Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 320 · 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.🫗 Which of these is done by sieving? (a) bran from wheat flour (b) sugar from sugar water (c) tea leaves from tea (d) salt from sea water
2. 2.⚖️ 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
3. 3.🍋 Which of these steps is a job for an adult? (a) reading the message (b) writing the message (c) ironing the paper (d) letting the paper dry
4. 4.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the same glass is the one thing we change. (a) False (b) True
5. 5.⚖️ 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) False (b) True
6. 6.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) crystals grow faster (d) it fizzes
7. 7.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) bright blue (c) green (d) white at once
8. 8.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
9. 9.🛟 What should you do after handling muddy water? (a) wash hands afterwards (b) lick your fingers (c) nothing is needed (d) wipe hands on face
10. 10.True or false: detergent water is a base. (a) False (b) True
11. 11.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) sugar (d) baking soda
12. 12.🧂 Which of these dissolves in water? (a) sugar (b) chalk powder (c) small pebbles (d) sand
13. 13.True or false: a mirror is needed for the secret lemon message. (a) False (b) True
14. 14.⚖️ Fair test — does more baking soda blow the balloon up bigger? What do we do with “spoons of baking soda”? (a) we keep it the same (b) we change it (c) we measure it
15. 15.🔍 Which is the odd one out? (a) freezing water (b) melting butter (c) cooking an egg (d) dissolving salt
16. 16.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) muddy water (c) a balloon (d) sand and pebbles
17. 17.🫧 Is salt water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
18. 18.📘 The browning of lemon juice with heat is a ___ change. (a) chemical (b) physical (c) musical (d) magnetic
19. 19.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of yeast is what we measure. (a) False (b) True
20. 20.⚖️ Fair test — do seeds need water to sprout? Which of these is the one thing we change? (a) the same bowls (b) the number of seeds (c) wet or dry cotton (d) how many seeds sprout
21. 21.🛟 What should you do if vinegar splashes in your eye? (a) rub it hard (b) ignore it (c) rinse with clean water (d) add baking soda
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a magnet (c) salt (d) a spoon
23. 23.🛟 Why is a plastic jar a good choice for shaking? (a) it is heavier (b) it is hotter (c) it will not break (d) it is magnetic
24. 24.True or false: a cotton bud is needed for the secret lemon message. (a) False (b) True
25. 25.🌱 Is water needed for a seed to sprout? (a) needed to sprout (b) not needed to sprout
26. 26.🧺 Three of these are needed for the fizzy balloon. Which one is NOT needed? (a) an empty bottle (b) a funnel or spoon (c) a magnet (d) vinegar
27. 27.True or false: dissolving salt is a change that cannot be undone. (a) True (b) False
28. 28.True or false: rusting iron is a change that can be undone. (a) True (b) False
29. 29.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
30. 30.True or false: salt water is neutral. (a) False (b) True
31. 31.True or false: a few hours is needed for the leafy bag test. (a) True (b) False
32. 32.🔮 Can the brown writing go back to being invisible? (a) no, it stays brown (b) yes, if cooled (c) yes, in the dark (d) yes, if shaken
33. 33.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) a funnel (c) a balloon (d) cotton or cloth
34. 34.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
35. 35.🔮 Predict: you use more vinegar and more baking soda. What happens to the balloon? (a) there is no change (b) it shrinks (c) it grows bigger (d) it turns blue
36. 36.True or false: turmeric powder is not needed for the secret lemon message. (a) False (b) True
37. 37.🧺 Three of these are needed for the leafy bag test. Which one is NOT needed? (a) sunlight (b) a rubber band (c) yeast (d) a potted plant
38. 38.🪴 Which of these is a job of the stem? (a) make food in sunlight (b) take in water from soil (c) hold the plant in soil (d) carry water upward
39. 39.🌱 Which of these is needed for a seed to sprout? (a) sugar (b) warmth (c) soil (d) salt
40. 40.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve

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