Kitchen Chemistry Experiments Test Worksheet

Science experiments lesson 20: Part 2 test: kitchen chemistry and life · Set 746 · 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 sprouts in a few days? (a) seeds on wet cotton (b) boiled seeds (c) seeds in the freezer (d) seeds on dry cotton
2. 2.🫧 Is baking soda water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
3. 3.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) your best clothes (c) an old shirt or apron (d) a white party dress
4. 4.🔍 Which is the odd one out? (a) salt water (b) curd (c) sugar water (d) plain water
5. 5.🫗 Which of these is done by winnowing? (a) sugar from sugar water (b) gravel from fine sand (c) bad grains from rice (d) husk from rice grain
6. 6.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns blue (d) it turns black
7. 7.🫗 Which of these is done by sieving? (a) tea leaves from tea (b) gravel from fine sand (c) sugar from sugar water (d) bad grains from rice
8. 8.True or false: fresh cream is not needed for making butter. (a) True (b) False
9. 9.⚖️ Fair test — does more baking soda blow the balloon up bigger? True or false: the kind of balloon is kept the same. (a) True (b) False
10. 10.🧺 Three of these are needed for the muddy water filter. Which one is NOT needed? (a) muddy water (b) cotton or cloth (c) turmeric powder (d) a clean glass
11. 11.🧺 Do we need a mirror for the leafy bag test? (a) not needed (b) needed
12. 12.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
13. 13.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? Which of these is the one thing we change? (a) the water temperature (b) the amount of water (c) the amount of sugar (d) the same bottles
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the turmeric paper (c) the light we look in (d) the liquid we test
15. 15.🌱 Why do the seeds on dry cotton not sprout? (a) they are too wet (b) they have no water (c) they have no salt (d) they have no soil
16. 16.🫗 Muddy water is poured through a cloth filter. What stays on the cloth? (a) nothing (b) the water (c) the mud (d) the salt
17. 17.🧺 Do we need a rubber band for the leafy bag test? (a) not needed (b) needed
18. 18.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) in a busy doorway (d) on the edge of a table
19. 19.🌱 Which of these sprouts in a few days? (a) seeds on dry cotton (b) seeds in the freezer (c) wet seeds by a window (d) boiled seeds
20. 20.🔍 Which is the odd one out? (a) sugar water (b) lemon juice (c) plain water (d) salt water
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a piece of string (c) yeast (d) a mirror
22. 22.🔮 Predict: you leave out the sugar. What happens to the balloon? (a) it bursts at once (b) it turns yellow (c) it grows much faster (d) it grows very little
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we change it (b) we measure it (c) we keep it the same
24. 24.🛟 Why must a plastic bag never go over anyone’s head? (a) it changes colour (b) it is too big (c) it can block breathing (d) it gets wet
25. 25.🌱 Which of these is not needed for a seed to sprout? (a) air (b) warmth (c) soil (d) water
26. 26.⚖️ 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 keep it the same (b) we change it (c) we measure it
27. 27.🔮 Predict: you wait 2 hours instead of 10 minutes. What happens? (a) it turns to bread (b) the balloon is smaller (c) it shrinks to nothing (d) the balloon is bigger
28. 28.⚖️ 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) the same kind of bag (b) sun or shade (c) amount of water drops
29. 29.True or false: salt is needed for growing salt crystals. (a) True (b) False
30. 30.🛟 Which safety rule fits the fizzy balloon experiment? (a) shake it near your face (b) seal it in a glass jar (c) put it in your mouth (d) keep it away from eyes
31. 31.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
32. 32.True or false: turmeric powder is not needed for the yeast balloon. (a) True (b) False
33. 33.🍋 Why can’t you see the lemon writing once it dries? (a) it turned into air (b) the paper ate it (c) the ink is magnetic (d) dry juice is see-through
34. 34.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
35. 35.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? True or false: the amount of sugar is kept the same. (a) False (b) True
36. 36.⚖️ Fair test — does a plant in the sun give out more water than one in the shade? What do we do with “the kind of plant”? (a) we keep it the same (b) we measure it (c) we change it
37. 37.🌱 Seeds need water, air and ___ to sprout. (a) soil (b) sugar (c) warmth (d) salt
38. 38.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) a battery cell (c) a magnet (d) water
39. 39.⚖️ Fair test — does yeast blow up the balloon more with warm water or cold water? What do we do with “the amount of sugar”? (a) we keep it the same (b) we measure it (c) we change it
40. 40.🫗 Is filtered pond water safe to drink? (a) no, germs may stay (b) yes, always (c) yes, if it is clear (d) yes, if it is cold

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