Human Impact and Populations Mid-Term TEST

Plants and trees help reduce soil erosion by doing which of the following?

• take in soil through roots leaving little to be washed away

• purify the water in the ground and keep soil from being washed away

• weight of the plants and trees on the ground keep the soil in place

• roots firmly hold the soil in place preventing it from washing away

Cities can mitigate flood damage by doing which of these answers below?

• large barriers are built along each building in a flood zone

• all houses and businesses near a river are built on stilts

• cities construct levees on both sides of the river

• levees are strategically placed and structures are built on higher elevations

The best methods of mitigation for air pollution due to transportation would NOT include which of the following?

• purchasing a hybrid car that uses less gasoline

• driving to work alone, in a mini van

• carpooling to and from work

• using mass transit (buses, trains) more often

To responsibly reclaim land from the mining of natural resources, the mining company should include which of the options below?

• cover with topsoil and plant trees for habitat

• paying taxes on all capital gains

• removing all equipment from the site and filling the mine in with dirt

• processing minerals for commercial use and leaving the land as is

Which human activity below would be considered the MOST likely to be a contributing factor in global warming?

• Humans have created acid rain by releasing sulfuric acids into the air in the exhaust from factories.

• Humans have added carbon dioxide to the atmosphere by burning fossil fuels.

• Humans have changed the chemistry of the world's oceans by the use of phosphates and nitrogen.

• Humans have released vast quantities of chemicals that have created excess ozone in the upper atmosphere.

What is a long term effect of deforestation?

• El Nino

• Lumber shortage and high prices

• contributes to global warming due to less drawn down of CO2

• increased volcanic eruptions

What is the best way listed below to conserve water?

• Stopping all of the little leaks in your home.

• wash dishes by hand and not use the dishwasher

• taking only showers and no baths

• taking showers that are only half as long as usual

Which of the following below would result from an increase in the human population?

• Humans would always have enough food to support the population numbers.

• The birth and death rate are even so this is not an issue for the human population.

• Humans are adaptable to any change in nature and therefore are not affected.

• Some humans would unfortunately die due to a lack of resources necessary to sustain life.

Which is a NATURAL CAUSE to global warming?

• burning fossil fuels

• car exhaust

• use of solar panels

• cows passing gas

Which of the following is an example of the HUMAN IMPACT on Global Warming?

• heat from the sun

• burning fossil fuels

• volcanic eruptions

• greenhouse effect