Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 203 · 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.🧺 Do we need a piece of string for growing salt crystals? (a) not needed (b) needed
2. 2.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
3. 3.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) nobody needs to (d) a grown-up
4. 4.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny stars (d) tiny triangles
5. 5.🧂 Which of these dissolves in water? (a) food colour (b) sand (c) chalk powder (d) small pebbles
6. 6.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
7. 7.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is kept the same. (a) True (b) False
8. 8.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) safe from small children (d) next to the baby
9. 9.🧂 Which of these does not dissolve in water? (a) food colour (b) sugar (c) glucose powder (d) chalk powder
10. 10.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) yeast (c) warm water (d) a magnet
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a shallow dish (d) a mirror
12. 12.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) a battery cell (d) a spoon
14. 14.True or false: melting ice is a change that can be undone. (a) False (b) True
15. 15.🧂 Does glucose powder 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? What do we do with “the same dish”? (a) we measure it (b) we change it (c) we keep it the same
17. 17.True or false: folding paper is a change that cannot be undone. (a) False (b) True
18. 18.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a magnet (b) a piece of string (c) warm water (d) salt
19. 19.⚖️ 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 keep it the same (c) we measure it
20. 20.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) table salt (d) sand
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a shallow dish (b) a balloon (c) a mirror (d) a magnet
22. 22.True or false: melting butter is a change that cannot be undone. (a) False (b) True
23. 23.True or false: cooking an egg is a change that can be undone. (a) True (b) False
24. 24.True or false: sand dissolves in water. (a) True (b) False
25. 25.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it fizzes (b) crystals grow faster (c) few or no crystals (d) it turns sweet
26. 26.⚖️ 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 amount of water (c) the amount of salt (d) days to see crystals
27. 27.True or false: sugar does not dissolve in water. (a) True (b) False
28. 28.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
29. 29.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
30. 30.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
31. 31.🧈 Which of these is a change that can be undone? (a) baking a cake (b) browning lemon ink (c) cooking an egg (d) melting ice
32. 32.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
33. 33.True or false: salt is needed for growing salt crystals. (a) True (b) False
34. 34.🧂 Which of these does not dissolve in water? (a) food colour (b) small pebbles (c) glucose powder (d) sugar
35. 35.🧺 Which of these is needed for growing salt crystals? (a) salt (b) turmeric powder (c) a battery cell (d) a mirror
36. 36.True or false: freezing water is a change that cannot be undone. (a) True (b) False
37. 37.⚖️ 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
38. 38.📘 What do we call a solution that cannot dissolve any more salt? (a) saturated (b) frozen (c) empty (d) magnetic
39. 39.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) turmeric powder (d) a shallow dish
40. 40.⚖️ 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 water (b) the amount of salt (c) sunny or shady place (d) days to see crystals

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