Environmental Science Final Exam Review

Imagine you're a time-traveling ecologist like Kai, observing the human population trends over the years. What fascinating trend have you noticed?

• It has increased exponentially, like a thrilling roller coaster ride!

• It has decreased exponentially, like a vanishing magic trick!

• It has decreased slowly, like a melting ice cream on a cool day.

• It has increased slowly, like a snail on a leisurely stroll.

Answer explanation

In recent years, the human population has increased exponentially due to factors like improved healthcare, better living conditions, and higher birth rates, leading to a rapid growth in numbers.

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Imagine you're an environmental detective like Mason, trying to identify a harmful substance that contaminates a

natural environment. What would it be?

• Deforestation

• Environmental Impact

• Overexploitation

• Pollution

Answer explanation

Pollution is a harmful substance that contaminates the natural environment, making it the correct choice. Deforestation, environmental impact, and overexploitation refer to different environmental issues.

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Aria and Mia are on an adventure to explore the impact of humans on nature. They stumble upon a scene where trees have been cut down. Can you help them identify which type of human impact is shown in the picture below?

• Desertification

• Deforestation

• Urban sprawl

• Land pollution

Answer explanation

The picture likely depicts deforestation, which is the clearing of trees for land use. This process significantly impacts ecosystems, unlike desertification, urban sprawl, or land pollution, which involve different environmental issues.

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Imagine you're on a thrilling adventure with Mia, Daniel, and Samuel, exploring the mysteries of nature. Suddenly, you stumble upon a magical stream. Which of the following magical ingredients, if added to the stream, would cause it to burst into a vibrant, accelerated eutrophication?

• Bacteria and viruses

• pesticides

• herbicides

• phosphates

• acid wastes

Answer explanation

Phosphates are nutrients that promote algal blooms in water bodies, leading to accelerated eutrophication. This process depletes oxygen and harms aquatic life, making phosphates the correct choice for this question.

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Emma and Zoe are on a mission to save the lake from turning into a green soup! What type of pollution is causing these pesky algal blooms?

• deforestation

• chemical plants dumping into rivers

• fertilizers from agricultural areas

• oil spills from tanks and cars

Answer explanation

Eutrophication and algal blooms are primarily caused by excess nutrients, particularly nitrogen and phosphorus, from fertilizers used in agriculture. These nutrients run off into water bodies, promoting algal growth.

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During a lively classroom debate, Kai asked, "Can anyone tell me which of the following is an example of a nonrenewable natural resource?"

• wind energy

• sunlight

• natural gas

• geothermal energy

Answer explanation

Natural gas is a nonrenewable resource because it forms over millions of years from decomposed organic matter and cannot be replenished on a human timescale. In contrast, wind, sunlight, and geothermal energy are renewable resources.

James and Abigail are on a mission to save the planet! But they discovered that the need for more cropland has led to the ______________________ of large wooded areas. Can you help them find the right term?

• Deforestation

• Conservation

• Rotation farming

• Tilling

Answer explanation

The need for more cropland typically results in deforestation, which is the clearing of large wooded areas. This process is necessary to create space for agricultural activities, making 'deforestation' the correct choice.

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In the delightful adventure of The Biggest Little Farm, what was the name of the charming dog that kept everyone on their toes, including Isla and Daniel?

• Molly

• Greasy

• Emma

• Todd

Answer explanation

In the documentary The Biggest Little Farm, the dog's name is Todd. This is confirmed by various references throughout the film, making Todd the correct answer among the options provided.

Imagine you're on a mission with Priya and Henry to save the planet! What happens to Earth's temperature if more greenhouse gases are released into the atmosphere?

• Temperature goes up

• Temperature goes down

Answer explanation

Releasing more greenhouse gases traps more heat in the atmosphere, leading to an increase in global temperatures. Therefore, the correct answer is that the temperature goes up.

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During a lively classroom debate, Anika and Luna are discussing energy sources. Anika claims there's an electricity source that emits very little CO2. Can you guess which one she's talking about?

• Natural gas

• Coal

• Petroleum

• Nuclear

Answer explanation

Nuclear energy produces very few CO2 emissions compared to fossil fuels like natural gas, coal, and petroleum, making it a cleaner electricity source.

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