by Callie Oliver | Dec 27, 2018
LE.ETS1A.a :A situation that people want to change or create can be approached as a problem to be solved through engineering.
by Callie Oliver | Dec 27, 2018
LE.PS4C.a :People also use a variety of devices to communicate (send and receive information) over long distances.
by Callie Oliver | Dec 27, 2018
LE.PS4B.b :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 behind them, where the light cannot reach. Mirrors can be used to redirect a light beam.
by Callie Oliver | Dec 27, 2018
LE.PS4B.a :Objects can be seen if light is available to illuminate them or if they give off their own light. Some objects give off their own light.
by Callie Oliver | Dec 27, 2018
LE.PS4A.a :Sound can make matter vibrate, and vibrating matter can make sound.
