7th Grade Science First Semester Test

Front

Where can electrons be found?

Back

Electrons can be found on the outside of the nucleus.

Front

What is an acid?

Back

An acid is a chemical substance that reacts with metals and carbonates, is corrosive, tastes sour, and turns litmus paper red.

Front

How are covalent bonds formed?

Back

Covalent bonds are formed by the sharing of electrons.

Front

What type of energy is stored when you stretch a rubber band?

Back

When you stretch a rubber band, you are storing potential energy.

Front

Which acid is NOT found in the human body?

Back

Battery Acid is NOT found in the human body.

Front

What is the definition of potential energy?

Back

Potential energy is the energy stored in an object due to its position or state.

Front

What is kinetic energy?

Back

Kinetic energy is the energy of an object in motion.

Front

What is the pH scale?

Back

The pH scale measures how acidic or basic a substance is, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.

Front

What is a chemical reaction?

Back

A chemical reaction is a process that leads to the transformation of one set of chemical substances to another.

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.