14.4 The Universe

Scientists have calculated the Universe to be ______

• 13.7 billion years old

• 4.6 billion years old

• 186,000 years old

• 66 million years old

Stars of all sizes convert _____________ into helium and energy. This is called ____________________.

• hydrogen; hydrocarbon combustion

• oxygen; nuclear fission

• hydrogen; nuclear fusion

• nitrogen; convection

Tags

NGSS.HS-ESS1-1

NGSS.HS-PS1-8

A light year is ______________________.

• the distance light travels in one year.

• the distance from the sun to the Earth

• the time it takes for light to travel 186,000 miles.

The measure of the total energy radiated by a star per second?

• wavelength

• light year

• luminosity

• apparent magnitude

The luminosity of the star is affected by the ....

• size of the star

• color of the star

• distance of the star

The color of the star is determined by the _____________

• the distance from the Earth

• its luminosity

• size of the star

• temperature of the star

What type of star has a low temperature and a high luminosity?

• red super giant

• white dwarf

• blue giant

• main sequence

Tags

NGSS.HS-ESS1-3

The Solar Nebula Theory describes _____

• that stars were formed by clouds of dust and gas by the force of gravity

• the universe began as a singularity and has expanded over the past 13.7 billion years.

• how Earth's moon was formed

Average-sized stars such as our sun will eventually become a _____________ at the end of its life.

• super nova

• black hole

• red giant

• white dwarf

Neutron stars begin its life as a _____________________

• average-sized star (low mass)

• massive star (high mass)

• red giant

• asteroid