Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 435 · 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.⚖️ 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 amount of water
2. 2.🧂 Which of these does not dissolve in water? (a) baking soda (b) table salt (c) food colour (d) chalk powder
3. 3.True or false: turmeric powder is not needed for growing salt crystals. (a) False (b) True
4. 4.🧺 Which of these is needed for growing salt crystals? (a) warm water (b) turmeric powder (c) a battery cell (d) a magnet
5. 5.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
6. 6.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) yeast (d) salt
7. 7.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) liquid crystals (b) bigger crystals (c) no crystals (d) smaller crystals
8. 8.🧈 Can this change be undone: baking a cake? (a) can be undone (b) cannot be undone
9. 9.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
10. 10.🧈 Which of these is a change that can be undone? (a) freezing water (b) browning lemon ink (c) rusting iron (d) cooking an egg
11. 11.🧂 Which of these dissolves in water? (a) sand (b) sugar (c) small pebbles (d) sawdust
12. 12.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) glucose powder (d) table salt
13. 13.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
14. 14.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) on the edge of a table (c) in a busy doorway (d) safe from small children
16. 16.True or false: a piece of string is not needed for growing salt crystals. (a) False (b) True
17. 17.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) it turns to oil (b) salt crystals form (c) it turns to butter (d) sugar crystals form
18. 18.🧂 Does table salt dissolve in water? (a) does not dissolve (b) dissolves in water
19. 19.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) warm water (c) a shallow dish (d) a balloon
20. 20.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
21. 21.🛟 Who should pour the warm water for the crystal experiment? (a) the youngest child (b) a grown-up (c) a friend who is running (d) nobody needs to
22. 22.🧺 Which of these is needed for growing salt crystals? (a) a balloon (b) a piece of string (c) a mirror (d) a magnet
23. 23.True or false: freezing water is a change that cannot be undone. (a) False (b) True
24. 24.🧈 Can this change be undone: rusting iron? (a) can be undone (b) cannot be undone
25. 25.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) the dish melts (c) salt grows roots (d) water evaporates
26. 26.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
27. 27.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) dissolving salt (c) milk turning to curd (d) folding paper
28. 28.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is kept the same. (a) True (b) False
29. 29.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a battery cell (c) a piece of string (d) warm water
31. 31.⚖️ 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 change it (b) we keep it the same (c) we measure it
32. 32.🌊 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
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a piece of string (c) turmeric powder (d) salt
34. 34.🧈 Which of these is a change that can be undone? (a) rusting iron (b) cooking an egg (c) baking a cake (d) melting butter
35. 35.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a mirror (b) a shallow dish (c) salt (d) warm water
36. 36.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) crystals grow faster (c) it fizzes (d) few or no crystals
37. 37.🔍 Which is the odd one out? (a) small pebbles (b) sugar (c) sawdust (d) cooking oil
38. 38.🧺 Do we need a spoon for growing salt crystals? (a) needed (b) not needed
39. 39.True or false: a shallow dish is not needed for growing salt crystals. (a) False (b) True
40. 40.⚖️ 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 measure it (b) we change it (c) we keep it the same

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