Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 417 · 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.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
2. 2.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) a balloon (c) a shallow dish (d) salt
3. 3.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) in a busy doorway (c) safe from small children (d) on the edge of a table
4. 4.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a piece of string (d) a battery cell
5. 5.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
6. 6.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to butter (b) salt crystals form (c) it turns to oil (d) sugar crystals form
7. 7.True or false: turmeric powder is not needed for growing salt crystals. (a) True (b) False
8. 8.🔍 Which is the odd one out? (a) glucose powder (b) food colour (c) table salt (d) sand
9. 9.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
10. 10.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) saturated (d) empty
11. 11.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) it turns sweet (d) crystals grow faster
12. 12.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the kind of salt is what we measure. (a) False (b) True
13. 13.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sand is ground up (c) fish make it (d) sea water evaporates
14. 14.🔍 Which is the odd one out? (a) chalk powder (b) small pebbles (c) sawdust (d) baking soda
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is the one thing we change. (a) False (b) True
16. 16.🧈 Which of these is a change that cannot be undone? (a) folding paper (b) milk turning to curd (c) melting ice (d) dissolving salt
17. 17.🔍 Which is the odd one out? (a) sugar (b) glucose powder (c) small pebbles (d) table salt
18. 18.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
19. 19.True or false: milk turning to curd is a change that can be undone. (a) False (b) True
20. 20.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) bigger crystals (d) liquid crystals
21. 21.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) a balloon (d) salt
22. 22.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) salt (c) turmeric powder (d) a spoon
24. 24.⚖️ 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) days to see crystals (d) the amount of salt
25. 25.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
26. 26.🧂 Which of these dissolves in water? (a) sand (b) chalk powder (c) cooking oil (d) glucose powder
27. 27.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (c) cooking oil (d) food colour
28. 28.True or false: salt is not needed for growing salt crystals. (a) True (b) False
29. 29.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
30. 30.🧂 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) baking soda (d) food colour
31. 31.🧂 Does chalk powder dissolve in water? (a) dissolves in water (b) does not dissolve
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) sunny or shady place (b) the amount of water (c) days to see crystals (d) the same dish
33. 33.🧈 Which of these is a change that cannot be undone? (a) browning lemon ink (b) folding paper (c) melting butter (d) dissolving salt
34. 34.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
35. 35.🔍 Which is the odd one out? (a) baking soda (b) sugar (c) chalk powder (d) glucose powder
36. 36.⚖️ 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
37. 37.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) sugar (d) cooking oil
38. 38.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a spoon (d) a battery cell
39. 39.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) water evaporates (d) salt grows roots
40. 40.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed

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