7.9 practice

Front

What is the closest point in a comet's orbit to the sun called?

Back

Perihelion.

Front

Why is the presence of liquid water on Mars significant for scientists?

Back

It suggests the possibility of life, as life has only been found where there is water.

Front

What characteristic of Mars supports the possibility of life?

Back

The presence of water molecules on Mars' surface.

Front

How does the atmosphere protect life on Earth?

Back

By blocking out dangerous rays from the Sun.

Front

What is a common misconception about the rotation of planets in our solar system?

Back

Not all planets rotate in the same direction.

Front

What is the shape of the orbits of planets in our solar system?

Back

Ellipses.

Front

What is the term for the path a planet takes around the sun?

Back

Orbit.

Front

What gas is primarily found in the atmosphere of Mars?

Back

Carbon Dioxide (CO2).

Front

What is the significance of the tilt of Mars' axis?

Back

It causes seasons similar to those on Earth.

Front

What is the main reason life on Earth is dependent on the atmosphere?

Back

It provides oxygen needed for respiration.