Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 397 · 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.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil
2. 2.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a magnet (c) lemon juice (d) a battery cell
3. 3.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
4. 4.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
5. 5.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
6. 6.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
7. 7.🧺 Which of these is needed for the secret lemon message? (a) a balloon (b) a small bowl (c) a battery cell (d) turmeric powder
8. 8.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) a funnel (b) a mirror (c) muddy water (d) sand and pebbles
9. 9.🍞 Why does yeast work slowly in cold water? (a) cold water is heavy (b) cold makes it pink (c) cold slows yeast down (d) cold kills sugar
10. 10.⚖️ Fair test — do seeds need water to sprout? Which of these is what we measure? (a) wet or dry cotton (b) the number of seeds (c) the same bowls (d) how many seeds sprout
11. 11.⚖️ Fair test — does cold cream turn into butter faster than warm cream? True or false: how hard we shake is the one thing we change. (a) False (b) True
12. 12.🍞 Does yeast need time to make gas? (a) yeast does not need it (b) yeast needs it
13. 13.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “sun or shade”? (a) we change it (b) we keep it the same (c) we measure it
14. 14.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) the paper ate it (c) it turned into air (d) the ink is magnetic
15. 15.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) sand and pebbles (b) a magnet (c) cotton or cloth (d) muddy water
16. 16.🍋 Which of these steps is a job for an adult? (a) writing the message (b) reading the message (c) letting the paper dry (d) cutting the lemon
17. 17.🔍 Which is the odd one out? (a) salt water (b) sugar water (c) plain water (d) baking soda water
18. 18.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we measure it (c) we keep it the same
20. 20.True or false: a seed is not needed for the fizzy balloon. (a) False (b) True
21. 21.🧺 Which of these is needed for the muddy water filter? (a) a battery cell (b) turmeric powder (c) a magnet (d) muddy water
22. 22.🧺 Which of these is needed for sprouting seeds? (a) a battery cell (b) a few days (c) a mirror (d) a magnet
23. 23.🔍 Which is the odd one out? (a) water (b) soil (c) air (d) warmth
24. 24.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is the one thing we change. (a) True (b) False
25. 25.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is what we measure? (a) the ironing time (b) the same paper (c) the kind of juice (d) how dark the writing is
26. 26.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
27. 27.🌱 Seeds need water, air and ___ to sprout. (a) salt (b) soil (c) sugar (d) warmth
28. 28.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) melting ice (c) folding paper (d) browning lemon ink
29. 29.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of water is the one thing we change. (a) True (b) False
30. 30.True or false: make seeds is a job of the roots. (a) True (b) False
31. 31.True or false: a tray for spills is not needed for the fizzy balloon. (a) True (b) False
32. 32.⚖️ 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
33. 33.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is what we measure? (a) the same bottle (b) spoons of baking soda (c) size of the balloon (d) the amount of vinegar
34. 34.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) sand (d) sugar
35. 35.True or false: an empty bottle is not needed for the fizzy balloon. (a) True (b) False
36. 36.True or false: a magnet is needed for the turmeric test. (a) True (b) False
37. 37.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it grows much faster (b) it turns yellow (c) it grows very little (d) it bursts at once
38. 38.True or false: a clear plastic bag is not needed for the leafy bag test. (a) False (b) True
39. 39.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
40. 40.🔍 What do you see after shaking cream in a jar for a long time? (a) bubbles of gas (b) lumps of butter (c) sugar crystals (d) clear water only

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