Impact Social Studies Grade 3 Chapter 2 Review

What are fossil fuels?

• Fuels such as oil, natural gas, and coal

• Energy from the sun

• Areas with wind turbines

• A type of dam

Answer explanation

Fossil fuels are natural energy sources formed from the remains of ancient plants and animals. The correct choice identifies them as oil, natural gas, and coal, which are key energy resources used globally.

What do solar panels do?

• Produce large amounts of electricity

• Collect energy from the sun to turn it into electricity

• Provide electricity with wind turbines

• Surround the Earth with gases

Answer explanation

Solar panels collect energy from the sun and convert it into electricity. This process is known as photovoltaic conversion, making the correct choice about their function.

What is a wind farm?

• A type of dam

• A community of living things

• Areas with wind turbines that provide electricity

• The loss of forests

Answer explanation

A wind farm consists of areas with wind turbines that harness wind energy to generate electricity, making it a renewable energy source. The other options do not accurately describe what a wind farm is.

What is the atmosphere?

• A type of dam

• The layer of gases that surrounds the Earth

• A community of living things

• The loss of forests

Answer explanation

The atmosphere is defined as the layer of gases that surrounds the Earth, essential for life and weather. The other options do not accurately describe the atmosphere.

What is deforestation?

• The loss of forests

• An event that damages the environment

• A type of dam

• A community of living things

Answer explanation

Deforestation refers specifically to the loss of forests, often due to human activities like logging and agriculture. This choice accurately defines the term, while the other options do not relate directly to deforestation.

How did Native Americans adapt to their environment?

• They built skyscrapers

• They lived near water and used it to travel

• They invented airplanes

• They used solar panels

Answer explanation

Native Americans adapted to their environment by living near water sources, which provided them with essential resources for travel, fishing, and trade, making it a crucial aspect of their survival and culture.

What is air pollution?

• Anything put into the air that might harm the environment and living things.

• When people do not properly dispose of trash.

• When harmful chemicals, gases, and waste are put into the water.

• When animals are harmed by loud noises.

Answer explanation

Air pollution refers to any substance introduced into the air that can harm the environment and living organisms. This includes harmful chemicals and particulates, making the first choice the correct definition.

Where are earthquakes most likely to occur in the United States?

• The Pacific Coast

• The Gulf Coast

• The Atlantic Coast

• The Midwest

Answer explanation

Earthquakes are most likely to occur along the Pacific Coast due to the presence of the San Andreas Fault and other tectonic plate boundaries, making it a seismically active region compared to the Gulf, Atlantic, or Midwest areas.

What is one way that local and state governments help people during natural disasters?

• They provide emergency money to help people recover.

• They build new roads.

• They plant more trees.

• They organize sports events.

Answer explanation

Local and state governments provide emergency money to help people recover from natural disasters, ensuring they have the financial support needed to rebuild their lives. This is a crucial form of assistance during such crises.

How do hydroelectric dams benefit people?

• They provide electricity from the moving water.

• They increase air pollution.

• They cause more earthquakes.

• They make the weather colder.

Answer explanation

Hydroelectric dams harness the energy of moving water to generate electricity, providing a renewable and clean power source for communities, unlike the other options which do not represent benefits.