Physical Science Final

What is always produced as a result of a chemical reaction?

• a gas

• a color change

• a new substance

Bubbling or fizzing indicates that a ___ has been produced as in a chemical reaction.

A chef uses flour, eggs, and milk to make pancakes. Which of these is the product of this reaction?

• flour

• eggs

• milk

• pancakes

Which of the following models best demonstrates a balanced chemical equation?

• F
• G
• H
• J

What is the difference between a chemical change and a physical change?

Water in a pot on a stove gets hot because of a transfer of ____ energy.

• thermal

• kinetic

• heat

• electric

There are 2 identical cakes sitting on a plate. One cake is 40°C, the other is 20°C, and the plate is a cold 10°C. Describe the transfer in energy.

• Energy goes from the 40°C only to the plate.

• Energy goes from the plate to the cakes.

• Energy goes from both cakes to the plate.

The amount of potential energy depends on the ______ of an object.

• size

• height

• temperature

When a ball rolls down a hill, potential energy is converted to ________ energy.

Which type of energy is not present in a lightbulb?

• radiant

• thermal

• mechanical