Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 94 · 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: the adult irons for only one second. What happens? (a) writing turns green (b) the paper floats (c) it gets darker (d) writing stays faint
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) spoons of baking soda (c) the amount of vinegar (d) the same bottle
3. 3.🔍 Which is the odd one out? (a) air (b) soil (c) warmth (d) water
4. 4.🌱 Where does a sprouting seed get its first food from? (a) the cotton wool (b) the sunlight only (c) food stored in the seed (d) the air
5. 5.🧺 Three of these are needed for sprouting seeds. Which one is NOT needed? (a) a magnet (b) water (c) a small bowl (d) moong seeds
6. 6.🍋 Why can’t you see the lemon writing once it dries? (a) dry juice is see-through (b) it turned into air (c) the ink is magnetic (d) the paper ate it
7. 7.🪴 Which part of a plant does this job: make food in sunlight? (a) flower (b) leaves (c) roots (d) stem
8. 8.🍋 Secret message: who does this step — letting the paper dry? (a) an adult does it (b) a child can do it
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the amount of vinegar is kept the same. (a) True (b) False
10. 10.🛟 Which safety rule fits the fizzy balloon experiment? (a) seal it in a glass jar (b) shake it near your face (c) keep it away from eyes (d) put it in your mouth
11. 11.🧺 Which of these is not needed for the fizzy balloon? (a) an empty bottle (b) a balloon (c) baking soda (d) a mirror
12. 12.⚖️ Fair test — do seeds need water to sprout? What do we do with “the same bowls”? (a) we change it (b) we measure it (c) we keep it the same
13. 13.🍞 Which of these is something yeast does not need? (a) vinegar (b) sugar (c) time (d) warm water
14. 14.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
15. 15.🧺 Three of these are needed for the yeast balloon. Which one is NOT needed? (a) warm water (b) dry yeast (c) a magnet (d) a balloon
16. 16.True or false: sugar water is neutral. (a) False (b) True
17. 17.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
18. 18.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the water temperature is kept the same. (a) False (b) True
19. 19.🛟 What should you do if vinegar splashes in your eye? (a) add baking soda (b) rinse with clean water (c) rub it hard (d) ignore it
20. 20.🔍 Which is the odd one out? (a) baking soda water (b) sugar water (c) vinegar (d) lemon juice
21. 21.🧺 Do we need water for sprouting seeds? (a) not needed (b) needed
22. 22.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) it turns blue (c) it stays yellow (d) reddish-brown
23. 23.🪴 Where did the water inside the bag come from? (a) the rain (b) the rubber band (c) the leaves (d) the plastic
24. 24.True or false: water is not needed for sprouting seeds. (a) True (b) False
25. 25.🔍 What do you see inside the plastic bag after a few hours in the sun? (a) tiny insects (b) salt crystals (c) nothing at all (d) tiny water drops
26. 26.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
27. 27.True or false: salt water is neutral. (a) False (b) True
28. 28.🧺 Which of these is needed for the leafy bag test? (a) yeast (b) a few hours (c) turmeric powder (d) a battery cell
29. 29.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
30. 30.🧺 Which of these is not needed for the leafy bag test? (a) sunlight (b) a magnet (c) a few hours (d) a potted plant
31. 31.🧺 Do we need warm water for the yeast balloon? (a) needed (b) not needed
32. 32.🧺 Which of these is not needed for the muddy water filter? (a) a funnel (b) muddy water (c) a battery cell (d) sand and pebbles
33. 33.🧺 Which of these is needed for making butter? (a) a battery cell (b) yeast (c) cold water to rinse (d) a balloon
34. 34.🛟 What should you do after handling muddy water? (a) lick your fingers (b) nothing is needed (c) wipe hands on face (d) wash hands afterwards
35. 35.⚖️ 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) sun or shade (b) the same kind of bag (c) the kind of plant (d) amount of water drops
36. 36.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
37. 37.🔮 Predict: sprouts grow in the dark for a week. What colour are their leaves? (a) bright red (b) dark green (c) pale yellow (d) blue
38. 38.🧺 Which of these is needed for the fizzy balloon? (a) a mirror (b) a balloon (c) a comb (d) a battery cell
39. 39.⚖️ Fair test — does more baking soda blow the balloon up bigger? Which of these is the one thing we change? (a) spoons of baking soda (b) size of the balloon (c) the kind of balloon (d) the amount of vinegar
40. 40.⚖️ Fair test — does lemon juice or orange juice make darker secret writing? Which of these is kept the same? (a) how dark the writing is (b) the kind of juice (c) the iron setting

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