E is for …
Check out what E stands for …
Electricity
Electric current, the movement of negative particles through a material, used as a source of power.
Sentences:
NASA uses solar power to make electricity on the space station.
During the thunderstorm, the electricity went out and we couldn’t watch TV.
Electromagnetic Spectrum
All the wavelengths of visible and invisible light. Visible light is near the center of the spectrum.
Sentences:
Some NASA telescopes can see parts of the electromagnetic spectrum that we cannot see with our eyes.
Microwaves from the electromagnetic spectrum heat food in microwave ovens.
Ellipse
A flattened circle or oval.
Sentences:
Earth’s orbit around the sun is in the shape of an ellipse.
A racetrack is shaped like an ellipse.
Emergency Egress
A quick exit from a vehicle because of a dangerous situation requiring action right away.
Sentences:
Before launching on a spacecraft, astronauts practice emergency egress in case they have to escape quickly.
When schools have a fire drill, they are practicing emergency egress.
Energy
The ability to do work.
Sentences:
Astronauts eat a healthy breakfast to give them energy to do their work.
A power plant can provide energy for an entire city.
Engineer
A person who uses scientific facts to solve real problems.
Sentences:
My mom is an engineer who designs rockets for NASA.
If you like math or science, you may want to become an engineer.
Related Links:
Intro to Engineering Video
Equator
An imaginary line drawn right around Earth’s middle, like a belt.
Sentence:
The equator divides Earth into the Northern Hemisphere and the Southern Hemisphere.
Escape Velocity
The speed needed for an object to break away from the gravitational pull of a planet or moon.
Sentence:
Each planet has a different escape velocity.
Exhaust
Hot gases released from a rocket motor or engine.
Sentences:
The rocket gave off big exhaust clouds during its launch.
Exhaust from cars and airplanes can cause pollution.
Related Links:
What Is a Rocket? (Grades K-4)
What Is a Rocket? (Grades 5-8)
Experiment
A test or tests that are used to find out or prove something or to see whether an idea is correct.
Sentences:
Astronauts perform many science experiments on the International Space Station.
My science class used lima bean seeds in a plant experiment.
Exploration
The act of looking into or studying something unknown.
Sentences:
One day you might be part of an exploration team that travels to Mars.
My sister earned her exploration badge after she hiked through the woods.
Extravehicular Mobility Unit
Another name for an airtight spacesuit worn by astronauts while working outside of the spacecraft in space.
Sentences:
The white suit that astronauts wear when they are working in space is sometimes called their Extravehicular Mobility Unit, or EMU.
The EMU protects astronauts from the harmful environment of space.
Related Links:
What is a Spacesuit? (Grades K-4)
What is a Spacesuit? (Grades 5-8)
