Fall Semester Flashcard 2

Front

What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.

Front

What is a chemical change?

Back

A chemical change is a change that results in the formation of new chemical substances. Examples include burning, rusting, and digestion.

Front

How does heat transfer occur?

Back

Heat transfers from an area of high temperature to an area of low temperature.

Front

What are conductors?

Back

Conductors are materials that allow heat and electricity to flow through them easily. Examples include metals like copper and aluminum.

Front

What are insulators?

Back

Insulators are materials that do not allow heat or electricity to flow through them easily. Examples include rubber, glass, and wood.

Front

How do you calculate average speed?

Back

Average speed is calculated by dividing the total distance traveled by the total time taken. Formula: Average Speed = Total Distance / Total Time.

Front

What is the average speed of a runner who completes 100 meters in 10 seconds?

Back

10 m/s.

Front

What happens when sugar is mixed with water?

Back

Mixing sugar and water is a physical change because the sugar dissolves but does not change its chemical structure.

Front

What is the difference between a physical and chemical change?

Back

A physical change does not alter the chemical composition of a substance, while a chemical change results in the formation of new substances.

Front

What is an example of a chemical change in everyday life?

Back

An example of a chemical change is the rusting of iron when it reacts with oxygen and moisture.