Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 557 · 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.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
2. 2.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a balloon (d) a spoon
3. 3.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
4. 4.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) dissolving salt (c) browning lemon ink (d) freezing water
5. 5.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the amount of water (c) sunny or shady place
7. 7.🧺 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
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) a spoon (d) a shallow dish
9. 9.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
10. 10.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) salt (c) a spoon (d) a shallow dish
11. 11.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) freezing water (c) melting ice (d) folding paper
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) False (b) True
13. 13.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) rusting iron (d) dissolving salt
14. 14.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
15. 15.True or false: a balloon is not needed for growing salt crystals. (a) True (b) False
16. 16.True or false: sand dissolves in water. (a) False (b) True
17. 17.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) bigger crystals (c) liquid crystals (d) smaller crystals
18. 18.⚖️ 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) days to see crystals (c) the amount of water (d) the amount of salt
19. 19.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
20. 20.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
21. 21.True or false: a mirror is not needed for growing salt crystals. (a) True (b) False
22. 22.True or false: table salt dissolves in water. (a) False (b) True
23. 23.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) melting ice (c) cooking an egg (d) browning lemon ink
24. 24.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
25. 25.🔮 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
26. 26.⚖️ 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 salt (c) sunny or shady place (d) the same dish
27. 27.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a balloon (c) turmeric powder (d) warm water
28. 28.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) the dish melts (c) salt eats water (d) salt grows roots
29. 29.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) on the edge of a table (d) next to the baby
30. 30.🧂 Which of these does not dissolve in water? (a) food colour (b) table salt (c) small pebbles (d) sugar
31. 31.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
32. 32.True or false: baking soda does not dissolve in water. (a) False (b) True
33. 33.🧂 Which of these does not dissolve in water? (a) glucose powder (b) chalk powder (c) sugar (d) food colour
34. 34.True or false: sugar does not dissolve in water. (a) False (b) True
35. 35.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) a spoon (d) a battery cell
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) sunny or shady place (c) the kind of salt
37. 37.🧂 Which of these does not dissolve in water? (a) sugar (b) sand (c) table salt (d) glucose powder
38. 38.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False
39. 39.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
40. 40.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) sugar crystals form (d) it turns to oil

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