Earth and Space Science Semester Exam

A big cloud of dust and gas where all stars begin their life cycle is called a

• Solar System

• Galaxy

• Nebula

• Universe

Stars are made mostly of which two elements?

• Hydrogen and Helium

• Hydrogen and Oxygen

• Nitrogen and Helium

• Nitrogen and Oxygen

What happens during the Main Sequence phase of a star?

• Helium is fused into heavy elements

• The star explodes

• Hydrogen fuses into helium

• The star is born out of dust and gas

Which is the stage where a massive star explodes and releases a lot of energy?

• Red Supergiant

• Supernova

• Black Hole

• Main Sequence

In about 5 billion years, our sun will grow 100 times its size into its next stage called a

• Supernova

• Neutron Star

• White Dwarf

• Red Giant

What color are the hottest stars?

• Blue-white

• Yellow

• Blue

• Red

What process takes place in stars which combine lighter elements into heavier ones?

• Nuclear Fission

• Conjunction

• Nuclear Fusion

• Attraction

Which of the following is the correct order of the life cycle of our sun?

• main sequence, red giant, white dwarf

• main sequence, white dwarf, red giant

• white dwarf, main sequence, red giant

• main sequence, red giant, supernova

What is the heaviest element that can be created inside a star?

• Silver

• Iron

• Hydrogen

• Helium

Every element up to which number on the periodic table can be created by a supernova?

• 80-Mercury

• 86-Radon

• 92-Uranium

• 99-Einsteinium