PS2: Unit Review - Lessons 1-6

Front

What is a dependent variable in an experiment?

Back

The dependent variable is the factor that is measured or observed in an experiment, which changes in response to the independent variable.

Front

What is thermal energy?

Back

Thermal energy is the energy that comes from the temperature of matter. It is the total kinetic energy of the particles in an object.

Front

How does thermal energy transfer occur?

Back

Thermal energy transfers from a hotter object to a cooler one until both reach the same temperature.

Front

What is the difference between independent and dependent variables?

Back

The independent variable is the factor that is changed or controlled in an experiment, while the dependent variable is what is measured or observed.

Front

What happens to thermal energy when a hot object is placed in a cooler environment?

Back

The thermal energy from the hot object transfers to the cooler environment, causing the hot object to cool down.

Front

What is energy transfer?

Back

Energy transfer is the process of energy moving from one object or system to another.

Front

What is an example of energy being transformed?

Back

When a battery powers a flashlight, chemical energy in the battery is transformed into light energy.

Front

What is the role of mass in energy transfer?

Back

Mass can affect how much energy is transferred; heavier objects may have more energy due to their greater mass.

Front

What is the relationship between temperature and thermal energy?

Back

Higher temperatures indicate higher thermal energy, as the particles in the substance move more rapidly.

Front

What is an experiment?

Back

An experiment is a scientific procedure undertaken to test a hypothesis by collecting data and observing outcomes.