Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 284 · 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.⚖️ 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
2. 2.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) sugar (d) sawdust
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
4. 4.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
5. 5.⚖️ 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 keep it the same (b) we change it (c) we measure it
6. 6.📘 What do we call a solution that cannot dissolve any more salt? (a) empty (b) frozen (c) magnetic (d) saturated
7. 7.🔍 Which is the odd one out? (a) small pebbles (b) sand (c) sugar (d) cooking oil
8. 8.⚖️ 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
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.True or false: sawdust does not dissolve in water. (a) True (b) False
11. 11.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
13. 13.⚖️ 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 measure it (b) we keep it the same (c) we change it
14. 14.🧈 Can this change be undone: rusting iron? (a) cannot be undone (b) can be undone
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) next to the baby (d) in a busy doorway
16. 16.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is kept the same. (a) True (b) False
17. 17.True or false: table salt dissolves in water. (a) True (b) False
18. 18.⚖️ 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) days to see crystals (d) sunny or shady place
19. 19.🧂 Which of these dissolves in water? (a) cooking oil (b) sawdust (c) chalk powder (d) sugar
20. 20.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) milk turning to curd (c) melting ice (d) folding paper
21. 21.⚖️ 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 amount of salt (c) days to see crystals
22. 22.True or false: sawdust dissolves in water. (a) False (b) True
23. 23.🧺 Do we need a balloon for growing salt crystals? (a) not needed (b) needed
24. 24.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) sand (d) sugar
25. 25.True or false: baking soda does not dissolve in water. (a) True (b) False
26. 26.🧈 Which of these is a change that can be undone? (a) milk turning to curd (b) folding paper (c) browning lemon ink (d) cooking an egg
27. 27.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
28. 28.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a spoon (c) a shallow dish (d) a piece of string
29. 29.🔍 Which is the odd one out? (a) sugar (b) food colour (c) chalk powder (d) baking soda
30. 30.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
31. 31.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
32. 32.🔍 Which is the odd one out? (a) baking soda (b) sawdust (c) sand (d) small pebbles
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a piece of string (d) a magnet
34. 34.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) the dish melts (d) salt eats water
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a battery cell (c) a spoon (d) salt
36. 36.🔍 Which is the odd one out? (a) sawdust (b) food colour (c) cooking oil (d) chalk powder
37. 37.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
38. 38.🔍 Which is the odd one out? (a) sugar (b) small pebbles (c) glucose powder (d) baking soda
39. 39.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it very salty (d) to make it fizz
40. 40.True or false: cooking oil dissolves in water. (a) True (b) False

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