What does the Hertzsprung-Russell diagram tell us about the star, Betelgeuse? (8.8A)

It has a low surface temperature and high luminosity

It has high surface temperature and high luminosity

It has low surface temperature and low luminosity

It has high surface temperature and low luminosity

Which of the following best describes a star? A star is a celestial body -

composed of gases that emit light due to nuclear reactions.

composed of rock and metal with a very high density.

that is too big to be an asteroid, but too small to be a planet.

that rotates on an axis and revolves around the Sun.

The universe has many different components. Which list places four components of the universe in the most likely order from smallest to largest?

Planets, stars, nebulae, galaxies

Planets, stars, galaxies, nebulae

Nebulae, stars, planets, galaxies

Galaxies, stars, planets, nebulae

A student learns that the sun is classified as a medium-size star and that many stars are much bigger and brighter. However, the student observes that other stars look very dim, even through a telescope. Why do other stars look much dimmer than the sun?

The sun is much closer to Earth than other stars are

The sun appear yellow, which is more visible than other colors.

Other stars are made up of different gases than the sun is.

As light from other stars travels through space, it gets reflected.

An object will continue moving in a straight line unless it is acted on by an unbalanced force. Which of the following best explains Earth's motion?

Earth moves in an elliptical orbit around the sun because the gravitational force of the sun attracts Earth.

There is no unbalanced force acting on Earth because space is empty and nothing touches Earth.

The gravitational force pulling Earth toward the sun is equal and opposite to the force pulling the sun toward Earth, so there is no unbalanced force acting on Earth.

The sun moves in an elliptical orbit around Earth, and the sun's gravity pulls Earth along.

In which list are forms of electromagnetic energy arranged in order from longest to shortest wavelength ?

Microwave -> infrared -> visibile light

Microwave -> Radio wave -> Infrared rays

Visible light -> x-ray -> radio wave

Infrared -> radio wave -> ultraviolet

Components of the Universe STAAR Review

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