You have no answers down for me to help but here is the answer Synapse
jot down the answers next time lol
Answer:
Characteristics used to classify stars include color, temperature, size, composition, and brightness.
I have solved part of it 2. is constantly 6.compass and part of number 3.is sun
Answer:
a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change.
"chlorine acts as a catalyst promoting the breakdown of ozone"
a person or thing that precipitates an event.
"the governor's speech acted as a catalyst for debate"
Explanation:
hope its help
