Unit 3 Astronomy Regents Earth Science

Front

What is the closest distance Mars reaches to Earth approximately every?

Back

16 years

Front

What primarily causes differences in Earth's orbital velocity around the Sun?

Back

Distance between Earth and the Sun

Front

What is the relationship between temperature and luminosity of main sequence stars?

Back

As temperature increases, luminosity increases.

Front

What are the heavier elements found in Earth's core?

Back

Iron and nickel

Front

What is Earth's eccentricity?

Back

0.017

Front

Define eccentricity in the context of an orbit.

Back

Eccentricity measures the deviation of an orbit from being circular.

Front

What is the average distance from the Earth to the Sun?

Back

Approximately 93 million miles (150 million kilometers).

Front

What is the significance of the axial tilt of Earth?

Back

It causes the seasons on Earth.

Front

What is the main component of the Sun's composition?

Back

Hydrogen, making up about 74% of its mass.

Front

What is the difference between a planet and a dwarf planet?

Back

A planet clears its orbit of other debris, while a dwarf planet does not.