TEKS 8.8A Universe Test Review PER 5

Front

What is net force and how is it calculated?

Back

Net force is the vector sum of all the forces acting on an object. It is calculated by adding all the forces together, taking into account their direction.

Front

What role does gravity play in a galaxy?

Back

Gravity is the force that holds the stars and all other matter in a galaxy together, preventing them from drifting apart.

Front

What is the spectral class of a star and how is it determined?

Back

The spectral class of a star is a classification system based on its temperature and the characteristics of its spectrum. It is determined by analyzing the star's light and identifying absorption lines.

Front

Why can't we see the entire shape of the Milky Way galaxy from Earth?

Back

We cannot see the entire shape of the Milky Way galaxy from Earth because we are located within the galaxy, which obscures our view of its full structure.

Front

What is a balanced chemical equation?

Back

A balanced chemical equation has the same number of each type of atom on both sides of the equation, indicating that mass is conserved during the reaction.

Front

What is the formula for calculating force?

Back

The formula for calculating force is F = ma, where F is force, m is mass, and a is acceleration.

Front

What is the significance of the Milky Way galaxy in the universe?

Back

The Milky Way galaxy is significant as it is the galaxy that contains our solar system and is one of billions of galaxies in the universe.

Front

What are the main components of a galaxy?

Back

The main components of a galaxy include stars, gas, dust, dark matter, and sometimes black holes.

Front

How does the temperature of a star relate to its color?

Back

The temperature of a star affects its color; hotter stars appear blue or white, while cooler stars appear red or orange.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in kilograms, while weight is the force exerted by gravity on that mass, measured in newtons.