We are reaching the end of the Science unit about Light and Sound. We will be taking the final unit test on Wednesday. Here are some questions you could ask your child about this unit:

1. What is the difference between natural light and artificial light? Could you give me some examples of each? (In class, we sort the following pictures: lantern, lightbulb, flashlight, sun, stars, fire, moon.)
2. What is sound? (Sound is a type of energy made from vibration)
3. What is vibration? (A movement that goes back and forth)
4. How do we hear the sound? (When the sound waves travel through the air and reach our ears, we can hear)
5. Can you name objects that make sound? (instruments, a radio, a telephone, a siren, a whistle etc.). 
6. What is light? (Light is a type of energy that allows us to see.)
7. What is the main source of light? (The sun)
8. Can you name objects that make light? (A flashlight, lightbulb, the sun, stars, a traffic light, etc.)
9. What is transparent? Give an example of a transparent object. (Transparent is when the light passes through the object. For example: windows, clear water bottle, clear glass, water, glasses)
10. What is translucent? Give an example of a translucent object. (Translucent is when some light passes through the object. For example: sunglasses, colored glass, balloon)
11. What is opaque? Give an example of an opaque object. (Opaque is when no light passes through. For example: walls, doors, tables, desks etc.)

We had lots of fun exploring with light and sound. Next week, we will keep exploring light and sound using rulers, flashlight and playing a game of red light/green light. 

Sound can make matter vibrate, and vibrating matter can make sound.

Objects can be seen if light is available to illuminate them or if they give off their light.

Some materials allow light to pass through them, others allow only some light through, and others block all the light and create a dark shadow on any surface beyond them, where the light cannot reach. Mirrors can be used to redirect a light beam.

People also use various devices to communicate (send and receive information) over long distances.

Vocabulary for this week: vibrating, sound wave, sound, hearing, vocal cords, eardrum, light, light source, opaque, translucent, transparent, dark.