Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 630 · 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) turmeric powder (b) warm water (c) salt (d) a shallow dish
2. 2.⚖️ 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 measure it (b) we change it (c) we keep it the same
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a grown-up (d) a friend who is running
4. 4.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
5. 5.True or false: baking soda does not dissolve in water. (a) False (b) True
6. 6.🧂 Which of these dissolves in water? (a) sawdust (b) sand (c) baking soda (d) chalk powder
7. 7.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
8. 8.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) it fizzes (c) few or no crystals (d) crystals grow faster
9. 9.🧂 Which of these does not dissolve in water? (a) sugar (b) glucose powder (c) cooking oil (d) table salt
10. 10.🔍 Which is the odd one out? (a) cooking oil (b) chalk powder (c) table salt (d) sand
11. 11.⚖️ 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 amount of water (b) the same dish (c) days to see crystals (d) the kind of salt
12. 12.🛟 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
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) a spoon (d) a magnet
14. 14.🧺 Which of these is not needed for growing salt crystals? (a) a shallow dish (b) yeast (c) a piece of string (d) warm water
15. 15.True or false: dissolving salt is a change that can be undone. (a) False (b) True
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) False (b) True
17. 17.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
18. 18.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a piece of string (c) turmeric powder (d) a shallow dish
19. 19.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) sand (d) sugar
20. 20.True or false: small pebbles dissolves in water. (a) True (b) False
21. 21.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
22. 22.⚖️ 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 same dish (b) the amount of salt (c) the kind of salt (d) sunny or shady place
23. 23.🧈 Which of these is a change that can be undone? (a) rusting iron (b) dissolving salt (c) browning lemon ink (d) cooking an egg
24. 24.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
25. 25.⚖️ 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 keep it the same (c) we measure it
26. 26.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a balloon (c) a spoon (d) salt
27. 27.⚖️ 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
28. 28.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) milk turning to curd (c) rusting iron (d) folding paper
29. 29.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
30. 30.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to make it fizz (c) to cool the water (d) to change its colour
31. 31.🧈 Which of these is a change that can be undone? (a) freezing water (b) milk turning to curd (c) cooking an egg (d) baking a cake
32. 32.🔍 Which is the odd one out? (a) sawdust (b) chalk powder (c) food colour (d) sand
33. 33.True or false: sawdust dissolves in water. (a) False (b) True
34. 34.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
35. 35.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) salt eats water (c) salt grows roots (d) water evaporates
36. 36.🧂 Which of these dissolves in water? (a) glucose powder (b) small pebbles (c) chalk powder (d) sand
37. 37.🔍 Which is the odd one out? (a) food colour (b) glucose powder (c) cooking oil (d) baking soda
38. 38.🔍 Which is the odd one out? (a) food colour (b) sugar (c) table salt (d) small pebbles
39. 39.True or false: cooking oil dissolves in water. (a) True (b) False
40. 40.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty

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