Our sun is this spectral type.

The least massive stars end their life cycle as:

On a Hertzsprung-Russell diagram, most stars spend the majority of their life as

Between now and the last stage of our sun's life as a white dwarf, it will become

The redshift of light from distant galaxies provides evidence that the universe is

According to this table, the average temperature of the universe since stage 3 has

According to the table, how soon did protons and neutrons form after the beginning of the universe?

Cosmic background radiation provides direct evidence for the origin of

Which piece of evidence best supports the theory that the universe began with an explosion?

Which evidence best supports the theory that the universe began with a massive explosion

The Big Bang Theory is an explanation for...

Scientists estimate the Big Bang happened...

The first elements created after the Big Bang were...

Compared to Earth's solar system, the whole universe is

Which sequence correctly lists the relative sizes from SMALLEST to LARGEST?

The _____ of a star determines its life cycle, including how it dies.

Galaxies are

Earth's seasons are caused by

According to the H-R Diagram, a star with a luminosity of 10³ and a temperature of approximately 4,000 K would be classified as a

What process powers stars, including our sun?

What element is the main component of most stars?

The name of the theory that explains how our universe formed:

All stars form from

Stars are born inside of...

In Nuclear Fusion....

Stars with more mass...

The Sun is a...

When the core of a high mass star collapses it produces a...

A Hertzsprung- Russell (HR) Diagram measures...

What happens in the core of a star?

Before stars were stars, what were they?

If a star being observed from Earth has a red shift, what does it mean?

More massive stars generally have shorter life cycles than less massive stars because massive stars...

What is a characteristic of the White Dwarf?

Which of these presents the celestial objects in order of smallest to largest?

Which of these is true?

Cosmic Background Radiation is made up of ___

The next stage in the life cycle of our Sun is ____

Stars and galaxies did not form until about 4.6 billion years ago

An enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars.

contracting mass of gas which represents an early stage in the formation of a star, before nucleosynthesis has begun

stars that are fusing hydrogen atoms to form helium atoms in their cores.

very large star of high luminosity and low surface temperature, thought to be in a late stage of evolution when no hydrogen remains in the core to fuel nuclear fusion.

a small very dense star that is typically the size of a planet, formed when a low-mass star has exhausted all its central nuclear fuel and lost its outer layers as a planetary nebula.

extremely large red giant star with a minimum of 15 solar masses. The best known red supergiant is Betelgeuse, with a luminosity about 10,000 times that of the Sun.

star that suddenly increases greatly in brightness because of a catastrophic explosion that ejects most of its mass.

a celestial object of very small radius and very high density, composed predominantly of closely packed neutrons, thought to form by the gravitational collapse of the remnant of a massive star after a supernova explosion

a region of space having a gravitational field so intense that no matter or radiation can escape.

INFORMAL

a measure of the amount of matter in an object.

the intrinsic brightness of a celestial object

is the force by which a planet or other body draws objects toward its center

involves the combining of several small nuclei into one large nucleus with the subsequent release of huge amounts of energy.

This scientist is credited with coining the term "Big Bang".

Which of the following is NOT an evidence of the Big Bang?

This element is the lightest,most abundant in the universe and is the key component of stars

When did the big bang occur?

The farther away galaxies are from us, the _______________ it is that they are moving away from us.

Most scientists believe the Big Bang explains which of the following questions?

Our theory of the universe was confirmed when the WMAP mission photographed the fossil remnant heat we now call _______

Astronomers think that the solar system formed from an interstellar

The density of gas in a collapsing interstellar cloud is low at first, but ____________________draws matter together until it is concentrated enough to form a star and possibly planets.

Where is the concentration of matter the densest as an interstellar cloud collapses?

The Sun formed when the dense concentration of gas and dust at the center of a rotating disk reached a temperature and pressure high enough to fuse hydrogen into

The rotating disk surrounding the young Sun became our

Space objects built of solid particles that can form planets through collisions and mergers are called

Theories of the origin of the solar system rely on direct ___________________ and data from probes.

Select all that apply

Which factors determine the force of gravitation between two bodies?

Approximately how long ago was our sun formed?

The group of inner planets are known as:

The group of outer planets are known as: