Quiz On Sun And Stars: DIFFERENT TYPES OF STARS AND STAR FORMATION

Question 1

What accounts for different stars being seen in the sky during different seasons of the year?

Accepted Answer

Earth's revolution around the sun

Question 2

According to Einstein's theory of relativity, in the formula E=mc2, the c stands for

Accepted Answer

the speed of light

Question 3

When the outward force due to fusion balances the inward force of gravity...

Accepted Answer

equilibrium

Question 4

Northern lights and southern lights are other names for

Accepted Answer

auroras

Question 5

The number of hydrogen atoms that fuse to form a helium atom is...

Accepted Answer

four

Question 6

A main-sequence star generates energy by fusing...

Accepted Answer

hydrogen into helium

Question 7

Stars appear to move in circular paths through the sky because...

Accepted Answer

Earth rotates on its axis

Question 8

What are binary stars?

Accepted Answer

pairs of revolving stars held together by gravity

Question 9

The most common element in most stars is...

Accepted Answer

hydrogen

Question 10

A nebula begins the process of becoming a protostar when the nebula...

Accepted Answer

begins to shrink, increase its spin and temperature

Question 11

Sunspots are regions of...

Accepted Answer

intense magnetism

Question 12

The observed change in the frequency of a wave when either the source or observer is moving...

Accepted Answer

Doppler effect

Question 13

What is apparent magnitude?

Accepted Answer

the brightness of a star as it appears from Earth

Question 14

The change in position of a nearby star as seen from different points on Earth's orbit is...

Accepted Answer

parallax

Question 15

Which of the following choices lists the colors of stars from hottest to coolest...

Accepted Answer

blue, white, yellow, orange, red

Question 16

The heaviest element formed in the core of a star is...

Accepted Answer

iron

Question 17

What happens to main sequence stars (the sun) when energy from fusion is no longer available?

Accepted Answer

they collapse and become white dwarfs

Question 18

Which layer of the sun has the densest material?

Accepted Answer

the core

Question 19

The part of the sun that is normally visible from Earth is the...

Accepted Answer

photosphere

Question 20

The surface temperature of a star is plotted against its luminosity on the

Accepted Answer

H-R diagram.

Question 21

Which type of star is most likely to be found on the main sequence?

Accepted Answer

yellow star

Question 22

A nuclear reaction in which atomic nuclei combine is called...

Accepted Answer

fusion

Question 23

How do stellar spectra provide evidence that stars are actually moving?

Accepted Answer

Doppler shifts occur in the star's spectrum

Quiz On Sun And Stars: DIFFERENT TYPES OF STARS AND STAR FORMATION

Questions 23

Quiz On Sun And Stars: DIFFERENT TYPES OF STARS AND STAR FORMATION

Questions 23