The Inner Planets

Front

What are the Inner Planets?

Back

The Inner Planets are the four planets closest to the Sun: Mercury, Venus, Earth, and Mars. They are also known as terrestrial planets because they have solid, rocky surfaces.

Front

Which planet is closest to the Sun?

Back

Mercury is the closest planet to the Sun.

Front

What is the average temperature of Venus?

Back

Venus has the highest average temperature of all the planets in our solar system, around 467 degrees Celsius (872 degrees Fahrenheit).

Front

Why are the Inner Planets warmer than the Outer Planets?

Back

The Inner Planets are warmer because they are closer to the Sun, which provides more heat and light.

Front

What is the surface of Mars like?

Back

Mars has a rocky surface with canyons, volcanoes, and polar ice caps.

Front

Which Inner Planet has the most water?

Back

Earth is the Inner Planet with the most water, covering about 71% of its surface.

Front

What is a year on Mercury?

Back

A year on Mercury (the time it takes to orbit the Sun) is about 88 Earth days.

Front

What is unique about Venus's rotation?

Back

Venus rotates very slowly on its axis, taking about 243 Earth days to complete one rotation, which is longer than its year.

Front

What are the main components of the atmosphere of Venus?

Back

The atmosphere of Venus is mostly carbon dioxide, with clouds of sulfuric acid.

Front

How do the sizes of the Inner Planets compare?

Back

Earth is the largest of the Inner Planets, followed by Venus, Mars, and then Mercury.