Every atom has a _____________, or a central core containing protons and neutrons.

All material in the universe that has mass and occupies space is called _______________.

A(n)____________ is a chemical substance with a given set of properties that cannot be broken down into substances with other properties.

Organic compounds containing only hydrogen and carbon are called______________ and some can be toxic to our environment.

A______________is a combination of two or more atoms of the same type or different types joined by covalent bonds.

A substance composed atoms of two or more different elements is called a(n)____________.

A mixture in which all the ingredients are evenly distributed is called a ______________, air, blood, ocean water, and plant sap are all examples.

Three types of polymers (long chains of of repeated molecules) are essential to life: proteins, nucleic acids, and carbohydrates, as well as lipids (not a polymer) and are known as _____________.

____________ are organic compounds made up of carbon (C), hydrogen (H), oxygen(O), nitrogen (N), and sometimes sulfur (S) and are needed for development of bones, muscles, tendons, ligaments, and cartilage.

____________ are macromolecules that direct protein production and are composed of long chains of nucleotides each of which contains a sugar molecule, a phosphate group, and a nitrogenous base. Responsible for passing genetic code.

____________ are made up of carbon(C), hydrogen(H), oxygen(O), and sometimes phophorus(P), they store energy, are the primary component of cell membranes, and produce bodily changes such as sexual development.

___________ are polymers that consist of atoms of carbon, hydrogen, and oxygen. Glucose is one of the most common and important of these because it provides energy that fuels plant and animal cells.

The acidity or alkalinity of a solution is described by ________.

Solutions in which the hydrogen ion (H⁺⁾ concentration is greater than the hydroxide ion (OH^-) concentration are _______.

Solutions in which the hydroxide ion (OH^-) concentration is greater than the hydrogen ion (H⁺) concentration are __________.

Solutions that have equal numbers of hydrogen ions(H⁺) and hydroxide ions (OH^-) are ________________.

The property of water that causes water to stick to itself and allows the transport of materials, such as nutrients and waste in plants and animals, is known as ____________.

Water molecules have a partial ________charge at the oxygen end.

A water molecule is considered a _________molecule because of the partial negative charge on the oxygen end and the partial positive charge on the hydrogen ends, causing water molecules to adhere to one another (hydrogen bonds).