Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 186 · 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.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) yeast (c) warm water (d) a piece of string
2. 2.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) salt crystals form (c) it turns to oil (d) it turns to butter
3. 3.⚖️ 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) days to see crystals (c) the kind of salt (d) the same dish
4. 4.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
5. 5.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a piece of string (c) a battery cell (d) a shallow dish
6. 6.🧈 Which of these is a change that cannot be undone? (a) melting ice (b) freezing water (c) dissolving salt (d) browning lemon ink
7. 7.🔍 Which is the odd one out? (a) baking soda (b) chalk powder (c) glucose powder (d) sugar
8. 8.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
9. 9.🧺 Which of these is needed for growing salt crystals? (a) a spoon (b) a magnet (c) yeast (d) a balloon
10. 10.🛟 Where should you keep the crystal dish while it dries? (a) on the edge of a table (b) in a busy doorway (c) next to the baby (d) safe from small children
11. 11.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
12. 12.⚖️ 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 water (b) sunny or shady place (c) days to see crystals
13. 13.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) few or no crystals (c) it turns sweet (d) it fizzes
14. 14.🔍 Which is the odd one out? (a) cooking oil (b) sawdust (c) chalk powder (d) baking soda
15. 15.⚖️ 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) sunny or shady place (c) the same dish (d) the amount of water
16. 16.🔍 Which is the odd one out? (a) sawdust (b) cooking oil (c) glucose powder (d) sand
17. 17.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the amount of water”? (a) we measure it (b) we keep it the same (c) we change it
18. 18.🧂 Does sand dissolve in water? (a) dissolves in water (b) does not dissolve
19. 19.🧂 Which of these does not dissolve in water? (a) food colour (b) glucose powder (c) small pebbles (d) sugar
20. 20.True or false: yeast is needed for growing salt crystals. (a) True (b) False
21. 21.True or false: freezing water is a change that cannot be undone. (a) True (b) False
22. 22.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) warm water (b) salt (c) turmeric powder (d) a piece of string
23. 23.🧺 Which of these is not needed for growing salt crystals? (a) warm water (b) a magnet (c) a spoon (d) salt
24. 24.🧺 Do we need a piece of string for growing salt crystals? (a) needed (b) not needed
25. 25.🧈 Can this change be undone: dissolving salt? (a) can be undone (b) cannot be undone
26. 26.⚖️ 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) the same dish (c) days to see crystals
27. 27.🌊 How is salt made in salt pans by the sea? (a) sand is ground up (b) salt rains down (c) sea water evaporates (d) fish make it
28. 28.⚖️ 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) True (b) False
29. 29.🧂 Does glucose powder dissolve in water? (a) does not dissolve (b) dissolves in water
30. 30.🧂 Which of these dissolves in water? (a) cooking oil (b) small pebbles (c) baking soda (d) sand
31. 31.⚖️ 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 change it (c) we measure it
32. 32.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “the same dish”? (a) we change it (b) we measure it (c) we keep it the same
33. 33.🧺 Which of these is needed for growing salt crystals? (a) turmeric powder (b) a magnet (c) a mirror (d) a piece of string
34. 34.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) salt (c) a battery cell (d) a shallow dish
35. 35.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? What do we do with “sunny or shady place”? (a) we keep it the same (b) we measure it (c) we change it
36. 36.⚖️ 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
37. 37.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) no crystals (b) smaller crystals (c) liquid crystals (d) bigger crystals
38. 38.True or false: baking soda does not dissolve in water. (a) False (b) True
39. 39.🔍 Which is the odd one out? (a) sand (b) sugar (c) glucose powder (d) baking soda
40. 40.True or false: browning lemon ink is a change that can be undone. (a) True (b) False

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