Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 779 · 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: a shallow dish is not needed for growing salt crystals. (a) False (b) True
2. 2.⚖️ 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) False (b) True
3. 3.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) chalk powder (d) food colour
4. 4.🔍 Which is the odd one out? (a) glucose powder (b) sugar (c) table salt (d) small pebbles
5. 5.True or false: warm water is needed for growing salt crystals. (a) False (b) True
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “days to see crystals”? (a) we keep it the same (b) we change it (c) we measure it
7. 7.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
8. 8.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) salt (c) a spoon (d) a shallow dish
9. 9.🧂 Does sawdust dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.🧂 Which of these does not dissolve in water? (a) food colour (b) cooking oil (c) baking soda (d) table salt
11. 11.🧂 Why do we stir in salt until no more will dissolve? (a) to make it fizz (b) to change its colour (c) to cool the water (d) to make it very salty
12. 12.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
13. 13.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) freezing water (c) rusting iron (d) dissolving salt
14. 14.⚖️ 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) sunny or shady place (b) the same dish (c) the amount of salt (d) the amount of water
15. 15.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny cubes (c) tiny spheres (d) tiny stars
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a piece of string (c) a balloon (d) salt
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
18. 18.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
19. 19.🧈 Can this change be undone: baking a cake? (a) cannot be undone (b) can be undone
20. 20.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) turmeric powder (b) a shallow dish (c) a spoon (d) warm water
21. 21.True or false: yeast is not needed for growing salt crystals. (a) True (b) False
22. 22.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
23. 23.True or false: rusting iron is a change that cannot be undone. (a) True (b) False
24. 24.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a piece of string (c) turmeric powder (d) yeast
25. 25.🧂 Which of these does not dissolve in water? (a) glucose powder (b) food colour (c) small pebbles (d) table salt
26. 26.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
27. 27.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
28. 28.🧂 Which of these dissolves in water? (a) sand (b) cooking oil (c) table salt (d) sawdust
29. 29.True or false: baking a cake is a change that can be undone. (a) False (b) True
30. 30.True or false: table salt dissolves in water. (a) True (b) False
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 the one thing we change. (a) True (b) False
32. 32.🔍 Which is the odd one out? (a) sand (b) sugar (c) glucose powder (d) food colour
33. 33.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) liquid crystals (d) smaller crystals
34. 34.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
35. 35.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
36. 36.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
37. 37.⚖️ 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 keep it the same (c) we change it
38. 38.🔍 Which is the odd one out? (a) sugar (b) table salt (c) baking soda (d) cooking oil
39. 39.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) sugar crystals form (c) it turns to oil (d) it turns to butter
40. 40.True or false: cooking an egg is a change that can be undone. (a) True (b) False

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