Unit 2 Review: Astronomy

During a solar eclipse, the Moon is positioned between Earth and the Sun. During which phase of the Moon does a solar eclipse occur?

• gibbous
• new
• full
• crescent

The diagram shows an arrangement of Earth, the Sun, and the Moon.

• stronger magnetic field
• shorter hours of daylight
• early snowfall
• high tide

When it is summer in the northern hemisphere of Earth, it is winter in the southern hemisphere. Which statement explains this fact?

• With more clouds in the winter, less sunlight can reach the surface of Earth.
• Earth is farther from the Sun in winter and closer to the Sun in summer.
• Since Earth is tilted on its axis, heat from the Sun gets distributed unequally.
• The Sun gives off more heat in the summer and less heat in the winter.

Which type of radiation provides astronomers with the most useful information about high-energy events such as stars colliding?

• infrared waves
• gamma radiation
• infrared radiation
• sound waves.

All of these types of waves travel from the Sun to Earth except

• ultraviolet waves.
• sound waves
• infrared waves
• light waves

Which fact best supports the importance of sunlight to life on Earth?

• Few organisms live in the hot springs of Yellowstone National Park.
• Few organisms live in the center of the continent of Antarctica.
• Few organisms live in the high peaks of the Himalayas.
• Few organisms live in the hottest parts of the Sahara.

Which statement describes the motion of Earth around the sun?

• speed increases the closer Earth is to the sun and decreases the farther it is from the sun
• speed increases the further Earth is from the sun and decreases the closer it is to the sun
• the speed of Earth is constant because the distance remains the same between Earth and the sun
• the speed of Earth is constant regardless of its distance from the sun

Why does the moon appear to change during the month?

• because the clouds in the sky hide the moon from Earth
• because the sun blocks the moon from Earth
• because the moon moves father away from Earth
• because the moon reflects sunlight as it rotates around Earth

Which statement best describes the relationship between Earth and the Milky Way Galaxy?

• Which statement best describes the relationship between Earth and the Milky Way Galaxy?
• Earth is part of a galaxy that is nearest to the Milky Way Galaxy.
• Earth is located in the Milky Way galaxy but far from the galaxy center.
• Earth is positioned in the center of the Milky Way Galaxy

The location of our solar system is illustrated in the diagram of the Milky Way Galaxy. Which conclusion can be reached by the location of our solar system?

• Our Sun will be pushed away from the galaxy.
• Our solar system is surrounded by newly formed stars.
• Our solar system has the only planets in the galaxy.
• Our Sun is near the end of its star cycle.