Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 408 · 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.🧂 Which of these does not dissolve in water? (a) sugar (b) food colour (c) small pebbles (d) glucose powder
2. 2.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
3. 3.True or false: freezing water is a change that cannot be undone. (a) False (b) True
4. 4.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) yeast (c) a spoon (d) a piece of string
5. 5.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny stars (c) tiny triangles (d) tiny spheres
6. 6.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) salt (c) turmeric powder (d) a magnet
7. 7.True or false: melting ice is a change that cannot be undone. (a) False (b) True
8. 8.⚖️ 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) False (b) True
9. 9.🌊 How is salt made in salt pans by the sea? (a) fish make it (b) sea water evaporates (c) sand is ground up (d) salt rains down
10. 10.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
11. 11.⚖️ 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) True (b) False
12. 12.True or false: a spoon is not needed for growing salt crystals. (a) False (b) True
13. 13.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
14. 14.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) sugar crystals form (c) it turns to oil (d) salt crystals form
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) in a busy doorway (d) safe from small children
16. 16.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
17. 17.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) warm water (c) yeast (d) a magnet
18. 18.⚖️ 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
19. 19.⚖️ 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
20. 20.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
21. 21.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) yeast (c) warm water (d) salt
22. 22.⚖️ 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) True (b) False
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is the one thing we change. (a) True (b) False
24. 24.🧈 Which of these is a change that cannot be undone? (a) dissolving salt (b) melting butter (c) freezing water (d) browning lemon ink
25. 25.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is what we measure. (a) True (b) False
26. 26.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
27. 27.🛟 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
28. 28.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
29. 29.True or false: melting ice is a change that can be undone. (a) True (b) False
30. 30.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) folding paper (c) melting butter (d) dissolving salt
31. 31.🧂 Why do we stir in salt until no more will dissolve? (a) to make it very salty (b) to cool the water (c) to change its colour (d) to make it fizz
32. 32.🔍 Which is the odd one out? (a) sugar (b) food colour (c) table salt (d) sand
33. 33.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
34. 34.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a piece of string (c) turmeric powder (d) a balloon
35. 35.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) melting butter (c) browning lemon ink (d) rusting iron
36. 36.🔍 Which is the odd one out? (a) chalk powder (b) sawdust (c) baking soda (d) small pebbles
37. 37.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
38. 38.True or false: small pebbles dissolves in water. (a) False (b) True
39. 39.⚖️ 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 keep it the same (b) we change it (c) we measure it
40. 40.True or false: food colour does not dissolve in water. (a) True (b) False

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