Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 168 · 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.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sand is ground up (c) sea water evaporates (d) salt rains down
2. 2.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) rusting iron (c) dissolving salt (d) milk turning to curd
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) warm water (d) turmeric powder
4. 4.🧂 Which of these dissolves in water? (a) sawdust (b) glucose powder (c) sand (d) small pebbles
5. 5.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
6. 6.⚖️ 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 measure it (b) we change it (c) we keep it the same
7. 7.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a balloon (c) salt (d) a spoon
9. 9.True or false: freezing water is a change that cannot be undone. (a) False (b) True
10. 10.🧺 Do we need turmeric powder for growing salt crystals? (a) needed (b) not needed
11. 11.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) melting ice (c) freezing water (d) folding paper
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
13. 13.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) on the edge of a table (d) in a busy doorway
14. 14.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
15. 15.True or false: salt is not needed for growing salt crystals. (a) False (b) True
16. 16.⚖️ 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 amount of water (d) the same dish
17. 17.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
18. 18.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
20. 20.True or false: yeast is needed for growing salt crystals. (a) True (b) False
21. 21.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.True or false: a shallow dish is not needed for growing salt crystals. (a) True (b) False
23. 23.True or false: folding paper is a change that cannot be undone. (a) True (b) False
24. 24.True or false: cooking oil does not dissolve in water. (a) False (b) True
25. 25.🔍 Which is the odd one out? (a) table salt (b) food colour (c) sand (d) glucose powder
26. 26.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
27. 27.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
28. 28.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
29. 29.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is the one thing we change. (a) False (b) True
30. 30.⚖️ 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 kind of salt (b) the amount of water (c) days to see crystals (d) the same dish
31. 31.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) warm water (c) a shallow dish (d) a spoon
32. 32.True or false: baking soda does not dissolve in water. (a) True (b) False
33. 33.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) rusting iron (c) melting butter (d) melting ice
34. 34.⚖️ 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
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) salt (d) a battery cell
36. 36.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) nobody needs to (c) the youngest child (d) a friend who is running
37. 37.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
38. 38.True or false: salt is needed for growing salt crystals. (a) False (b) True
39. 39.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) it turns to oil (c) sugar crystals form (d) salt crystals form
40. 40.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone

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