Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 206 · 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.⚖️ 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) sunny or shady place (b) days to see crystals (c) the amount of salt (d) the amount of water
2. 2.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
3. 3.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) a balloon (d) a spoon
4. 4.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
5. 5.True or false: cooking oil dissolves in water. (a) False (b) True
6. 6.⚖️ 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) False (b) True
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) on the edge of a table (d) safe from small children
8. 8.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) cooking an egg (c) dissolving salt (d) rusting iron
9. 9.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
10. 10.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) rusting iron (c) freezing water (d) melting butter
11. 11.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
12. 12.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
13. 13.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) the amount of salt (b) days to see crystals (c) the same dish (d) the amount of water
14. 14.True or false: a magnet is not needed for growing salt crystals. (a) True (b) False
15. 15.True or false: small pebbles dissolves in water. (a) True (b) False
16. 16.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) table salt (d) chalk powder
17. 17.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) yeast (d) salt
18. 18.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
19. 19.🔍 Which is the odd one out? (a) sugar (b) food colour (c) chalk powder (d) glucose powder
20. 20.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) a magnet (d) a shallow dish
22. 22.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True
23. 23.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) bigger crystals (d) liquid crystals
25. 25.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) saturated (d) magnetic
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
27. 27.⚖️ 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
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) sunny or shady place (b) days to see crystals (c) the amount of salt
29. 29.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
30. 30.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
31. 31.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) True (b) False
33. 33.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) baking soda (d) sawdust
34. 34.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) salt crystals form (d) sugar crystals form
35. 35.True or false: sand dissolves in water. (a) True (b) False
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) a spoon (d) a battery cell
37. 37.True or false: a battery cell is needed for growing salt crystals. (a) False (b) True
38. 38.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting butter (c) freezing water (d) milk turning to curd
39. 39.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) glucose powder (d) table salt
40. 40.True or false: small pebbles does not dissolve in water. (a) False (b) True

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