Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 791 · 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 a change that cannot be undone? (a) melting ice (b) milk turning to curd (c) melting butter (d) folding paper
2. 2.⚖️ 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) True (b) False
3. 3.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) sugar crystals form (d) it turns to butter
4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
5. 5.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
6. 6.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny cubes (d) tiny stars
7. 7.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) dissolving salt (d) browning lemon ink
8. 8.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
9. 9.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) warm water (c) salt (d) a spoon
11. 11.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) browning lemon ink (c) dissolving salt (d) melting butter
12. 12.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
13. 13.🧂 Does small pebbles dissolve in water? (a) dissolves in water (b) does not dissolve
14. 14.🔍 Which is the odd one out? (a) sugar (b) small pebbles (c) sawdust (d) sand
15. 15.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) a battery cell (d) a spoon
16. 16.⚖️ 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 change it (c) we keep it the same
17. 17.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) saturated (c) frozen (d) empty
18. 18.⚖️ 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
19. 19.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is kept the same. (a) False (b) True
20. 20.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to cool the water (d) to change its colour
21. 21.🔍 Which is the odd one out? (a) chalk powder (b) glucose powder (c) sugar (d) table salt
22. 22.🧈 Can this change be undone: milk turning to curd? (a) can be undone (b) cannot be undone
23. 23.⚖️ 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) sunny or shady place (c) the amount of salt
24. 24.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) melting ice (c) cooking an egg (d) freezing water
25. 25.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
26. 26.🧂 Which of these does not dissolve in water? (a) sawdust (b) food colour (c) baking soda (d) sugar
27. 27.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
28. 28.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a battery cell (c) a magnet (d) a piece of string
29. 29.🔍 Which is the odd one out? (a) food colour (b) sugar (c) table salt (d) sand
30. 30.True or false: glucose powder does not dissolve in water. (a) True (b) False
31. 31.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) salt (d) a magnet
32. 32.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
33. 33.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
34. 34.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) salt eats water (c) the dish melts (d) water evaporates
35. 35.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) chalk powder (d) table salt
36. 36.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
37. 37.⚖️ 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 measure it (b) we change it (c) we keep it the same
38. 38.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) table salt (d) sawdust
39. 39.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) freezing water (c) cooking an egg (d) rusting iron
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a piece of string (c) a spoon (d) yeast

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