Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 157 · 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: tamarind water is a base. (a) False (b) True
2. 2.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
3. 3.🧺 Do we need fresh cream for making butter? (a) not needed (b) needed
4. 4.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
5. 5.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) reading the message (c) writing the message (d) cutting the lemon
6. 6.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) the ink is magnetic (c) the paper ate it (d) it turned into air
7. 7.🌱 Which of these is not needed for a seed to sprout? (a) air (b) water (c) sunlight (d) warmth
8. 8.🫧 What do you see when baking soda meets vinegar? (a) it glows in the dark (b) it turns to ice (c) lots of fizzy bubbles (d) nothing at all
9. 9.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) sugar crystals form (d) it turns to oil
10. 10.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? Which of these is what we measure? (a) the same funnel (b) the same muddy water (c) the same glass (d) how clear the water is
11. 11.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
12. 12.⚖️ Fair test — does a cloth filter or a cotton filter give clearer water? True or false: the amount poured is what we measure. (a) True (b) False
13. 13.True or false: sand dissolves in water. (a) True (b) False
14. 14.🛟 Why must children keep their fingers away from the iron? (a) it is sticky (b) it is cold (c) it can burn skin (d) it is magnetic
15. 15.📘 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
16. 16.🛟 The water for the yeast should be ___. (a) very salty (b) boiling hot (c) ice cold (d) warm, not hot
17. 17.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? Which of these is the one thing we change? (a) amount of water drops (b) the kind of plant (c) sun or shade (d) the size of the plant
18. 18.🌱 Which of these is needed for a seed to sprout? (a) sunlight (b) sugar (c) water (d) soil
19. 19.⚖️ 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) the same muddy water
20. 20.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a few days (b) cotton wool (c) water (d) a magnet
21. 21.🧺 Do we need a mirror for the secret lemon message? (a) not needed (b) needed
22. 22.🧺 Do we need a battery cell for the secret lemon message? (a) needed (b) not needed
23. 23.True or false: baking soda is needed for the fizzy balloon. (a) False (b) True
24. 24.True or false: a mirror is not needed for the fizzy balloon. (a) False (b) True
25. 25.True or false: turmeric powder is not needed for the muddy water filter. (a) False (b) True
26. 26.🧺 Three of these are needed for making butter. Which one is NOT needed? (a) turmeric powder (b) a timer (c) a bowl (d) fresh cream
27. 27.True or false: a funnel is needed for the muddy water filter. (a) True (b) False
28. 28.⚖️ Fair test — does cold cream turn into butter faster than warm cream? Which of these is what we measure? (a) time to make butter (b) the cream temperature (c) the same jar (d) the amount of cream
29. 29.True or false: ironing the paper is a job a child can do. (a) True (b) False
30. 30.🍋 Secret message: who does this step — dipping the cotton bud? (a) an adult does it (b) a child can do it
31. 31.🔍 Which is the odd one out? (a) plain water (b) lemon juice (c) salt water (d) sugar water
32. 32.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it shrinks to nothing (b) it turns to bread (c) the balloon is bigger (d) the balloon is smaller
33. 33.🧺 Which of these is not needed for the muddy water filter? (a) a clean glass (b) yeast (c) sand and pebbles (d) cotton or cloth
34. 34.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: the same jar is the one thing we change. (a) True (b) False
35. 35.True or false: salt water is neutral. (a) True (b) False
36. 36.🍋 Which of these steps is a job for an adult? (a) letting the paper dry (b) ironing the paper (c) writing the message (d) dipping the cotton bud
37. 37.True or false: reading the message is a job a child can do. (a) True (b) False
38. 38.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
39. 39.True or false: salt is not needed for growing salt crystals. (a) False (b) True
40. 40.🧺 Which of these is needed for sprouting seeds? (a) a mirror (b) turmeric powder (c) cotton wool (d) a magnet

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