Science Exam 1 Matter & Chemical Reactions

Front

What is specific heat?

Back

Specific heat is the amount of heat required to raise the temperature of a unit mass of a substance by one degree Celsius. It affects how quickly or slowly a substance can change temperature.

Front

How does water's specific heat affect weather?

Back

Water's high specific heat helps regulate temperature in the environment, influencing weather patterns and climate.

Front

What is a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

How many atoms are in a molecule of ammonia (NH3)?

Back

There are four atoms in a molecule of ammonia: one nitrogen atom and three hydrogen atoms.

Front

What state of matter has particles that move the quickest?

Back

Gas has particles that move the quickest compared to solids and liquids.

Front

What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the components can be easily distinguished and separated, such as a salad.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the components are not easily distinguishable and are uniformly distributed, such as saltwater.

Front

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

Back

A physical change alters the form or appearance of a substance without changing its composition, while a chemical change results in the formation of new substances.

Front

What is an example of a chemical reaction?

Back

An example of a chemical reaction is the rusting of iron, where iron reacts with oxygen to form iron oxide.

Front

What is the law of conservation of mass?

Back

The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction; it is conserved.