Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 146 · 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.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
2. 2.🧈 Which of these is a change that can be undone? (a) folding paper (b) cooking an egg (c) browning lemon ink (d) baking a cake
3. 3.True or false: warm water is needed for growing salt crystals. (a) False (b) True
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
6. 6.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny triangles (d) tiny cubes
7. 7.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) a piece of string (d) turmeric powder
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) salt (d) warm water
9. 9.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
10. 10.True or false: melting butter is a change that can be undone. (a) False (b) True
11. 11.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) safe from small children (c) next to the baby (d) on the edge of a table
13. 13.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) sawdust (d) cooking oil
14. 14.🧂 Which of these dissolves in water? (a) chalk powder (b) sawdust (c) sugar (d) small pebbles
15. 15.True or false: melting butter is a change that cannot be undone. (a) True (b) False
16. 16.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
17. 17.🧂 Which of these dissolves in water? (a) glucose powder (b) sawdust (c) cooking oil (d) small pebbles
18. 18.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) dissolving salt (c) baking a cake (d) melting ice
19. 19.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
20. 20.True or false: cooking an egg is a change that can be undone. (a) True (b) False
21. 21.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
22. 22.True or false: table salt does not dissolve in water. (a) True (b) False
23. 23.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
24. 24.True or false: sand dissolves in water. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) glucose powder (d) sand
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of salt (c) days to see crystals (d) the amount of water
27. 27.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the kind of salt (c) sunny or shady place
29. 29.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
30. 30.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) freezing water (c) browning lemon ink (d) folding paper
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a mirror (c) a shallow dish (d) a piece of string
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a balloon (c) a piece of string (d) a spoon
33. 33.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) saturated (c) empty (d) magnetic
34. 34.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
35. 35.⚖️ 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
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) False (b) True
37. 37.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
38. 38.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) melting butter (d) milk turning to curd
39. 39.⚖️ 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 measure it (c) we change it
40. 40.True or false: sand does not dissolve in water. (a) False (b) True

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