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
21. 21.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
22. 22.🛟 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
23. 23.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
24. 24.True or false: a clean glass is needed for the muddy water filter. (a) False (b) True
25. 25.🔮 Predict (do not try it): yeast is put in boiling water. What happens? (a) it grows faster (b) it turns to sugar (c) the yeast is killed (d) it glows
26. 26.True or false: folding paper is a change that can be undone. (a) False (b) True
27. 27.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it grows very little (c) it grows much faster (d) it turns yellow
28. 28.True or false: a mirror is needed for the yeast balloon. (a) True (b) False
29. 29.True or false: a mirror is needed for the muddy water filter. (a) True (b) False
30. 30.🔍 Which is the odd one out? (a) baking a cake (b) browning lemon ink (c) dissolving salt (d) rusting iron
31. 31.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the amount of cream is what we measure. (a) True (b) False
32. 32.⚖️ 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) False (b) True
33. 33.True or false: a few hours is not needed for the leafy bag test. (a) False (b) True
34. 34.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) blue (b) pale yellow (c) dark green (d) bright red
35. 35.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) salt crystals (b) tiny water drops (c) tiny insects (d) nothing at all
36. 36.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) muddy water (c) a magnet (d) a clean glass
37. 37.True or false: detergent water is an acid. (a) True (b) False
38. 38.True or false: cutting the lemon is a job for an adult. (a) True (b) False
39. 39.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) a friend who is running (d) the youngest child
40. 40.True or false: a mirror is needed for the secret lemon message. (a) False (b) True

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids