Ch 2 Mid-Test (2.1-2.2)

Front

What is a solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent).

Front

How many elements are all living things made up of?

Back

All living things are made up of 6 elements.

Front

What is the positively-charged particle in the nucleus of an atom called?

Back

The positively-charged particle in the nucleus of an atom is called a proton.

Front

What is the smallest basic unit of matter?

Back

The smallest basic unit of matter is the atom.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that are not chemically bonded.

Front

What are the four main types of macromolecules essential for life?

Back

The four main types of macromolecules essential for life are carbohydrates, lipids, proteins, and nucleic acids.

Front

What is the difference between a mixture and a solution?

Back

A mixture can be heterogeneous or homogeneous, while a solution is always homogeneous.

Front

What is an atom?

Back

An atom is the smallest unit of an element, consisting of protons, neutrons, and electrons.

Front

What is a compound?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

What is a neutron?

Back

A neutron is a neutral particle found in the nucleus of an atom.