Science Mid Term

Climate change over the he millennia has been attributed to natural as well as man-made causes. Cite two causes of natural climate change. What reason do scientists give for believing modern-day climate change is the result of man's activities on Earth?

1. Volcanic activity 2. Variations in sunlight from change in earth's orbit or the sun radiation being emitted

Most of the infrared radiation from Earth is?

Absorbed and re-emitted by greenhouse gases

The various impacts of global climate change

Affect animals and humans everywhere

Which graph best shows the likely effect on climate

C

Fossil fuels, the remains of once living plants and animals, primarily recycle the element __________ and when burned these fuels add the element back into our atmosphere

Carbon

Weather is different from climate because it ?

Changes more frequently

Ice cores from Antarctica allow scientists to measure the amounts of atmospheric carbon dioxide from long ago. These samples would best provide evidence for

Climate change

When the sun has more sunspots solar radiation reaching earth will

Increase

Which conclusion might be drawn between the relationship found in the graphs of global carbon emissions and global temperature over the past 150 years

Increased carbon emissions from human activities are directly correlated to increased global temperatures

Burning of fossil fuels has changed the atmosphere by?

Increasing the concentration of carbon dioxide

Every year the number of vehicles running on the roads is increasing. These vehicles release many harmful gases into the atmosphere. What effect does this have on living things

It causes respiratory disorders in humans and animals

Which method of waste disposal is the leading contributor to the production of methane gas?

Landfills

The largest source of greenhouse gas emissions by anthropogenic sources is

Electricity production

A positive feedback mechanism of global climate change acts to

Further enhance global climate change

Based on the data shown, what reasonable conclusion can be drawn?

Global temperatures tend to increase an carbon emissions increase

What is the likely negative effect on earth if extra carbon dioxide is added to our atmosphere

Global warming

Which of the following does not contribute to an enhanced greenhouse effect

Oxygen

An example of a climate change mitigation strategy is

Recycling materials to reduce waste

The single most important method of reducing global climate change is

Replace fossil fuel conbustion with renewable green power resources

The greenhouse effect is?

Responsible for keeping earth habitable

What are the basic steps in this system of energy input and output

Solar radiation reaching the earth system and being absorbed, thermal, radiation emitted by the earth system

Several atmospheric gases contribute to global warming: carbon dioxide, methane, and nitrous oxide. Considering this, which choice would do the least to directly reduce atmospheric carbon dioxide?

The conversion of restaurant grease to bio-diesel fuel for use by motorists

Global warming is caused by an increase in the level of carbon dioxide gas in the atmosphere. How has this affected the worlds oceans?

The oceans are absorbing the excess carbon, causing the oceans to become acidic

What human activity is most responsible for the damage to the ozone layer?

The use of freon and CFC spray propellants

The result of global warming is an increase in earths temperature. Which ecosystem would most likely be eliminated as a result of temperature increase

Tundra