Unit 2 Progress Check

Front

What is an OPEN system?

Back

An OPEN system is one where matter can enter and exit freely, allowing for interactions with the environment.

Front

What is a CLOSED system?

Back

A CLOSED system is one where no matter can enter or exit, meaning it is isolated from its surroundings.

Front

What does the independent variable represent in an experiment?

Back

The independent variable is the ONE factor that is changed or manipulated in an experiment to observe its effect.

Front

Why is it important to change only one variable at a time in an experiment?

Back

Changing only one variable at a time helps to identify what specifically causes any changes observed in the experiment.

Front

What does evaporation mean in the context of water molecules?

Back

Evaporation is the process where water molecules gain enough energy to change from a liquid state to a gas state.

Front

What are solid particles?

Back

Solid particles are closely packed together and vibrate in place, giving solids a definite shape and volume.

Front

What are liquid particles?

Back

Liquid particles are close together but can move past one another, allowing liquids to take the shape of their container.

Front

What are gas particles?

Back

Gas particles are far apart and move freely, filling the entire volume of their container.

Front

What is the significance of the blue particle high in the circle?

Back

The blue particle high in the circle represents a water molecule that has evaporated into the air.

Front

What is the role of a control in an experiment?

Back

A control is a standard for comparison that helps to ensure that the results of an experiment are due to the independent variable.