Final Exam Review_Units 2and3

Front

Which star is considered a main sequence star?

Back

Vega is a main sequence star.

Front

True or False: The Sun is the biggest star in all of space.

Back

False. The Sun is not the biggest star; there are larger stars in the universe.

Front

Velocity is speed with.....

Back

Direction. Velocity is defined as speed in a specific direction.

Front

Which of these stars is hottest? Red Star, Yellow Star, Orange Star, Blue Star.

Back

Blue Star is the hottest among these.

Front

What is the formula to calculate speed?

Back

Speed = Distance / Time.

Front

If Adam drives 500 km in 3 hours, what is his speed?

Back

166.7 km/hr.

Front

What is a main sequence star?

Back

A main sequence star is a star that is in the stable phase of its lifecycle, fusing hydrogen into helium in its core.

Front

What is the difference between speed and velocity?

Back

Speed is a scalar quantity (magnitude only), while velocity is a vector quantity (magnitude and direction).

Front

What color of star indicates the highest temperature?

Back

Blue stars indicate the highest temperature.

Front

What is the approximate distance light travels in one year?

Back

One light year is approximately 9.46 trillion kilometers.