Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 499 · 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 cold cream turn into butter faster than warm cream? Which of these is kept the same? (a) time to make butter (b) the cream temperature (c) the amount of cream
2. 2.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.⚖️ 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) amount of water drops (b) the size of the plant (c) sun or shade
4. 4.True or false: a balloon is not needed for the secret lemon message. (a) False (b) True
5. 5.⚖️ Fair test — do seeds need water to sprout? True or false: wet or dry cotton is the one thing we change. (a) False (b) True
6. 6.True or false: salt water is an acid. (a) True (b) False
7. 7.True or false: soap solution is an acid. (a) True (b) False
8. 8.🛟 Who should use the hot iron in the secret message experiment? (a) any child (b) only an adult (c) whoever is fastest (d) the youngest child
9. 9.🧺 Do we need a magnet for sprouting seeds? (a) not needed (b) needed
10. 10.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) folding paper (d) milk turning to curd
11. 11.True or false: baking a cake is a change that can be undone. (a) True (b) False
12. 12.True or false: mud from water is done by evaporating. (a) True (b) False
13. 13.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
14. 14.🍞 Which of these is something yeast does not need? (a) sugar (b) sunlight (c) time (d) warm water
15. 15.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) a battery cell (b) a balloon (c) vinegar (d) a tray for spills
16. 16.🧺 Which of these is not needed for sprouting seeds? (a) a small bowl (b) yeast (c) a few days (d) moong seeds
17. 17.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? What do we do with “the same paper”? (a) we keep it the same (b) we measure it (c) we change it
18. 18.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
19. 19.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the filter material is the one thing we change. (a) False (b) True
20. 20.⚖️ 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) sun or shade (b) the same kind of bag (c) amount of water drops
21. 21.True or false: cold water to rinse is not needed for making butter. (a) False (b) True
22. 22.True or false: tea leaves from tea is done by handpicking. (a) True (b) False
23. 23.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) turmeric powder (d) a balloon
24. 24.🌱 Is air needed for a seed to sprout? (a) not needed to sprout (b) needed to sprout
25. 25.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the same bottles”? (a) we change it (b) we keep it the same (c) we measure it
26. 26.🛟 Why should you never drink water just because it looks clear? (a) clear water is hot (b) clear water is salty (c) clear water is sweet (d) germs are invisible
27. 27.🌱 Is warmth needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
28. 28.True or false: sunlight is something yeast needs. (a) True (b) False
29. 29.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
30. 30.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a small bowl (b) moong seeds (c) yeast (d) cotton wool
31. 31.🛟 What should you do after touching soil or seeds? (a) skip washing (b) lick your fingers (c) wash your hands (d) rub your eyes
32. 32.🔍 Which is the odd one out? (a) reading the message (b) writing the message (c) letting the paper dry (d) ironing the paper
33. 33.🔍 Muddy water is left still for an hour. What happens to the mud? (a) it dissolves (b) it sinks to the bottom (c) it floats on top (d) it turns to sand
34. 34.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a magnet (c) an indicator (d) a pulley
35. 35.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a potted plant (c) vinegar (d) a magnet
36. 36.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: how clear the water is is kept the same. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) small pebbles (d) table salt
38. 38.🔮 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
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) yeast (d) salt
40. 40.🧺 Which of these is not needed for the yeast balloon? (a) a battery cell (b) a small bottle (c) warm water (d) sugar

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