United States Geography and Environment Flashcard

Front

Ava, Abigail, and Sophia are planning a river adventure! They want to travel along a famous river that stretches about 2,350 miles (3,782 km) from its source in Minnesota all the way to the Gulf of Mexico, making it a super important route for trade. Which river should they choose for their epic journey?

Back

The Mississippi River

Answer explanation

The Mississippi River is the major river that flows 2,350 miles from Minnesota to the Gulf of Mexico, serving as a vital trade route. The other rivers listed do not match this description.

Front

Why is the United States considered one of the most ethnically diverse countries in the world?

Back

Over centuries, immigrants have arrived from many different countries.

Answer explanation

The United States is ethnically diverse primarily because, over centuries, immigrants from various countries have settled there, contributing to a rich tapestry of cultures and ethnicities.

Front

What was the major cause of the economic downturn in the United States in 2008?

Back

A crisis in the home mortgage banking sector

Answer explanation

The 2008 economic downturn was primarily caused by a crisis in the home mortgage banking sector, where risky lending practices led to widespread defaults and a collapse in housing prices, triggering a financial crisis.

Front

During a class hike, Kai, Mason, and Isla noticed that because of widespread ________, the forest they visited was less diverse and the land was eroding. What did they observe?

Back

Clear cutting

Answer explanation

Clear cutting refers to the complete removal of trees in a forested area, leading to reduced biodiversity and increased soil erosion. This makes it the correct choice for the blank in the sentence.

Front

What process is responsible for the strange green overgrowth in the water that Charlotte and Ethan notice in the Everglades?

Back

Eutrophication

Answer explanation

Eutrophication is the process where nutrient runoff, particularly nitrogen and phosphorus, leads to excessive algae growth. This overgrowth can harm ecosystems, making it the correct answer for the damage seen in the Everglades.

Front

What do you call the haze caused by the interaction of ultraviolet solar radiation with chemical fumes from pollutants?

Back

Smog

Answer explanation

Smog is a type of haze formed when ultraviolet solar radiation interacts with chemical pollutants, leading to a mixture of fog and smoke. This makes 'smog' the correct answer, unlike acid rain, desalination, or eutrophication.

Front

Grace and Oliver are on a field trip, exploring famous stone and metal buildings in the United States. Suddenly, they notice some damage to the structures, crops nearby looking unhealthy, and the soil seems polluted. Which environmental problem are they witnessing?

Back

Acid rain

Answer explanation

Acid rain is caused by pollutants in the atmosphere that mix with rainwater, leading to corrosion of buildings, damage to crops, and soil pollution. This makes it a significant environmental problem in the United States.

Front

James and Olivia are curious about the United States. Because of its unique immigration history, what is true about the country?

Back

many different religions are practiced

Answer explanation

The United States has a diverse immigration history, leading to a rich tapestry of cultures and beliefs. This diversity results in the practice of many different religions across the country, making it a pluralistic society.

Front

A wind turbine is a source of ________ energy.

Back

renewable

Answer explanation

A wind turbine generates energy from wind, which is a natural and sustainable resource. Therefore, it is classified as a source of renewable energy, unlike fossil fuels, solar, or geothermal energy.

Front

The ________ State Water Project is the country’s largest state-built water and power development project.

Back

California

Answer explanation

The California State Water Project is the largest state-built water and power development project in the United States, providing water and electricity to millions, making 'California' the correct answer.