Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 563 · 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.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
2. 2.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a balloon (c) warm water (d) a mirror
3. 3.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
4. 4.True or false: melting butter is a change that can be undone. (a) True (b) False
5. 5.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting ice (c) cooking an egg (d) melting butter
6. 6.True or false: sawdust does not dissolve in water. (a) True (b) False
7. 7.🔍 Which is the odd one out? (a) food colour (b) table salt (c) baking soda (d) small pebbles
8. 8.True or false: melting ice is a change that cannot be undone. (a) False (b) True
9. 9.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
10. 10.True or false: milk turning to curd is a change that cannot be undone. (a) True (b) False
11. 11.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.⚖️ 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) sunny or shady place (c) the kind of salt (d) the same dish
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) the kind of salt (c) days to see crystals (d) sunny or shady place
14. 14.🧂 Which of these dissolves in water? (a) cooking oil (b) table salt (c) small pebbles (d) sawdust
15. 15.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to make it very salty (c) to change its colour (d) to cool the water
16. 16.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) fish make it (d) sea water evaporates
17. 17.True or false: food colour does not dissolve in water. (a) False (b) True
18. 18.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
19. 19.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) sawdust (d) food colour
20. 20.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a grown-up (c) the youngest child (d) a friend who is running
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a magnet (c) salt (d) warm water
22. 22.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
23. 23.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
24. 24.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) turmeric powder (c) a shallow dish (d) salt
26. 26.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we change it (c) we measure it
27. 27.⚖️ 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
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we measure it (b) we keep it the same (c) we change it
29. 29.True or false: folding paper is a change that cannot be undone. (a) False (b) True
30. 30.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
31. 31.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) no crystals (d) bigger crystals
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a battery cell (c) salt (d) a shallow dish
33. 33.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to butter (d) it turns to oil
34. 34.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) magnetic (c) empty (d) frozen
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) False (b) True
36. 36.True or false: sand does not dissolve in water. (a) True (b) False
37. 37.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a spoon (d) a battery cell
38. 38.🔍 Which is the odd one out? (a) food colour (b) sugar (c) glucose powder (d) sand
39. 39.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
40. 40.🧂 Which of these dissolves in water? (a) glucose powder (b) small pebbles (c) chalk powder (d) cooking oil

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