Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 878 · 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) it turns to butter (d) salt crystals form
2. 2.🧈 Can this change be undone: browning lemon ink? (a) can be undone (b) cannot be undone
3. 3.⚖️ 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 amount of water (b) days to see crystals (c) the kind of salt (d) the same dish
4. 4.⚖️ 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) True (b) False
5. 5.🧺 Do we need a mirror for growing salt crystals? (a) not needed (b) needed
6. 6.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) smaller crystals (b) no crystals (c) liquid crystals (d) bigger crystals
7. 7.True or false: milk turning to curd is a change that can be undone. (a) True (b) False
8. 8.True or false: food colour dissolves in water. (a) False (b) True
9. 9.True or false: baking soda dissolves in water. (a) False (b) True
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) in a busy doorway (b) on the edge of a table (c) next to the baby (d) safe from small children
11. 11.🧂 Which of these does not dissolve in water? (a) chalk powder (b) baking soda (c) sugar (d) table salt
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a magnet (d) a shallow dish
13. 13.🧺 Which of these is not needed for growing salt crystals? (a) a balloon (b) a shallow dish (c) a spoon (d) salt
14. 14.🧈 Can this change be undone: freezing water? (a) cannot be undone (b) can be undone
15. 15.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
16. 16.True or false: warm water is not needed for growing salt crystals. (a) False (b) True
17. 17.⚖️ 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 amount of salt (b) days to see crystals (c) sunny or shady place
18. 18.🧈 Can this change be undone: melting ice? (a) cannot be undone (b) can be undone
19. 19.True or false: warm water is needed for growing salt crystals. (a) False (b) True
20. 20.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: days to see crystals is what we measure. (a) True (b) False
21. 21.🧂 Does sugar dissolve in water? (a) dissolves in water (b) does not dissolve
22. 22.True or false: baking soda does not dissolve in water. (a) True (b) False
23. 23.⚖️ 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
24. 24.📘 What do we call a solution that cannot dissolve any more salt? (a) magnetic (b) frozen (c) empty (d) saturated
25. 25.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
26. 26.🧈 Which of these is a change that can be undone? (a) freezing water (b) baking a cake (c) browning lemon ink (d) milk turning to curd
27. 27.True or false: salt is needed for growing salt crystals. (a) True (b) False
28. 28.⚖️ 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
29. 29.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) warm water (c) a piece of string (d) a battery cell
30. 30.🧺 Do we need warm water for growing salt crystals? (a) not needed (b) needed
31. 31.True or false: turmeric powder is needed for growing salt crystals. (a) False (b) True
32. 32.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) salt (c) warm water (d) a mirror
33. 33.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) a spoon (c) yeast (d) salt
34. 34.🧂 Why do we stir in salt until no more will dissolve? (a) to cool the water (b) to make it very salty (c) to make it fizz (d) to change its colour
35. 35.🌊 How is salt made in salt pans by the sea? (a) sea water evaporates (b) sand is ground up (c) salt rains down (d) fish make it
36. 36.🧺 Which of these is needed for growing salt crystals? (a) a mirror (b) a magnet (c) a balloon (d) salt
37. 37.🔍 Which is the odd one out? (a) cooking oil (b) sand (c) sugar (d) sawdust
38. 38.🛟 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
39. 39.🧂 Which of these dissolves in water? (a) food colour (b) chalk powder (c) small pebbles (d) cooking oil
40. 40.🔍 Which is the odd one out? (a) small pebbles (b) table salt (c) baking soda (d) sugar

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