Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 462 · 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.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
2. 2.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny stars (b) tiny spheres (c) tiny cubes (d) tiny triangles
3. 3.🧺 Do we need warm water for growing salt crystals? (a) needed (b) not needed
4. 4.True or false: cooking an egg is a change that can be undone. (a) True (b) False
5. 5.🔍 Which is the odd one out? (a) table salt (b) glucose powder (c) food colour (d) sand
6. 6.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
7. 7.🔍 Which is the odd one out? (a) baking soda (b) glucose powder (c) sawdust (d) food colour
8. 8.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a spoon (c) yeast (d) a piece of string
9. 9.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a shallow dish (c) salt (d) a mirror
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) safe from small children (d) in a busy doorway
11. 11.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) sugar crystals form (d) it turns to butter
12. 12.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
13. 13.⚖️ 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
14. 14.🧈 Which of these is a change that can be undone? (a) freezing water (b) baking a cake (c) browning lemon ink (d) cooking an egg
15. 15.True or false: baking a cake is a change that cannot be undone. (a) False (b) True
16. 16.True or false: food colour dissolves in water. (a) False (b) True
17. 17.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
18. 18.True or false: sawdust dissolves in water. (a) False (b) True
19. 19.⚖️ 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 measure it (b) we change it (c) we keep it the same
20. 20.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.True or false: cooking oil dissolves in water. (a) False (b) True
22. 22.True or false: sand does not dissolve in water. (a) False (b) True
23. 23.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
24. 24.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
25. 25.True or false: chalk powder does not dissolve in water. (a) False (b) True
26. 26.🧈 Which of these is a change that can be undone? (a) melting ice (b) browning lemon ink (c) rusting iron (d) baking a cake
27. 27.⚖️ 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 salt (b) sunny or shady place (c) the kind of salt (d) days to see crystals
28. 28.⚖️ 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 change it (b) we measure it (c) we keep it the same
29. 29.⚖️ 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 measure it (b) we keep it the same (c) we change it
30. 30.True or false: melting butter is a change that cannot be undone. (a) False (b) True
31. 31.⚖️ 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
32. 32.🛟 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
33. 33.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) rusting iron (d) melting butter
34. 34.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
35. 35.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
36. 36.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
37. 37.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
38. 38.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
39. 39.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
40. 40.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) small pebbles (d) sugar

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