Astronomy 2 Study Guide

The diagram of day and night using the Sun and the Earth shows the position of the Earth relative to the Sun. Which part of the Earth is experiencing night?

• The side facing the Sun

• The side facing away from the Sun

• The top half of the Earth

• The bottom half of the Earth

Earth has day and night because:

• it rotates on its axis.

• it revolves around the Sun.

• it is flat.

• it is stationary.

Illustrate and name the shape of an object's orbit around the Sun.

• Circle

• Ellipse

• Parabola

• Hyperbola

How long does it take for the Moon to complete one cycle of all 8 phases?

• About a month

• 4 weeks

• 29.5 days

Which diagram correctly shows the Earth revolving around the Sun with each season labeled in both hemispheres?

• Diagram A

• Diagram B

• Diagram C

• Diagram D

Which of the following are reasons the Earth has seasons?

• The tilt of Earth's axis

• The angle of the Sun's rays

• The number of daylight hours

• All of the above

The Earth's axis is defined by its tilt. What is the degree of Earth's tilt? How would life on Earth be different if Earth's axis were not tilted?

• 23.5 degrees

• 0 degrees

• 45 degrees

• 90 degrees

Explain why the Earth has tides. Gravitational pull of the sun & the moon.

• The Earth has tides due to the gravitational pull of the sun and the moon.

• The Earth has tides due to the rotation of the Earth.

• The Earth has tides due to the wind patterns.

• The Earth has tides due to the Earth's magnetic field.

Which of the following drawings correctly represents the Moon’s phases as seen from Earth, including the Sun and Earth?

• A drawing with the Moon phases in the correct order, including the Sun and Earth.

• A drawing with random celestial bodies not related to the Moon phases.

• A drawing with only the Sun and Earth, without the Moon phases.

• A drawing with the Moon phases but missing the Sun.

The drawing shows the Sun, Moon, & Earth during a solar eclipse. What is the correct alignment of these celestial bodies?

• Sun, Moon, Earth

• Sun, Earth, Moon

• Moon, Sun, Earth

• Earth, Moon, Sun