Solar System and Earths Unique Features

A leap year happens every how many years?

How many characteristics of the Earth are necessary for life to exist? What are these?

About how long does one of Earth's revolutions around the Sun take?

Aside from Earth, what other planets are included in habitable zone?

Of the known planets in our solar system, which characteristic is unique to the planet Earth?

The tilt of Earth affects living organisms. What is directly affected by Earth's tilt?

The Earth's axial tilt is responsible for changing our seasons. In what degree was the earth tilted?

Our planet Earth is slightly flattened at the poles and bulgy at the equator. What is the shape of our Earth?

Which is the most responsible for Earth's surface temperatures?

Which of the following is most necessary for life to develop on another planet?

Which is a reason life in the outer planets (like Jupiter) is less likely than life on planets nearer the Sun?

Life is more likely to be found on a planet whose atmosphere contains abundant

After four seasons have passed on Earth, which has happened?

Which helps keep our Moon in its orbit?