Cia #2 review - universe/ physics/chemistry

Front

What is a super giant star?

Back

A super giant star is a massive star that is cool and bright, often found at the end of its life cycle.

Front

What does the Law of Conservation of Mass state?

Back

The Law of Conservation of Mass states that during a chemical reaction, the total amount of matter stays the same.

Front

In a chemical reaction, how do the number of atoms in products compare to reactants?

Back

The number of atoms in the products will always equal the number of atoms in the reactants.

Front

What is the mass of a closed system after a chemical reaction if the initial mass was 15 g?

Back

The mass of the closed system after the chemical reaction will still be 15 g.

Front

What type of galaxy is characterized by spiral arms?

Back

A spiral galaxy is characterized by its spiral arms.

Front

Define a chemical reaction.

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

Front

What is the significance of balancing a chemical equation?

Back

Balancing a chemical equation ensures that the Law of Conservation of Mass is satisfied, meaning the number of atoms for each element is the same on both sides.

Front

What are the main components of a chemical equation?

Back

The main components of a chemical equation are reactants, products, and coefficients.

Front

What is the difference between an endothermic and exothermic reaction?

Back

An endothermic reaction absorbs heat, while an exothermic reaction releases heat.

Front

What is a closed system in the context of chemical reactions?

Back

A closed system is one where no matter enters or leaves during the chemical reaction.