Space Systems Unit Review

Very energetic particles that move in all directions around the nucleus of an atom are __________.

• electrons

• charges

• neutrons

• protons

Tags

NGSS.MS-PS1-1

How many neutrons are in an atom of Oxygen

Tags

NGSS.MS-PS1-1

If the atomic number of an element is 6 and its mass number is 14, how many neutrons are contained in the nucleus?

• 20

• 8

• 14

• 6

What determines the name of an atom?

• The number of protons in the nucleus
• The number of electrons in the atom
• The number of neutrons in the nucleus
• The number of protons orbiting the nucleus

Where are stars formed?

• a red giant

• a black hole

• a nebula

• a supernova

A star is born when _____________.

• a protostar begins to cool

• a nebula expands

• helium and oxygen combine

• nuclear fusion starts

Tags

NGSS.HS-ESS1-1

As a star goes through its life cycle its _____ changes.

• temperature

• radius (size)

• luminosity

• none of these

The most common chemical element in most stars is _____.

• helium

• hydrogen

• nitrogen

• oxygen

Tags

NGSS.HS-ESS1-3

All stars, regardless of size, eventually ________.

• run out of fuel and collapse

• turn into white dwarfs

• become black holes

• turn into novas or supernovas

The force that tends to pull together the matter in stars is __________________.

• nuclear fusion

• gravity

• nuclear fission

• expansion

Tags

NGSS.HS-PS2-4