Unit 6, Lesson 1

Unit 6, Lesson 1

The Earth, Sun and Moon

How Can This Be?

Day and Night

• the Sun's rays travel in straight lines to Earth

• Rays strike one side of Earth at a time...DAY

• The other side is dark...NIGHT

• There are 24 hours in one day

• The Sun is not to scale (size)

• Earth's tilt is a 23.5 degree angle

• Earth's rotation, or spin, on its axis causes day and night

Multiple Choice

What causes day and night?

• Earth's rotation, or spin, on its axis

• Earth's poles

• Earth is three-fourths water