Unit 2: Energy - Lesson 1: Light

Unit 2: Energy

Lesson 1: Light

Learning goals:

• ​Natural light

• ​Human-made light

• ​Properties of lights  

• ​Why people can see things

​Where does light come from?

​1. Natural

​Where does light come from?

​2. Human-made

Multiple Choice

Human-made or natural light?

• Human-made light

• Natural light

Multiple Choice

Human-made or natural light?

• Human-made light

• Natural light

Multiple Choice

Human-made or natural light?

• Human-made light

• Natural light

Multiple Choice

Human-made or natural light?

• Human-made light

• Natural light

Multiple Choice

Human-made or natural light?

• Human-made light

• Natural light

​How can we see?

Multiple Choice

Light ……………….. all the way from the sun or from other stars to the Earth.

• bounces

• travels

• blocks

• see

​How does light travel?

​Straight line

​How does light travel?

​Reflect = Bounce off

​How does light travel?

Shadows = blocked light

Multiple Choice

What object allows all light to travel through?

• a book

• a mirror

• a shadow

• a window

Multiple Choice

Light travels in a straight line until what happens?

• it reaches Earth

• it hits an object

• it slows down

• it changes color

Multiple Choice

What is the main source of Earth’s light?

• electricity

• lightning

• the moon

• the sun

Multiple Choice

Shadow happens when an object:

• blocks light

• allows some light to pass through

• reflects light back to the source

• takes most of the light in

Multiple Choice

Which is true about reflected light?

• it travels very slowly

• It follows a curved line

• It allows people to see

• It travels back to the sun