7th Grade Semester Exam

Front

What is a chemical change?

Back

A chemical change changes matter from one form to another.

Front

What is the difference between speed and velocity?

Back

Velocity includes the direction the object is traveling.

Front

What is necessary for life as we know it to exist on a planet?

Back

Liquid water is necessary for life as we know it to exist.

Front

Which object is at the center of the solar system?

Back

The Sun is at the center of the solar system.

Front

What is an example of an unbalanced force?

Back

An unbalanced force occurs when one force is greater than another, causing motion.

Front

Define matter.

Back

Matter is anything that has mass and takes up space.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass cannot be created or destroyed in a chemical reaction.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the role of the Sun in the solar system?

Back

The Sun provides light and heat, and its gravitational pull keeps the planets in orbit.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion.