Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 799 · 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.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to oil (c) salt crystals form (d) it turns to butter
2. 2.True or false: yeast is not needed for growing salt crystals. (a) False (b) True
3. 3.True or false: table salt does not dissolve in water. (a) False (b) True
4. 4.True or false: warm water is not needed for growing salt crystals. (a) True (b) False
5. 5.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
6. 6.🛟 Who should pour the warm water for the crystal experiment? (a) a grown-up (b) the youngest child (c) nobody needs to (d) a friend who is running
7. 7.True or false: dissolving salt is a change that can be undone. (a) False (b) True
8. 8.🧺 Do we need yeast for growing salt crystals? (a) not needed (b) needed
9. 9.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve
10. 10.🧈 Can this change be undone: folding paper? (a) cannot be undone (b) can be undone
11. 11.🧈 Which of these is a change that cannot be undone? (a) melting butter (b) freezing water (c) milk turning to curd (d) melting ice
12. 12.⚖️ 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 change it (b) we measure it (c) we keep it the same
13. 13.⚖️ 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) days to see crystals (b) the amount of water (c) sunny or shady place (d) the same dish
14. 14.⚖️ 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
15. 15.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
16. 16.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) liquid crystals (c) bigger crystals (d) no crystals
17. 17.⚖️ 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 same dish (b) sunny or shady place (c) the amount of water (d) days to see crystals
18. 18.🛟 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
19. 19.⚖️ 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
20. 20.🧺 Do we need a balloon for growing salt crystals? (a) needed (b) not needed
21. 21.⚖️ 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
22. 22.True or false: a shallow dish is needed for growing salt crystals. (a) False (b) True
23. 23.⚖️ 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
24. 24.🧂 Why do we stir in salt until no more will dissolve? (a) to change its colour (b) to cool the water (c) to make it fizz (d) to make it very salty
25. 25.True or false: glucose powder does not dissolve in water. (a) False (b) True
26. 26.🔮 Predict: you cover the dish so no water can escape. What happens? (a) few or no crystals (b) it fizzes (c) crystals grow faster (d) it turns sweet
27. 27.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a shallow dish (d) a balloon
28. 28.🧈 Can this change be undone: cooking an egg? (a) cannot be undone (b) can be undone
29. 29.🧂 Which of these does not dissolve in water? (a) small pebbles (b) sugar (c) baking soda (d) glucose powder
30. 30.🧺 Which of these is needed for growing salt crystals? (a) a battery cell (b) a mirror (c) a balloon (d) salt
31. 31.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
32. 32.🧂 Why do crystals appear as the dish dries? (a) salt eats water (b) water evaporates (c) the dish melts (d) salt grows roots
33. 33.🧂 Which of these dissolves in water? (a) small pebbles (b) chalk powder (c) sand (d) baking soda
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) a shallow dish (c) a spoon (d) a battery cell
35. 35.🧂 Which of these dissolves in water? (a) sand (b) small pebbles (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) sugar (b) sawdust (c) food colour (d) baking soda
38. 38.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) fish make it (c) salt rains down (d) sand is ground up
39. 39.🧺 Do we need a magnet for growing salt crystals? (a) not needed (b) needed
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 keep it the same (b) we measure it (c) we change it

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