Energy Unit Week 34 Directions 1.Prepare your desk for science. Science notebook Sound homework 2.Use voice level 2 (conversation) to share one answer from your homework with a partner. If you have time, share the second answer.

Share Homework Questions: How does the thickness of an object affect vibration, frequency, and pitch? How does the tension of an object affect vibration, frequency, and pitch?

Table of Contents Add a new page!

Targets & Warm Up Targets: Students will understand what light energy is and how it travels. Warm Up: What is light energy? What do you know about light energy?

Table of Contents DateTitlePage Light Energy83 Once you are finished with the Table of Contents, go to page 83 and add the title and date to the top of the page.

Some Sources of Light Energy Sun Bonfire Street lamp Firefly Which is the most important for humans? Which involves bioluminescence? Which is human-created?

Light Bulb What energy does a light bulb use? What energy does a light bulb produce?

How does light travel? Light travels in straight lines called rays that fan outward from the source of light. You can see how light travels by looking at a shadow.

Electromagnetic Radiation All forms of light are called electromagnetic radiation. – All electromagnetic waves travel at the same speed through empty space and carry energy Humans can see some light, but they can only see a small part of the universe’s light energy. Light travels as waves, but humans can only see certain waves. This is because of their wavelengths and frequencies.

Frequency & Wavelength Frequency The number of waves that pass a point in a certain amount of time Wavelength The distance between a point on one wave and a similar point on the next wave

Frequency & Wavelength ________________ wavelength = _______________ frequency

Visible Light

Colors in the visible spectrum Red, orange, yellow, green, blue, and violet light White light is a blend of the colors in a rainbow

Invisible Light

Radio waves, microwaves, and infrared waves have wavelengths that are too long Ultraviolet waves, X rays, and gamma rays have wavelengths that are too short

BrainPop Video tromagneticspectrum/ Electromagnetic Radiation (4 minutes)

Reflection Questions What is light energy? How does light travel from its source? What are some sources of light energy? – What are some examples of light we can see – What are some examples of light we cannot see?

Targets (Revisited) Students will understand what light energy is and how it travels.

Homework SubjectHomeworkDue Date ScienceNone