Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 985 · 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.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) a magnet (d) salt
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) turmeric powder (d) a piece of string
4. 4.⚖️ 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) the kind of salt (c) days to see crystals
5. 5.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to oil (c) it turns to butter (d) sugar crystals form
7. 7.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
8. 8.⚖️ 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
9. 9.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
10. 10.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
11. 11.True or false: glucose powder does not dissolve in water. (a) True (b) False
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) a magnet (b) salt (c) a piece of string (d) warm water
13. 13.🔍 Which is the odd one out? (a) sand (b) chalk powder (c) food colour (d) small pebbles
14. 14.⚖️ 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 change it (c) we measure it
15. 15.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
16. 16.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
17. 17.True or false: warm water is needed for growing salt crystals. (a) True (b) False
18. 18.True or false: cooking oil does not dissolve in water. (a) True (b) False
19. 19.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) turmeric powder (c) a shallow dish (d) a mirror
20. 20.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) small pebbles (d) food colour
21. 21.🔍 Which is the odd one out? (a) table salt (b) small pebbles (c) chalk powder (d) sawdust
22. 22.True or false: yeast is needed for growing salt crystals. (a) True (b) False
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) yeast (d) a piece of string
24. 24.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) cooking an egg (d) melting butter
25. 25.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
26. 26.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
27. 27.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) fish make it (d) sand is ground up
28. 28.True or false: melting ice is a change that can be undone. (a) False (b) True
29. 29.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.⚖️ 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
31. 31.True or false: a mirror is needed for growing salt crystals. (a) False (b) True
32. 32.🧈 Which of these is a change that can be undone? (a) baking a cake (b) cooking an egg (c) milk turning to curd (d) dissolving salt
33. 33.🧈 Can this change be undone: milk turning to curd? (a) cannot be undone (b) can be undone
34. 34.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
35. 35.🔍 Which is the odd one out? (a) small pebbles (b) cooking oil (c) sand (d) baking soda
36. 36.True or false: browning lemon ink is a change that can be undone. (a) False (b) True
37. 37.⚖️ 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) days to see crystals (b) the amount of water (c) sunny or shady place (d) the same dish
38. 38.True or false: a shallow dish is needed for growing salt crystals. (a) True (b) False
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a shallow dish (d) yeast
40. 40.⚖️ 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 change it (b) we measure it (c) we keep it the same

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