Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 687 · 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? What do we do with “the amount of water”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.True or false: yeast is needed for growing salt crystals. (a) False (b) True
3. 3.🔮 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
4. 4.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
5. 5.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) chalk powder (d) table salt
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) yeast (b) a piece of string (c) a spoon (d) warm water
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) a friend who is running (c) the youngest child (d) nobody needs to
8. 8.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
9. 9.⚖️ 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
10. 10.🧂 Which of these does not dissolve in water? (a) glucose powder (b) baking soda (c) sugar (d) small pebbles
11. 11.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
12. 12.True or false: baking a cake is a change that cannot be undone. (a) True (b) False
13. 13.⚖️ 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
14. 14.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) yeast (c) salt (d) a battery cell
15. 15.⚖️ 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 water (b) sunny or shady place (c) the amount of salt (d) days to see crystals
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a spoon (d) a mirror
17. 17.True or false: cooking an egg is a change that cannot be undone. (a) False (b) True
18. 18.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
19. 19.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) chalk powder (d) sugar
20. 20.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) turmeric powder (d) a shallow dish
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) yeast (d) a piece of string
23. 23.⚖️ 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
24. 24.⚖️ 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
25. 25.True or false: milk turning to curd is a change that cannot be undone. (a) False (b) True
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.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
28. 28.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) a balloon (d) a piece of string
30. 30.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny spheres (c) tiny stars (d) tiny cubes
31. 31.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
32. 32.⚖️ 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 keep it the same (c) we change it
33. 33.🧈 Can this change be undone: dissolving salt? (a) cannot be undone (b) can be undone
34. 34.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
35. 35.🔍 Which is the odd one out? (a) baking soda (b) food colour (c) sawdust (d) sugar
36. 36.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) salt (d) a battery cell
37. 37.🧂 Which of these dissolves in water? (a) table salt (b) sawdust (c) chalk powder (d) sand
38. 38.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) melting butter (c) folding paper (d) milk turning to curd
39. 39.🔍 Which is the odd one out? (a) sugar (b) sand (c) table salt (d) baking soda
40. 40.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to change its colour (c) to make it fizz (d) to make it very salty

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