Review for Semester Test Part 3 2024

Front

What is average speed?

Back

Average speed is the total distance traveled divided by the total time taken. It is measured in units such as miles per hour (mi/hr).

Front

How do you calculate average speed?

Back

Average speed = Total distance / Total time.

Front

What is a compound in chemistry?

Back

A compound is a substance formed when two or more elements are chemically bonded together.

Front

What is the chemical formula for carbon monoxide?

Back

CO.

Front

What is displacement in physics?

Back

Displacement is the shortest distance from the initial to the final position of an object, along with the direction.

Front

How do you determine displacement from a figure?

Back

Displacement can be determined by measuring the straight-line distance and direction from the starting point to the endpoint.

Front

What effect do smaller salt crystals have on dissolving in water?

Back

Smaller salt crystals increase the surface area, which speeds up the dissolving process.

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances.

Front

What is an example of a chemical change?

Back

Burning wood, which produces ash and smoke, is an example of a chemical change.

Front

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

Back

A physical change alters the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.