Author: Julia Medina

Now that we are officially transitioning back-to-school we are releasing a series of math card games for students ages 4-12. These games help them practice math fluencies they will need to master while still enjoying some low-stakes summer fun. 

Games include:

• Fluently adding to 10, subtracting to 5
• Identifying fractions with the same value (including fractions greater than 1)

This game is for students in grades 3 through 6. They will practice finding equivalent numbers (numbers that have the same value). 

Were there any words or ideas that you did not understand?

What is the light you see in a classroom?

Light that bounces off of things.

Light that is absorbed by things.

Light that was absorbed by things and sorted.

Light that is created by the things in the classroom

 

Please enter the first three words of a sentence that shows your answers is correct.

What makes light look white?

when it has very long waves

when it has very short waves

when the waves are all absorbed

when it has waves that are all the different wavelengths of visible light

 

Please enter the first three words of a sentence that shows your answers is correct.

What happens when a shirt looks black?

The shirt soaks up all the waves of light.

The shirt bounces back all the waves of light.

The shirt only lets black light bounce back to your eye.

The shirt changes all the waves to the same wavelengths which are all black. 

Please enter the first three words of a sentence that shows your answers is correct.

The author wrote “White is a combination of all colors, so when we see white, the object is reflecting all the colors of light the same.”

What does “combination” mean in this context?

mix

lack of

an example

things happening in a row

The author wrote “For example, when you see your favorite red shirt, the shirt is absorbing all the colors of light except for the color red.”

What does “absorbing” mean in this context?

bouncing back

making no difference to

being pulled in or soaking up

changing so it is a little darker

Sabiha Basit wrote “Different wavelengths of reflected light create different colors!”

What does “reflected light mean in this context?

very dark lights

very bright colors

light that bounces off

light that forms waves

What is the main idea of this chapter?

All the light we see is created by things we see. 

Electromagnetic waves mix together to create white lights

Different colors of light are created by different lightbulbs

Light is an electromagnetic wave that can be absorbed or reflected

• Wave on a String
  • Explore the wonderful world of waves! Even observe a string vibrate in slow motion. Wiggle the end of the string and make waves, or adjust the frequency and amplitude of an oscillator.
• Sound
  • This simulation lets you see sound waves. Adjust the frequency or volume and you can see and hear how the wave changes.
• Magnets & Compass
  • Ever wonder how a compass worked to point you to the Arctic? Explore the interactions between a compass and bar magnet, and then add the earth and find the surprising answer!
• Molecules & Light
  • Adjust light source slider and begin your observations of how different molecules react to different light sources.
• Balloons & Static Electricity
  • Grab a balloon to explore concepts of static electricity such as charge transfer, attraction, repulsion, and induced charge.
• Radio Waves and Electromagnetic Fields
  • Broadcast radio waves from KPhET. Wiggle the transmitter electron manually or have it oscillate automatically. The strip chart shows the electron positions at the transmitter and at the receiver.