1st Semester Exam prep

Front

What variables must remain constant in an experiment to accurately compare heat conduction of materials?

Back

The temperature and time the material was exposed to the heat.

Front

What is an indication that a chemical change is taking place?

Back

A gas forms when vinegar and baking soda are mixed.

Front

What is the difference between the atomic number and atomic mass of an element?

Back

The number of neutrons.

Front

What characterizes an endothermic reaction?

Back

It absorbs heat energy and is cold to the touch.

Front

How is an element identified?

Back

By its number of protons.

Front

What is heat conduction?

Back

The transfer of heat through a material.

Front

What is a chemical change?

Back

A process where substances combine or break apart to form new substances.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the atomic mass of an element?

Back

The weighted average mass of an element's isotopes.

Front

What is an example of an endothermic reaction?

Back

Photosynthesis, where plants absorb sunlight.