Salt Crystal Experiment Worksheet

Science experiments lesson 18: Growing salt crystals · Set 647 · 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 “the amount of water”? (a) we keep it the same (b) we measure it (c) we change it
2. 2.🧂 Does sand dissolve in water? (a) does not dissolve (b) dissolves in water
3. 3.🧂 Does food colour dissolve in water? (a) dissolves in water (b) does not dissolve
4. 4.🧺 Which of these is needed for growing salt crystals? (a) a magnet (b) turmeric powder (c) a balloon (d) a spoon
5. 5.🧈 Which of these is a change that can be undone? (a) cooking an egg (b) browning lemon ink (c) milk turning to curd (d) folding paper
6. 6.True or false: food colour does not dissolve in water. (a) True (b) False
7. 7.🔮 Predict: you use sugar instead of salt. What happens as it dries? (a) sugar crystals form (b) it turns to butter (c) it turns to oil (d) salt crystals form
8. 8.True or false: turmeric powder is needed for growing salt crystals. (a) True (b) False
9. 9.🔮 Predict: you cover the dish so no water can escape. What happens? (a) it turns sweet (b) few or no crystals (c) crystals grow faster (d) it fizzes
10. 10.True or false: freezing water is a change that can be undone. (a) False (b) True
11. 11.True or false: food colour dissolves in water. (a) False (b) True
12. 12.🧂 What shape are table salt crystals under a magnifying glass? (a) tiny cubes (b) tiny spheres (c) tiny triangles (d) tiny stars
13. 13.⚖️ 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) False (b) True
14. 14.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of salt is kept the same. (a) False (b) True
15. 15.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: the amount of water is the one thing we change. (a) True (b) False
16. 16.True or false: a battery cell is not needed for growing salt crystals. (a) False (b) True
17. 17.🛟 Where should you keep the crystal dish while it dries? (a) next to the baby (b) safe from small children (c) in a busy doorway (d) on the edge of a table
18. 18.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is kept the same. (a) False (b) True
19. 19.⚖️ 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 same dish (c) sunny or shady place (d) the amount of water
20. 20.🧂 Which of these does not dissolve in water? (a) cooking oil (b) baking soda (c) glucose powder (d) sugar
21. 21.🧺 Do we need a shallow dish for growing salt crystals? (a) not needed (b) needed
22. 22.🧂 Does baking soda dissolve in water? (a) does not dissolve (b) dissolves in water
23. 23.🧈 Can this change be undone: freezing water? (a) can be undone (b) cannot be undone
24. 24.⚖️ 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 measure it (b) we keep it the same (c) we change it
25. 25.🧈 Can this change be undone: melting butter? (a) cannot be undone (b) can be undone
26. 26.🔍 Which is the odd one out? (a) sawdust (b) sand (c) chalk powder (d) table salt
27. 27.🔍 Which is the odd one out? (a) sand (b) sawdust (c) food colour (d) cooking oil
28. 28.True or false: a piece of string is not needed for growing salt crystals. (a) True (b) False
29. 29.🔮 Predict: crystals grow slowly where nobody disturbs them. How big are they? (a) bigger crystals (b) no crystals (c) smaller crystals (d) liquid crystals
30. 30.True or false: small pebbles does not dissolve in water. (a) False (b) True
31. 31.True or false: melting butter is a change that cannot be undone. (a) True (b) False
32. 32.🧺 Which of these is not needed for growing salt crystals? (a) a piece of string (b) a shallow dish (c) a balloon (d) salt
33. 33.🔍 Which is the odd one out? (a) chalk powder (b) sand (c) sawdust (d) sugar
34. 34.True or false: baking soda dissolves in water. (a) False (b) True
35. 35.🧂 Does chalk powder dissolve in water? (a) does not dissolve (b) dissolves in water
36. 36.🧺 Three of these are needed for growing salt crystals. Which one is NOT needed? (a) salt (b) warm water (c) a battery cell (d) a piece of string
37. 37.🛟 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
38. 38.⚖️ 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
39. 39.🧺 Do we need a magnet for growing salt crystals? (a) needed (b) not needed
40. 40.⚖️ Fair test — do salt crystals form faster on a sunny windowsill or in a shady cupboard? True or false: sunny or shady place is what we measure. (a) True (b) False

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids