NC Check In 2 Physical Science

Front

What is a chemical change?

Back

A chemical change is a process where substances combine or break apart to form new substances with different properties, such as burning wood.

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.

Front

What is habitat destruction?

Back

Habitat destruction is the process in which natural habitats are rendered unable to support the species present, often due to human activities.

Front

How does the demand for renewable energy change with fossil fuel prices?

Back

As fossil fuel prices rise, the demand for renewable energy typically increases as people seek alternative energy sources.

Front

What is the main disadvantage of wind turbines?

Back

Wind turbines are efficient only in certain areas, which limits their effectiveness in regions with low wind speeds.

Front

What are photovoltaic cells?

Back

Photovoltaic cells are devices that convert sunlight directly into electricity with minimal environmental impact.

Front

What is the environmental impact of burning fossil fuels?

Back

Burning fossil fuels can lead to air pollution, increased carbon dioxide levels, and contribute to climate change.

Front

What is energy transformation?

Back

Energy transformation is the process of changing energy from one form to another, such as converting solar energy into electrical energy.

Front

What is the role of hydroelectric power plants?

Back

Hydroelectric power plants generate electricity by using the flow of water to turn turbines, but they can also cause habitat destruction.

Front

What is the difference between renewable and non-renewable energy?

Back

Renewable energy comes from sources that can be replenished naturally, like solar and wind, while non-renewable energy comes from sources that can deplete, like coal and oil.