DIA 5 Review 2

Visible light makes up a ____________ part of the electromagnetic spectrum.

• large

• no part

• a very small part

• most of

We use electromagnetic radiation for many things. Which of these is not a use of electromagnetic radiation.

• The Hubble Telescope taking photos of the universe

• sending telephone signals from satellites to your phones

• a rocket being launched from Cape Kennedy

• solar panels on your house to generate electricity

When the wavelength of radiation from a star increases a star is moving away from us, and when it decreases it is moving toward us. If you were studying a star and the radiation wavelength from it was increasing, what could you conclude was happening?

• The star is moving closer to us

• The star is not moving

• The star is not real

• The star is moving away from us

When light from stars passes through the Earth's atmosphere light is re- fracted or bent, scattered and dispersed, and dimmed and reddened. Knowing this, where would be the best place to put a telescope?

• On a mountain top away from cities

• in space

• somewhere in a desert

• in a city like New York

What are the dark spots we see on the surface of the Sun caused by?

• a dark area—called the umbra, which appears dark because it’s cooler than the rest of the Sun’s surface

• gases from inside the Sun

• giant dust storms

• hurricanes on the Sun's surface

What is the event shown in this photograph called?

• a solar flare

• a corona

• a sunspot

• a meteor impact

How is apparent magnitude of a star determined?

• the distance from Earth

• the number of sunspots on it

• where in the sky it appears

• how many solar flares are seen

What two things determine the absolute brightness of a star?

• size and temperature

• size and color

• color and mass

• none of the above

You see two stars that look like they are next to each other but are different colors. Why might they be different colors?

• they are different distances away

• they are different temperatures

• they are in different galaxies

• one of then does not really exist

We know that Earth has more mass than the moon. If you were to visit the moon, which of these would happen?

• your weight would change

• your weight and mass would change

• your weight and mass would be the same as on Earth

• your mass would change