Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 255 · 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 dissolves in water? (a) food colour (b) sawdust (c) sand (d) chalk powder
2. 2.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
3. 3.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) salt (c) a balloon (d) a piece of string
4. 4.🧈 Which of these is a change that cannot be undone? (a) freezing water (b) melting ice (c) milk turning to curd (d) folding paper
5. 5.🧂 Does food colour dissolve in water? (a) does not dissolve (b) dissolves in water
6. 6.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? Which of these is what we measure? (a) days to see crystals (b) the kind of salt (c) the amount of water (d) sunny or shady place
7. 7.🧂 Which of these dissolves in water? (a) sand (b) sawdust (c) chalk powder (d) glucose powder
8. 8.🧂 Which of these does not dissolve in water? (a) sugar (b) cooking oil (c) food colour (d) glucose powder
9. 9.True or false: a battery cell is needed for growing salt crystals. (a) True (b) False
10. 10.⚖️ 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
11. 11.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a piece of string (c) a spoon (d) a mirror
12. 12.🧺 Which of these is not needed for growing salt crystals? (a) a spoon (b) salt (c) a battery cell (d) a shallow dish
13. 13.True or false: baking soda does not dissolve in water. (a) False (b) True
14. 14.True or false: table salt does not dissolve in water. (a) False (b) True
15. 15.🛟 Where should you keep the crystal dish while it dries? (a) safe from small children (b) in a busy doorway (c) next to the baby (d) on the edge of a table
16. 16.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) turmeric powder (c) salt (d) a spoon
17. 17.🧂 Which of these dissolves in water? (a) table salt (b) cooking oil (c) chalk powder (d) sawdust
18. 18.True or false: sugar does not dissolve in water. (a) False (b) True
19. 19.🧂 Does sugar dissolve in water? (a) does not dissolve (b) dissolves in water
20. 20.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) warm water (c) a spoon (d) a magnet
21. 21.True or false: freezing water is a change that can be undone. (a) False (b) True
22. 22.True or false: rusting iron is a change that cannot be undone. (a) False (b) True
23. 23.True or false: cooking oil dissolves in water. (a) False (b) True
24. 24.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a spoon (c) yeast (d) salt
25. 25.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) yeast (c) a piece of string (d) warm water
26. 26.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
27. 27.🛟 Who should pour the warm water for the crystal experiment? (a) a friend who is running (b) the youngest child (c) a grown-up (d) nobody needs to
28. 28.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) salt crystals form (b) it turns to butter (c) it turns to oil (d) sugar crystals form
29. 29.🧂 Does cooking oil dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🧂 Which of these does not dissolve in water? (a) small pebbles (b) baking soda (c) table salt (d) sugar
31. 31.True or false: rusting iron is a change that can be undone. (a) True (b) False
32. 32.🧈 Can this change be undone: folding paper? (a) can be undone (b) cannot be undone
33. 33.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) bigger crystals (c) no crystals (d) liquid crystals
34. 34.🔍 Which is the odd one out? (a) sand (b) table salt (c) sugar (d) glucose powder
35. 35.🧂 Does small pebbles dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) yeast (c) a balloon (d) warm water
37. 37.🧈 Which of these is a change that cannot be undone? (a) rusting iron (b) melting ice (c) freezing water (d) melting butter
38. 38.🌊 How is salt made in salt pans by the sea? (a) salt rains down (b) sea water evaporates (c) sand is ground up (d) fish make it
39. 39.🧈 Can this change be undone: melting butter? (a) can be undone (b) cannot be undone
40. 40.🔍 Which is the odd one out? (a) table salt (b) sugar (c) chalk powder (d) glucose powder

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