Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 553 · 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) the amount of salt (b) the kind of salt (c) the amount of water (d) sunny or shady place
2. 2.⚖️ 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 water
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) the youngest child (d) nobody needs to
4. 4.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) sugar (d) small pebbles
5. 5.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
6. 6.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) sea water evaporates (d) fish make it
7. 7.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) warm water (d) salt
8. 8.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
9. 9.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny stars (d) tiny cubes
11. 11.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) rusting iron (c) folding paper (d) freezing water
12. 12.True or false: sand does not dissolve in water. (a) True (b) False
13. 13.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
14. 14.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) sugar crystals form (c) it turns to butter (d) salt crystals form
15. 15.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a mirror (c) a battery cell (d) a spoon
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
18. 18.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) baking a cake (d) folding paper
19. 19.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to make it very salty (d) to cool the water
20. 20.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt eats water (c) salt grows roots (d) the dish melts
21. 21.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) a magnet (d) a piece of string
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a shallow dish (c) a piece of string (d) a spoon
23. 23.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) chalk powder (d) glucose powder
24. 24.🧈 Which of these is a change that cannot be undone? (a) cooking an egg (b) freezing water (c) folding paper (d) dissolving salt
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) turmeric powder (c) warm water (d) a piece of string
26. 26.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
27. 27.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
28. 28.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) on the edge of a table (c) in a busy doorway (d) next to the baby
29. 29.True or false: glucose powder dissolves in water. (a) True (b) False
30. 30.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) milk turning to curd (c) baking a cake (d) dissolving salt
31. 31.⚖️ 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 same dish
32. 32.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
33. 33.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
34. 34.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting butter (c) browning lemon ink (d) rusting iron
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we measure it (b) we change it (c) we keep it the same
36. 36.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
37. 37.⚖️ 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 change it (b) we measure it (c) we keep it the same
38. 38.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a battery cell (c) a magnet (d) turmeric powder
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
40. 40.True or false: a piece of string is needed for growing salt crystals. (a) False (b) True

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