Earth Benchmark Review

Front

What is a Main Sequence Star?

Back

A Main Sequence Star is a star that is in the stable phase of its life cycle, where it fuses hydrogen into helium in its core. This is the stage where stars spend most of their lifetime.

Front

What is the order of the inner planets from closest to the Sun?

Back

Mercury, Venus, Earth, Mars.

Front

How do you calculate density?

Back

Density is calculated by dividing mass by volume (Density = Mass/Volume).

Front

What is a Galaxy?

Back

A Galaxy is a massive system that contains millions of stars, their solar systems, gas, dust, and dark matter, all held together by gravity.

Front

What process forms metamorphic rocks?

Back

Metamorphic rocks are formed through heat and pressure applied to existing rocks.

Front

What is a Red Giant?

Back

A Red Giant is a late stage in the life cycle of a star, characterized by a large size and a reddish color, occurring after the star has exhausted its hydrogen fuel.

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, including planets, moons, and asteroids, while a Galaxy is a vast collection of many solar systems, stars, and other celestial bodies.

Front

What is the significance of the Sun in our Solar System?

Back

The Sun is the central star of our Solar System, providing the necessary light and heat to support life on Earth and influencing the orbits of all the planets.

Front

What is the role of gravity in the formation of celestial bodies?

Back

Gravity is the force that pulls matter together, leading to the formation of stars, planets, and galaxies by attracting gas and dust.

Front

What is erosion?

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by natural forces such as wind or water.