Part A Unit 2 Exam

Front

A planet that is ________ from the sun will take _________ to complete an orbit.

Back

Farther ; longer

Front

What is the approximate age of when the Sun and Earth formed, along with the rest of the solar system?

Back

4.6 billion years ago

Front

Earth eventually separated into its core and these two additional layers.

Back

crust and mantle

Front

What are the two reference points that help in drawing the ellipse? Foci, polka dots, ellipticals, reference points

Back

Foci

Front

1.5 billion years ago, the chemical composition of the atmosphere is ______________ to what it is today.

Back

similar

Front

Scientists believe this is one possible reason why the 1st atmosphere was lost: core, solar nebula, nuclear fusion, solar wind.

Back

solar wind

Front

According to Kepler’s 1st Law, the shape of a planetary orbit is called ___________.

Back

an ellipse

Front

On which side of this orbit is the moon travelling at the highest velocity (speed)? Options: Left, Right, Top, Bottom

Back

Left

Front

Each planet revolves around the sun with equal area in equal time.

Back

Kepler's 2nd Law

Front

When did Earth's oceans begin to form?

Back

3.5 billion years ago