Astronomy- Earth Science

Front

Kepler's first law states that the orbits of the planets are in the shape of a/an...

Back

ellipse

Answer explanation

Kepler's first law states that the orbits of the planets are elliptical, not circular or spiral. This means that planets move in elongated circles, with the sun at one of the foci of the ellipse.

Front

What is the biggest difference between the Geocentric Model and the Heliocentric Model?

Back

the center of the solar system

Answer explanation

The biggest difference between the Geocentric Model and the Heliocentric Model is the center of the solar system. The Geocentric Model places Earth at the center, while the Heliocentric Model places the Sun at the center.

Front

What does the Big Bang Theory explain?

Back

How our universe began

Answer explanation

The Big Bang Theory primarily addresses how our universe began, explaining its origin and the subsequent expansion, rather than the formation of planets, the sun's processes, or the speed of light.

Front

The planets in our solar system orbit in an ellipse with the ______ at one of the two foci.

Back

Sun

Answer explanation

The planets in our solar system orbit in an ellipse with the Sun at one of the two foci. This is a fundamental principle of celestial mechanics, where the Sun's gravitational pull keeps the planets in their elliptical orbits.

Front

The place where a planet is closest to the Sun as it orbits the Sun is called the

Back

perihelion

Answer explanation

The closest point of a planet's orbit to the Sun is called perihelion. In contrast, aphelion refers to the farthest point. Therefore, the correct answer is perihelion.

Front

The place where a planet is farthest away from the Sun in its orbit around the Sun is called the

Back

aphelion

Answer explanation

The point in a planet's orbit where it is farthest from the Sun is called aphelion. In contrast, perihelion refers to the closest point to the Sun. Therefore, the correct answer is aphelion.

Front

A planet moves __________ when it is farthest from the sun.

Back

slower

Answer explanation

A planet moves slower when it is farthest from the sun due to Kepler's laws of planetary motion. Specifically, it travels at its slowest speed at aphelion, the point in its orbit farthest from the sun.

Front

When do planets move the fastest?

Back

Close to the sun

Answer explanation

Planets move fastest when they are close to the sun due to the stronger gravitational pull. This is described by Kepler's laws of planetary motion, which state that a planet's speed increases as it approaches the sun.

Front

The shape of the Earth is not a perfect sphere it is rather a(n)

Back

Oblate Spheroid

Answer explanation

The Earth is not a perfect sphere; it is an oblate spheroid, meaning it is slightly flattened at the poles and bulging at the equator due to its rotation. This distinguishes it from a perfect sphere or other shapes.

Front

Spinning of the Earth on its axis is called...

Back

rotation

Answer explanation

The spinning of the Earth on its axis is known as rotation. This term specifically refers to the movement of the Earth around its own axis, distinguishing it from revolution, which refers to the Earth's orbit around the Sun.