Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 354 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) warm water (d) turmeric powder
2. 2.🔍 Which is the odd one out? (a) glucose powder (b) baking soda (c) sugar (d) small pebbles
3. 3.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
4. 4.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) sawdust (d) baking soda
6. 6.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) food colour (d) small pebbles
7. 7.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) next to the baby (c) on the edge of a table (d) in a busy doorway
8. 8.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is what we measure. (a) False (b) True
10. 10.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt grows roots (c) salt eats water (d) water evaporates
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) it turns sweet (c) few or no crystals (d) crystals grow faster
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) yeast (b) a piece of string (c) salt (d) warm water
13. 13.⚖️ 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 keep it the same (b) we change it (c) we measure it
14. 14.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) sand (d) glucose powder
15. 15.⚖️ 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 change it (b) we keep it the same (c) we measure it
16. 16.🔍 Which is the odd one out? (a) table salt (b) food colour (c) chalk powder (d) sugar
17. 17.🧈 Which of these is a change that can be undone? (a) folding paper (b) rusting iron (c) browning lemon ink (d) milk turning to curd
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
19. 19.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sawdust (d) glucose powder
20. 20.True or false: folding paper is a change that can be undone. (a) True (b) False
21. 21.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
22. 22.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) empty (c) magnetic (d) saturated
23. 23.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
24. 24.🧈 Which of these is a change that can be undone? (a) dissolving salt (b) cooking an egg (c) baking a cake (d) browning lemon ink
25. 25.🧺 Do we need a mirror for growing salt crystals? (a) needed (b) not needed
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a shallow dish (c) salt (d) warm water
27. 27.⚖️ 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) days to see crystals (c) the amount of salt
28. 28.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
29. 29.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) warm water (c) a spoon (d) a mirror
30. 30.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
31. 31.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
32. 32.⚖️ 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
33. 33.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
34. 34.⚖️ 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) the amount of salt (c) sunny or shady place (d) the same dish
35. 35.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
36. 36.⚖️ 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 change it (b) we measure it (c) we keep it the same
37. 37.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a battery cell (b) a spoon (c) a piece of string (d) a shallow dish
38. 38.🔍 Which is the odd one out? (a) glucose powder (b) small pebbles (c) sawdust (d) cooking oil
39. 39.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a piece of string (d) a mirror
40. 40.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water

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