Atoms/astronomy exam one review

The estimated age of the earth is

• 2. 13.8 billion years

• 1. 4.6 million years

• 1. 13.8 thousand years 

• 4.6 billion years

What are the two most abundant elements in a nebula?

• 2. Hydrogen and Carbon

• 1. Hydrogen and Helium

• 1. Helium and Oxygen

• 1. Hydrogen and Iron

The nuclear process involved inside a star

• 2. Nuclear combustion

• 1. Nuclear fission

• 1. Nuclear division

• 1. Nuclear fusion

The estimated age of the universe

• 1. 13.8 billion years

• 1. 4.6 million years

• 3. 13.8 million years

• 1. 4.5 billion years

How long a star will live all depends on its

• Amount of mass at the time of its formation

• 1. Amount of mass during the supernova phase

• 1. Amount of mass during the red giant phase

• 1. Amount of mass during the main sequence phase

The color of a star tells us

• The distance from earth to a star

• 1. The size of a star

• 1. The temperature of a star

• 1. The mass of a star

The true brightness of a star is referred to as

• 1. True magnitude

• 1. Stellar contrast

• 1. Apparent magnitude 

• 1. Absolute magnitude

 All heavy elements found on the periodic table were formed from

• 1. A nebula

• 1. A Main sequence star

• 1. A supernova

• A Protostar

The sun is an example of which classification of star

• 2. Protostar

• 1. Main sequence

• 1. Red giant

• 1. White dwarf

1. The forces involved in bringing the elements together to create a planet or star is/are known as

• 2. Gravity

• 1. Electrostatic

• 1. Nuclear 

• Both gravity and electrostatic