Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 488 · 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? What do we do with “days to see crystals”? (a) we measure it (b) we change it (c) we keep it the same
2. 2.🔮 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
3. 3.⚖️ 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
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) a piece of string (c) a battery cell (d) a mirror
5. 5.⚖️ 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
6. 6.🧈 Can this change be undone: cooking an egg? (a) can be undone (b) cannot be undone
7. 7.🧂 Which of these dissolves in water? (a) chalk powder (b) cooking oil (c) sawdust (d) sugar
8. 8.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the same dish is the one thing we change. (a) True (b) False
9. 9.🧂 Which of these dissolves in water? (a) sawdust (b) small pebbles (c) cooking oil (d) baking soda
10. 10.True or false: a magnet is needed for growing salt crystals. (a) True (b) False
11. 11.🔍 Which is the odd one out? (a) small pebbles (b) sawdust (c) sand (d) glucose powder
12. 12.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a balloon (b) a piece of string (c) salt (d) a shallow dish
13. 13.🧺 Do we need a battery cell for growing salt crystals? (a) not needed (b) needed
14. 14.🧈 Which of these is a change that can be undone? (a) browning lemon ink (b) baking a cake (c) cooking an egg (d) folding paper
15. 15.⚖️ 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) the amount of water (b) sunny or shady place (c) days to see crystals (d) the same dish
16. 16.🛟 Who should pour the warm water for the crystal experiment? (a) nobody needs to (b) a friend who is running (c) a grown-up (d) the youngest child
17. 17.🌊 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
18. 18.🧈 Can this change be undone: melting ice? (a) can be undone (b) cannot be undone
19. 19.🧺 Do we need turmeric powder for growing salt crystals? (a) not needed (b) needed
20. 20.⚖️ 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 change it (b) we measure it (c) we keep it the same
21. 21.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny spheres (b) tiny stars (c) tiny cubes (d) tiny triangles
22. 22.🧂 Does baking soda dissolve in water? (a) dissolves in water (b) does not dissolve
23. 23.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a spoon (b) a mirror (c) a piece of string (d) salt
24. 24.🧂 Why do crystals appear as the dish dries? (a) the dish melts (b) water evaporates (c) salt grows roots (d) salt eats water
25. 25.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) warm water (c) a spoon (d) a mirror
26. 26.⚖️ 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) False (b) True
27. 27.True or false: a battery cell is not needed for growing salt crystals. (a) True (b) False
28. 28.🧺 Do we need salt for growing salt crystals? (a) not needed (b) needed
29. 29.🧈 Which of these is a change that can be undone? (a) melting ice (b) milk turning to curd (c) rusting iron (d) cooking an egg
30. 30.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a shallow dish (b) a spoon (c) a battery cell (d) salt
31. 31.🔍 Which is the odd one out? (a) sawdust (b) small pebbles (c) cooking oil (d) sugar
32. 32.🧂 Which of these does not dissolve in water? (a) sand (b) sugar (c) food colour (d) baking soda
33. 33.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
34. 34.🛟 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
35. 35.🔮 Predict: you cover the dish so no water can escape. What happens? (a) crystals grow faster (b) it turns sweet (c) few or no crystals (d) it fizzes
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) a piece of string (b) yeast (c) a shallow dish (d) salt
37. 37.🧺 Which of these is not needed for growing salt crystals? (a) salt (b) a spoon (c) a shallow dish (d) yeast
38. 38.True or false: a spoon is needed for growing salt crystals. (a) True (b) False
39. 39.⚖️ 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 measure it (c) we change it
40. 40.🧂 Does glucose powder dissolve in water? (a) dissolves in water (b) does not dissolve

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