Natural Light and Earth's Motion

The video explains how light enables us to see during the day and night. It covers natural light sources like the sun and stars, and artificial sources such as flashlights and streetlights. It also discusses bioluminescent animals like fireflies and jellyfish. The video further explains Earth's rotation and orbit, which cause day and night cycles.

What is the primary source of natural light during the day?

• The stars

• Fireflies

• The sun

• The moon

Which of the following is NOT a human-made source of light?

• Computer screen

• Firefly

• Street light

• Flashlight

What phenomenon allows jellyfish to glow in the dark?

• Photosynthesis

• Refraction

• Reflection

• Bioluminescence

Which of the following is a natural source of light at night?

• Fireflies

• Flashlights

• Street lights

• Computer screens

Where does the sun go at night?

• It stays in the center of the solar system

• It sets in the ocean

• It moves to the other side of the Earth

• It hides behind the moon

How long does it take for the Earth to complete one orbit around the sun?

• One month

• One year

• One day

• One week

What is the term for the path Earth takes around the sun?

• Spin

• Rotation

• Revolution

• Orbit

What causes the cycle of day and night on Earth?

• The sun moving around the Earth

• The Earth spinning on its axis

• The stars shining at night

• The moon blocking the sun

How often does the Earth complete a full spin on its axis?

• Every 12 hours

• Every 24 hours

• Every 48 hours

• Every 72 hours

When your part of the Earth faces away from the sun, what time of day is it?

• Sunrise

• Sunset

• Nighttime

• Daytime