Chemistry of Combustion

Question 1

Physical change is..

Answer 1

• Molecules are moved around
• No change to atoms or molecules

Question 2

A chemical change is..

Answer 2

• atoms rearranged
  -molecules formed or broken
• no change to atoms

Question 3

Nuclear change is..

Answer 3

• atoms changed from one element to another

Question 4

What happens when you burn a 100lb candle

Answer 4

the candle remains in the air as heat, burned for a while as light … but that 100lbs is now chemically changed to form with new molecules

Question 5

Methane formula

Answer 5

CH4

Question 6

explain where plants get raw materials for growing

Answer 6

• lots of water & small amounts of minerals from soil and the air

Question 7

explain where plants get their raw material.

Answer 7

mainly from air