8th Grade Physical Science Midterm Exam Study Guide

Flashcards covering the key concepts and vocabulary from the 8th grade Physical Science midterm exam study guide.

Matter is defined as __.

Anything that has mass and takes up space.

The difference between mass and weight is that __.

Mass is the amount of matter in an object while weight is the force of gravity acting on that mass.

To measure the mass of an object, you would use a __.

Balance scale.

To measure the weight of an object, you would use a __.

Spring scale.

Volume is defined as __.

The amount of space an object occupies.

To determine the volume of a regular solid, you use the formula __.

Volume = length x width x height.

You can determine the volume of an object using displacement by __.

Submerging the object in water and measuring the volume of water displaced.

Density is defined as __.

Mass per unit volume of a substance.

Mass, volume, and density are related by the formula __.

Density = mass/volume.

The law of conservation of mass states that __.

Mass is neither created nor destroyed in a chemical reaction.

A physical property is defined as __.

A characteristic that can be observed without changing the substance.

A chemical property is defined as __.

A characteristic that describes how a substance interacts with other substances.

Physical changes are different from chemical changes because __.

Physical changes do not alter the chemical composition of a substance.

Signs of chemical changes include __.

Change in color, production of gas, formation of a precipitate, and change in temperature.

The particles that make up matter are __.

In constant motion.

The movement of particles in solids, liquids, and gases affects properties such as __.

Density, pressure, and viscosity.

When a substance gains energy, it __; when it loses energy, it __.

Melts or evaporates; freezes or condenses.

Changes of state include processes such as __.

Freezing, melting, evaporation, condensation, boiling, sublimation, and deposition.