Question

1. what change would affect earths orbit? (1 point) a total eclipse of the sun. a newly formed comet revolving around the sun. an increase in sea level on earth. a change in the suns pull of gravity.

Explanation:

• A total eclipse of the sun is a temporary alignment of the Moon between the Earth and the Sun and does not affect the Earth's orbit.
• A newly - formed comet revolving around the Sun has a negligible mass compared to the Sun and Earth, so it won't affect Earth's orbit.
• An increase in sea level on Earth is a local - to - global (but still on - Earth) change in the distribution of mass on Earth. Since the total mass of the Earth (ocean + land + atmosphere etc.) remains approximately the same (mass is just redistributed), it has a negligible effect on Earth's orbit around the Sun.
• According to Newton's law of gravitation \(F = G\frac{Mm}{r^{2}}\), where \(F\) is the gravitational force, \(G\) is the gravitational constant, \(M\) is the mass of the Sun, \(m\) is the mass of the Earth, and \(r\) is the distance between the Sun and the Earth. The gravitational pull of the Sun on the Earth is what keeps the Earth in its orbit. If the Sun's pull of gravity (\(F\)) changes (for example, if the mass of the Sun \(M\) changes), the centripetal force required for the Earth's orbital motion (\(F_{c}=m\frac{v^{2}}{r}\), where \(v\) is the orbital velocity and \(r\) is the orbital radius) will be affected, and thus the Earth's orbit will change.

Answer:

A change in the sun's pull of gravity.