topic 7 - astronomy

Question 1

newton’s FIRSt LAw

Answer 1

an object traveling at a certain velocity will continue to travel at that velocity unless acted upon by a resultant force

Question 2

during orbit what quality is always changing meaning velocity is also changing

Answer 2

direction

Question 3

does an orbiting object accelerate

Answer 3

yes, it is orbititing because the velocity is changing

Question 4

if an employee hectic moved close to earth, what is required for the object to stay in orbit

Answer 4

magnitude of the velocity must increase

Question 5

what provides evidence of the BIG BANG

Answer 5

red shift

Question 6

what is redshift

Answer 6

the wavelength is stretched/shifted towards the red end of the spectrum

Question 7

explain why galaxies are moving away from each other

Answer 7

space and the universe is expanding making galaxies move further apart

Question 8

what is the basic idea of the big bang theory

Answer 8

the universe expanded from a single tiny point of high density and pressure