Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 87 · 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 salt for growing salt crystals? (a) needed (b) not needed
2. 2.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) crystals grow faster (c) it fizzes (d) it turns sweet
3. 3.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) cooking an egg (d) melting ice
4. 4.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
5. 5.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) next to the baby (c) safe from small children (d) in a busy doorway
6. 6.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a magnet (c) a piece of string (d) a mirror
7. 7.🔍 Which is the odd one out? (a) cooking oil (b) food colour (c) sawdust (d) sand
8. 8.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
9. 9.⚖️ 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
10. 10.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
11. 11.🛟 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
12. 12.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
13. 13.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) a piece of string (c) turmeric powder (d) salt
14. 14.⚖️ 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
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is the one thing we change. (a) False (b) True
16. 16.🔍 Which is the odd one out? (a) sand (b) small pebbles (c) sugar (d) sawdust
17. 17.🧺 Which of these is needed for growing salt crystals? (a) yeast (b) a battery cell (c) a spoon (d) a magnet
18. 18.🧈 Which of these is a change that can be undone? (a) rusting iron (b) baking a cake (c) dissolving salt (d) milk turning to curd
19. 19.True or false: freezing water is a change that can be undone. (a) False (b) True
20. 20.📘 What do we call a solution that cannot dissolve any more salt? (a) frozen (b) magnetic (c) empty (d) saturated
21. 21.True or false: a mirror is needed for growing salt crystals. (a) True (b) False
22. 22.🧈 Which of these is a change that can be undone? (a) folding paper (b) milk turning to curd (c) cooking an egg (d) baking a cake
23. 23.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of salt”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
25. 25.True or false: a spoon is needed for growing salt crystals. (a) False (b) True
26. 26.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
27. 27.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
28. 28.🧺 Do we need a shallow dish for growing salt crystals? (a) needed (b) not needed
29. 29.🧂 Which of these does not dissolve in water? (a) baking soda (b) sugar (c) food colour (d) chalk powder
30. 30.🧂 Which of these does not dissolve in water? (a) sand (b) table salt (c) glucose powder (d) food colour
31. 31.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
32. 32.🧂 Why do crystals appear as the dish dries? (a) salt grows roots (b) the dish melts (c) water evaporates (d) salt eats water
33. 33.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) a magnet (d) a mirror
34. 34.⚖️ 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 keep it the same (b) we measure it (c) we change it
35. 35.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) it turns to butter (c) salt crystals form (d) sugar crystals form
36. 36.🧈 Which of these is a change that cannot be undone? (a) baking a cake (b) melting ice (c) dissolving salt (d) freezing water
37. 37.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
38. 38.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) warm water (c) a shallow dish (d) a magnet
39. 39.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is kept the same? (a) days to see crystals (b) the amount of salt (c) sunny or shady place
40. 40.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) sand is ground up (d) salt rains down

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