Earth and Space Science

Front

What is the law of superposition?

Back

The law of superposition states that in undisturbed sedimentary rock layers, the oldest layers are at the bottom and the youngest layers are at the top.

Front

What is a coastline?

Back

A coastline is a place where land meets an ocean.

Front

What process occurs when melted rock cools and hardens?

Back

The process of cooling and hardening of melted rock is called solidification.

Front

What are terrestrial planets?

Back

Terrestrial planets are small, rocky planets that are closer to the sun, including Mercury, Venus, Earth, and Mars.

Front

What is absolute brightness in stars?

Back

Absolute brightness is the measure of a star's intrinsic brightness, or how bright it would appear at a standard distance of 10 parsecs.

Front

What is the difference between a planet and a star?

Back

A planet is a celestial body that orbits a star and does not produce its own light, while a star is a massive celestial body that generates light and heat through nuclear fusion.

Front

What is the solar system?

Back

The solar system is a collection of celestial bodies, including the sun, planets, moons, asteroids, comets, and meteoroids, that are bound by gravity.

Front

What are the characteristics of gas giants?

Back

Gas giants are large planets that are primarily composed of hydrogen and helium, have thick atmospheres, and lack a solid surface.

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, water, and ice.

Front

What is the rock cycle?

Back

The rock cycle is the continuous process of rock formation, breakdown, and reformation through processes such as melting, cooling, erosion, and sedimentation.