Earth and Space Science Review Flashcard

Front

Which scientist proposed that planets orbit the Sun?

Back

Copernicus

Front

What type of system is Earth considered to be?

Back

Closed system

Front

How many Earth days does it take Venus to rotate once on its axis?

Back

243 days

Front

What is 15,000,000 in standard form?

Back

1.5 x 10^7

Front

Which type of system exchanges energy but not matter with its surroundings?

Back

Closed system

Front

What is the definition of a planet?

Back

A celestial body that orbits a star, is spherical in shape, and has cleared its orbit of other debris.

Front

What is the difference between an open and closed system?

Back

An open system exchanges both energy and matter with its surroundings, while a closed system exchanges only energy.

Front

What is the significance of the Earth's tilt?

Back

The tilt of the Earth (about 23.5 degrees) is responsible for the changing seasons.

Front

What is the main component of the Earth's atmosphere?

Back

Nitrogen (about 78%) and Oxygen (about 21%).

Front

What causes day and night on Earth?

Back

The rotation of the Earth on its axis.