Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 632 · 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.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
2. 2.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) freezing water (c) rusting iron (d) baking a cake
3. 3.⚖️ 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 keep it the same (b) we measure it (c) we change it
4. 4.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) salt crystals form (d) sugar crystals form
5. 5.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
6. 6.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a piece of string (d) yeast
7. 7.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
8. 8.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) empty (d) magnetic
9. 9.🛟 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
10. 10.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) food colour (d) small pebbles
11. 11.True or false: melting ice is a change that cannot be undone. (a) True (b) False
12. 12.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) warm water (c) a spoon (d) salt
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) warm water (c) salt (d) yeast
15. 15.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a shallow dish (c) yeast (d) a spoon
16. 16.True or false: sugar does not dissolve in water. (a) True (b) False
17. 17.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) salt grows roots (c) water evaporates (d) the dish melts
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) turmeric powder (c) a spoon (d) salt
19. 19.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a battery cell (d) warm water
21. 21.⚖️ 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 keep it the same (b) we measure it (c) we change it
22. 22.⚖️ 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 keep it the same (c) we change it
23. 23.True or false: salt is not needed for growing salt crystals. (a) True (b) False
24. 24.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) liquid crystals (c) smaller crystals (d) no crystals
25. 25.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny triangles (c) tiny cubes (d) tiny spheres
26. 26.🧂 Which of these does not dissolve in water? (a) sugar (b) chalk powder (c) table salt (d) food colour
27. 27.True or false: cooking oil dissolves in water. (a) False (b) True
28. 28.True or false: freezing water is a change that cannot be undone. (a) False (b) True
29. 29.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
30. 30.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
31. 31.🔍 Which is the odd one out? (a) sand (b) glucose powder (c) sawdust (d) chalk powder
32. 32.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
33. 33.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
34. 34.⚖️ 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 kind of salt (c) days to see crystals (d) the same dish
35. 35.True or false: baking soda does not dissolve in water. (a) True (b) False
36. 36.True or false: yeast is needed for growing salt crystals. (a) False (b) True
37. 37.🔍 Which is the odd one out? (a) food colour (b) sugar (c) glucose powder (d) chalk powder
38. 38.⚖️ 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) False (b) True
39. 39.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
40. 40.⚖️ 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

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