human impact on ecosystems

According to the graph, what is the relationship between the human population and carbon emissions?

• When the population increases, the carbon emissions will decrease.

• When the population decreases, the carbon emissions will increase

• When the population increases, the carbon emissions stay the same

• When the population increases, the carbon emissions will also increase.

Which factor has been the main cause of many species becoming endangered or extinct?

• loss of habitat

• oil spills

• hunting

• global warming

Which of the following practices would result in the loss of biodiversity in an ecosystem?

• clearing a forest and building a housing development

• allowing a small forest fire to burn after lightning strikes

• walking through a forest to identify all of the tree species

• hunting deer in a forest during hunting season

In some countries today, people have cut down rainforests in order to have wood for heating and cooking. Which statement describes the greatest immediate negative impact of this deforestation?

• The ozone layer will be damaged.

• Acid rain will increase.

• Animals and plants will lose their habitats.

• The amount of oxygen in the air will dramatically decrease.

In a region, human population increases at a very high rate resulting in increased human activities that lead to deforestation and setting up of industries.

What impact will this high rate of increasing population have on the ecosystem?

• increase toxic waste in soil and air

• limit the carbon dioxide in the atmosphere

• limit the energy consumption by population

• increase native species population in ecosystem

Global warming has been linked to a decrease in 

• the size of the polar ice caps 

• the temperature of Earth 

• the rate of species extinction 

• the rate of carbon dioxide production

What is the cause of increased carbon dioxide in the atmosphere?

• burning fossil fuels

• breathing

• garbage

The main human activity that releases greenhouse gases is...

• using bottled water

• burning fossil fuels

• texting on cellphones

• eating meat

The warming of the atmosphere by the trapping of heat being radiated to space is called

• evaporation

• condensation

• the greenhouse effect

• radiation

Without any greenhouse effect the Earth would be...

• Fine

• Too Cold to Support Life

• Very Hot