Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 409 · 40 questions

What you do (Dry out, crystals in): 1. An adult pours warm water into a cup. 2. Stir in salt, a spoon at a time, until no more dissolves. 3. Pour the salty water into a shallow dish and lay a string in it. 4. Leave it on a sunny windowsill, out of reach of small children, and check each day.

1. 1.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) salt (d) a balloon
2. 2.True or false: cooking an egg is a change that can be undone. (a) False (b) True
3. 3.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
4. 4.True or false: warm water is needed for growing salt crystals. (a) True (b) False
5. 5.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
6. 6.🔍 Which is the odd one out? (a) table salt (b) baking soda (c) glucose powder (d) sand
7. 7.🧂 Which of these does not dissolve in water? (a) small pebbles (b) glucose powder (c) food colour (d) baking soda
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is the one thing we change? (a) the amount of salt (b) days to see crystals (c) sunny or shady place (d) the amount of water
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) False (b) True
10. 10.🔍 Which is the odd one out? (a) sugar (b) sawdust (c) sand (d) cooking oil
11. 11.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
12. 12.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) small pebbles (d) baking soda
13. 13.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
14. 14.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) no crystals (c) smaller crystals (d) bigger crystals
15. 15.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
16. 16.🧈 Which of these is a change that can be undone? (a) freezing water (b) rusting iron (c) browning lemon ink (d) baking a cake
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a balloon (d) a spoon
18. 18.True or false: food colour dissolves in water. (a) False (b) True
19. 19.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
21. 21.🧈 Which of these is a change that can be undone? (a) baking a cake (b) rusting iron (c) milk turning to curd (d) dissolving salt
22. 22.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
23. 23.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) yeast (c) turmeric powder (d) warm water
24. 24.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) it turns to butter (d) salt crystals form
25. 25.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) water evaporates (d) salt eats water
26. 26.True or false: cooking an egg is a change that cannot be undone. (a) True (b) False
27. 27.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a friend who is running (c) a grown-up (d) nobody needs to
28. 28.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) a spoon (d) salt
30. 30.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🔍 Which is the odd one out? (a) small pebbles (b) chalk powder (c) table salt (d) cooking oil
32. 32.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) food colour (d) cooking oil
33. 33.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
34. 34.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
35. 35.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.True or false: baking soda dissolves in water. (a) False (b) True
37. 37.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the kind of salt”? (a) we measure it (b) we keep it the same (c) we change it
39. 39.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sawdust (d) sugar
40. 40.⚖️ 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

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