1. Answer: You notice that your grandmother's silver is very dark in places and needs polish: Chemical Change.
Your cup of hot chocolate gives off steam: Chemical Change
When you mix baking soda and vinegar, the two substances fizz and produce bubbles: Chemical change
An ice cube melts: Physical change
You burn an oak log in a fireplace: Chemical change
You activate a heat pack to warm your hands: Chemical change.
2. Answer: 0.96kg
Sorry
didn't have enough time to finish the whole thing.