HR Diagram text webquest

pg 626

What is a light year?

• the distance light travels in one year

• the distance from the sun to the Earth

• the time it takes for light to travel from the sun to the Earth

Pg 629

Two stars that orbit each other, bound together by gravity.

• Binary stars

• Twin stars

• dual stars

• supernova

pg 630

Each binary star exerts a gravitational force on the other, both stars orbit a point between them called ...

• geographical center

• gravitational center

• center of mass

• center distance

pg 631

Which sized binary star would be closest to the "center of mass"?

• low mass

• high mass

• equal distance

pg 631

What process tells us which binary star is moving towards up and which is moving away?

• tidal force

• spectrometry

• doppler effect

• centrifugal force

pg 632

Which Law can we use to help find the mass of the binary stars?

• Kepler's 3rd planetary motion

• Einstein's Special Relativity

• Einstein's General relativity

• Newton's Law of gravitation

pg 632

Kepler's 3rd law states there is a relationship between the TIME it takes for an object to go around another object and the ________

• density

• temperature

• distance from it

• diameter

pg 633

The smallest mass that a true star can have is about ______ that of the Sun.

• 1/12

• 1/2

• 1/4

• 1/150

pg 634

An object not hot enough to fuse protons and are intermediate in mass between stars and planets.

• brown dwarfs

• yellow dwarf

• red giant

• black hole

pg 635

According to figure 18.9, there is a direct relationship between mass and _______.

• rotation

• color

• luminosity

• distance