Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 269 · 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.True or false: cooking oil dissolves in water. (a) False (b) True
2. 2.⚖️ 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 kind of salt (b) sunny or shady place (c) the amount of water (d) the same dish
3. 3.🧈 Which of these is a change that can be undone? (a) baking a cake (b) freezing water (c) milk turning to curd (d) cooking an egg
4. 4.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) a grown-up (c) nobody needs to (d) the youngest child
5. 5.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a mirror (d) a piece of string
6. 6.🔍 Which is the odd one out? (a) glucose powder (b) sand (c) sugar (d) baking soda
7. 7.True or false: table salt does not dissolve in water. (a) True (b) False
8. 8.🛟 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
9. 9.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a battery cell (c) a shallow dish (d) warm water
10. 10.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) chalk powder (d) food colour
11. 11.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) liquid crystals (c) smaller crystals (d) bigger crystals
12. 12.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
13. 13.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
14. 14.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) rusting iron (d) dissolving salt
15. 15.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.⚖️ 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
17. 17.🧈 Can this change be undone: browning lemon ink? (a) cannot be undone (b) can be undone
18. 18.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
19. 19.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) yeast (c) a shallow dish (d) salt
20. 20.🧂 Which of these does not dissolve in water? (a) table salt (b) baking soda (c) sugar (d) sawdust
21. 21.🧂 Why do crystals appear as the dish dries? (a) water evaporates (b) salt grows roots (c) salt eats water (d) the dish melts
22. 22.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) it fizzes (d) few or no crystals
23. 23.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
24. 24.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny spheres (d) tiny cubes
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a balloon (c) a piece of string (d) warm water
26. 26.True or false: small pebbles dissolves in water. (a) False (b) True
27. 27.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
28. 28.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) baking a cake (c) folding paper (d) dissolving salt
29. 29.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) saturated (d) empty
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a piece of string (d) turmeric powder
31. 31.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a spoon (c) a battery cell (d) turmeric powder
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) False (b) True
33. 33.⚖️ 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 kind of salt
34. 34.True or false: sugar dissolves in water. (a) False (b) True
35. 35.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
36. 36.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
37. 37.🔮 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
38. 38.🧂 Which of these does not dissolve in water? (a) glucose powder (b) cooking oil (c) sugar (d) baking soda
39. 39.⚖️ 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 change it (c) we keep it the same
40. 40.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it fizz (c) to change its colour (d) to make it very salty

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