Unit 3 Lessons 1-5 "Pre-Test"

Front

What is specific heat?

Back

The amount of heat energy required to raise the temperature of a specific amount of a substance by one degree Celsius.

Front

What are the reactants in a chemical equation?

Back

The substances that undergo a chemical change in a reaction.

Front

What are the products in a chemical equation?

Back

The substances that are formed as a result of a chemical reaction.

Front

What does it mean for a molecule to be polar?

Back

A molecule is polar when there is an unequal sharing of electrons, resulting in a slight charge difference across the molecule.

Front

What are ions?

Back

Atoms or molecules that have gained or lost electrons, resulting in a net electrical charge.

Front

What is cohesion?

Back

The attraction between molecules of the same substance.

Front

What is adhesion?

Back

The attraction between different substances.

Front

What is the role of water in biological systems?

Back

Water acts as a solvent, a temperature buffer, and is essential for biochemical reactions.

Front

What is a chemical equation?

Back

A symbolic representation of a chemical reaction showing the reactants and products.

Front

What is the difference between an ionic bond and a covalent bond?

Back

An ionic bond involves the transfer of electrons, while a covalent bond involves the sharing of electrons.