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Stars Review

Last updated over 3 years ago
20 questions
1

Atoms are made of......(select all that apply)

1

Which component of an atom determines what kind of atom it is (For example- what makes an atom of hydrogen different from an atom of helium)?

1

Which factor determines the stages of life a star will experience?

1

The products (what is made) from nuclear fusion are....

1

What force pushes a star "out"?

1

What force pulls a star "in"?

1

Which of the following are the stages of life for a SMALL star (Check ALL that apply)

1

Which of the following are the stages of life for a MEDIUM star (Check ALL that apply)

1

Which of the following are the stages of life for a REALLY REALLY BIG star (Check ALL that apply)

1

During which phase of life does a star change the LEAST?

1

In the earlier stages of life, which element is the most abundant in a star (theres the most of this)?

1

During the Main Sequence stage of life, a star is fusing __________ into __________

  1. hydrogen
  2. helium
1

As a star ages, the amount of hydrogen _________

1

The ________________________ the star, the longer it lives.

1

When a star does nuclear fusion, it converts matter into matter and energy. This is an example of

The universe's three lightest elements — hydrogen, helium and lithium — were created in the earliest moments of the cosmos, just after the Big Bang, and can also be formed from nuclear fusion. Most of the quantities of elements heavier than lithium, up to iron on the periodic table, were forged billions of years later, in the cores of stars. But how elements heavier than iron, such as gold and uranium, were created has long been uncertain.

A supernova explosion expels into space not only the elements formed inside the star through fusion, but elements forged in the supernova blast wave itself. In the explosion, nuclei are bombarded with neutrons, until elements all the way up to uranium are formed within seconds. All these heavier elements are then spread throughout the galaxy by the immense force of the supernova. Supernovas are responsible for changing the composition of gas from which each generation of stars form. Without supernova explosions, there would be no heavy elements in the interstellar gas. In particular, there would be no silicon to form rocky planets, no oxygen to form water, none of the elements we depend on here on Earth. It is the stuff of which we are made.
1

Which of the following elements can be formed from nuclear fusion inside a star?

1

Which elements can only be formed from a massive explosion (supernova)?

1

Your blood has iron in it (thats what carries oxygen to your cells.) Where did this iron come from initially?

1

Electromagnetic emission and absorption spectra are used to determine a star's...

1

What determines a star's emission and absorption spectra?