Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 893 · 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.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to make it very salty (c) to cool the water (d) to make it fizz
2. 2.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) folding paper (c) melting ice (d) milk turning to curd
3. 3.True or false: melting butter is a change that cannot be undone. (a) False (b) True
4. 4.⚖️ 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 keep it the same (c) we change it
5. 5.🧺 Do we need a spoon for growing salt crystals? (a) not needed (b) needed
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) a piece of string (d) warm water
7. 7.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) the youngest child (c) a friend who is running (d) a grown-up
8. 8.🧂 Which of these does not dissolve in water? (a) cooking oil (b) table salt (c) food colour (d) glucose powder
9. 9.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is what we measure. (a) False (b) True
10. 10.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) salt (d) a balloon
11. 11.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
12. 12.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) table salt (d) sawdust
13. 13.True or false: a piece of string is needed for growing salt crystals. (a) True (b) False
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) the same dish (b) sunny or shady place (c) days to see crystals
15. 15.🧺 Do we need salt for growing salt crystals? (a) needed (b) not needed
16. 16.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
17. 17.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
18. 18.🔍 Which is the odd one out? (a) table salt (b) food colour (c) sugar (d) cooking oil
19. 19.🧂 Which of these dissolves in water? (a) small pebbles (b) sawdust (c) baking soda (d) cooking oil
20. 20.⚖️ 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 change it (b) we keep it the same (c) we measure it
21. 21.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
22. 22.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it turns sweet (c) it fizzes (d) crystals grow faster
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) turmeric powder (d) a shallow dish
24. 24.True or false: table salt does not dissolve in water. (a) False (b) True
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a magnet (c) a piece of string (d) salt
26. 26.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
27. 27.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) safe from small children (c) in a busy doorway (d) next to the baby
28. 28.True or false: freezing water is a change that cannot be undone. (a) True (b) False
29. 29.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
30. 30.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
31. 31.🧺 Do we need a battery cell for growing salt crystals? (a) needed (b) not needed
32. 32.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny triangles (b) tiny stars (c) tiny cubes (d) tiny spheres
33. 33.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a piece of string (d) yeast
34. 34.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
35. 35.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) table salt (d) cooking oil
36. 36.🧺 Do we need yeast for growing salt crystals? (a) needed (b) not needed
37. 37.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
38. 38.True or false: folding paper is a change that cannot be undone. (a) False (b) True
39. 39.True or false: salt is needed for growing salt crystals. (a) False (b) True
40. 40.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a spoon (c) a shallow dish (d) yeast

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