unit review-The Sun

Question 1

what is rotation?

Answer 1

rotation it when a object spins on its own axis

Question 2

what is revolution?

Answer 2

revolution is when a object orbits or revolves around another body

Question 3

how long is earths rotation?

Answer 3

24 hours

Question 4

how long is earths revolution?

Answer 4

365 days

Question 5

what does the heliocentric model mean?

Answer 5

sun is the center is the solar system and planets orbit around it

this one is correct

Question 6

what does the geocentric model mean?

Answer 6

people in the past believe that the sun and planets orbited around the earth

this one is incorrect

Question 7

how does the sun create light and energy?

Answer 7

the sun produces light because it produces energy. the suns energy comes from nuclear fusion reactions at its core

Question 8

what is a black hole?

Answer 8

a black hole is an object whose gravity is so strong that nothing can escape it.

Question 9

what’s is a sunspot?

Answer 9

sunspots are arenas on the suns surface that are darker and cooler than other areas around

Question 10

what is a solar flare?

Answer 10

a solar flare is a huge explosion of gas and charged particles. releases a huge amount of energy and can reach of hundreds of millions of degrees

Question 11

explain how the aurora boreal is occurs

Answer 11

solar winds spiral along the lines of earths magnetic field towards the poles. as the contact the gasses in the atmosphere, the create auroras

Question 12

what colour is a hot star?

Answer 12

blue

Question 13

what colour is a cold star

Answer 13

red