Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 239 · 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 — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
2. 2.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) size of the balloon (b) the same bottle (c) spoons of baking soda (d) the kind of balloon
3. 3.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we measure it (b) we keep it the same (c) we change it
4. 4.True or false: melting butter is a change that can be undone. (a) True (b) False
5. 5.True or false: detergent water is a base. (a) False (b) True
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the kind of salt (b) days to see crystals (c) sunny or shady place
7. 7.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) sugar water (c) soap solution (d) detergent water
8. 8.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) water (c) yeast (d) a mirror
9. 9.🔮 Predict: you shake skimmed milk (with almost no cream) instead. What happens? (a) more butter forms (b) no butter forms (c) it turns to cheese (d) it turns blue
10. 10.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
11. 11.🍋 What colour does the lemon writing turn when an adult warms it? (a) white (b) green (c) blue (d) brown
12. 12.True or false: dry yeast is needed for the yeast balloon. (a) False (b) True
13. 13.True or false: make seeds is a job of the flower. (a) False (b) True
14. 14.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we change it (c) we keep it the same
16. 16.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) it shrinks (b) it grows bigger (c) it turns blue (d) there is no change
17. 17.⚖️ Fair test — does cold cream turn into butter faster than warm cream? What do we do with “the cream temperature”? (a) we change it (b) we keep it the same (c) we measure it
18. 18.True or false: a balloon is not needed for sprouting seeds. (a) True (b) False
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same glass (b) the same muddy water (c) the amount poured (d) how clear the water is
20. 20.🧺 Do we need a funnel or spoon for the fizzy balloon? (a) not needed (b) needed
21. 21.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? True or false: amount of water drops is the one thing we change. (a) True (b) False
22. 22.🧺 Do we need a small bottle for the yeast balloon? (a) needed (b) not needed
23. 23.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) sugar (c) a magnet (d) an empty bottle
24. 24.📘 What do we call plants giving out water vapour from their leaves? (a) reflection (b) transpiration (c) germination (d) digestion
25. 25.🫧 Which of these is a base? (a) vinegar (b) sugar water (c) detergent water (d) salt water
26. 26.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
28. 28.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the water temperature”? (a) we change it (b) we measure it (c) we keep it the same
29. 29.🛟 What should you do after touching soil or seeds? (a) lick your fingers (b) wash your hands (c) skip washing (d) rub your eyes
30. 30.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) a small bottle (b) a magnet (c) sugar (d) dry yeast
31. 31.True or false: sand dissolves in water. (a) True (b) False
32. 32.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a comb (b) baking soda (c) vinegar (d) a tray for spills
33. 33.🔮 Predict: a plant gets no water for many days in summer. What happens? (a) it wilts and droops (b) it flowers more (c) it grows faster (d) it turns blue
34. 34.🍞 Does yeast need sunlight to make gas? (a) yeast needs it (b) yeast does not need it
35. 35.🪴 Which of these is a job of the leaves? (a) take in water from soil (b) hold the plant in soil (c) make seeds (d) give out water vapour
36. 36.🔍 Which is the odd one out? (a) melting butter (b) dissolving salt (c) cooking an egg (d) freezing water
37. 37.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
38. 38.🫧 Is lemon juice an acid, a base or neutral? (a) a base (b) an acid (c) neutral
39. 39.🌱 Is sugar needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
40. 40.True or false: ironing the paper is a job for an adult. (a) True (b) False

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