Earth Science Semester 1 Review

Front

What is a galaxy?

Back

A galaxy is a massive system that contains billions of stars, along with gas, dust, and dark matter, all bound together by gravity.

Front

How does the size of a dwarf star compare to a main sequence star?

Back

A main sequence star is larger than a dwarf star.

Front

What phase of the Moon is when it is completely dark and not visible from Earth?

Back

New Moon.

Front

Why does Jupiter have more moons than Earth?

Back

Jupiter has a much greater mass, and therefore a greater gravitational pull, than Earth.

Front

Which planet has the warmest surface temperature?

Back

Mercury.

Front

What is the apparent magnitude of a star?

Back

Apparent magnitude is a measure of how bright a star appears from Earth.

Front

What is luminosity in relation to stars?

Back

Luminosity is the total amount of energy emitted by a star per unit of time, often measured in watts.

Front

What is the difference between a solar system and a galaxy?

Back

A solar system consists of a star and all the objects that orbit it, while a galaxy is a collection of many stars and their solar systems.

Front

What is the significance of the gravitational pull of a planet?

Back

Gravitational pull determines how many moons a planet can hold and influences the orbits of objects around it.

Front

What is a full Moon?

Back

A full Moon occurs when the entire face of the Moon is illuminated by the Sun, making it fully visible from Earth.