Astronomy - Earth in Space

What is the study of the moon, stars, and other objects in space called?

• Biology

• Astronomy

• Geology

• Chemistry

What is the imaginary line that passes through Earth's center and the North and South poles called?

• The imaginary line is called the Earth's axis.

• The imaginary line is called the Earth's equator.

• The imaginary line is called the Earth's meridian.

• The imaginary line is called the Earth's tropic.

What is the movement of one object around another called?

• Rotation
• Orbit
• Revolution
• Translation

Earth travels around the _______.

• the Sun

• the Moon

• Mars

• Venus

What shape is Earth's orbit?

• Spiral
• Elliptical
• Rectangular
• Circular

Sunlight hits Earth's surface most directly near the equator because:

• the Earth is flat at the equator.

• the equator is closer to the sun.

• the Earth's axis is tilted, causing the equator to receive more direct sunlight.

• the equator has less atmosphere to filter the sunlight.

Sunlight arrives near the poles at a ______ angle.

• steep

• shallow

• wide

• narrow

Earth has seasons because:

• it is closer to the sun during summer and farther during winter.

• its axis is tilted as it orbits the sun.

• it rotates on its axis.

• it has a circular orbit around the sun.

What is the tilt of Earth's axis?

• 23.5°

• 22.1°

• 24.5°

• 21.0°

As Earth revolves around the sun, the north end of the axis is tilted away from the sun for part of the year and toward the sun for part of the year. True or False?

• True

• False