Mstep Science

Front

What is the conservation of matter?

Back

The principle that matter cannot be created or destroyed in a chemical reaction; it can only change forms.

Front

What happens to iron when it reacts with oxygen?

Back

Iron oxidizes, forming iron oxide (rust), which can change its appearance and properties.

Front

What is a model in science?

Back

A representation of an idea, object, or process that helps explain or predict phenomena.

Front

What is a trade-off?

Back

A situation where you must give up one thing to gain something else.

Front

How does increasing oxygen exposure affect iron in a hand warmer?

Back

It increases the rate of oxidation, generating heat more quickly.

Front

What is the role of atoms in chemical reactions?

Back

Atoms rearrange to form new substances during chemical reactions.

Front

What is the significance of small holes in a hand warmer bag?

Back

They allow more oxygen to enter, which can speed up the heating process.

Front

What is energy transfer?

Back

The movement of energy from one system to another, such as from a chemical reaction to a thermometer.

Front

What is the final substance formed when iron reacts with oxygen?

Back

Iron oxide, commonly known as rust.

Front

What does it mean for a model to have limitations?

Back

It may not accurately represent all aspects of a phenomenon, such as color changes or atomic organization.