NSTP 2 Exam

The ______ is a natural process that warms the Earth’s surface. When the Sun’s energy reaches the Earth’s atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases.

• greenhouse effect

• ozone layer

• global warming

_____ level reached up to 400 parts per million from 280 parts per million 400,000 years ago.

• Water vapor

• Carbon dioxide

• Methane

• Nitrogen

• Nitrous oxide

Burning of fossil fuels increases the ___ by 33% since the industrial revolution.

• Water vapor

• Carbon dioxide

• Methane

• Nitrogen

• Nitrous oxide

The following are the main greenhouse gases EXCEPT

• Water vapor

• Carbon dioxide

• Methane

• Nitrogen

• Nitrous oxide

_____ particles increase rapidly at higher temperature resulting to an increase of the amount of smog.

• Water vapor

• Carbon dioxide

• Methane

• Ozone

• Nitrous oxide

The following are renewable energy sources EXCEPT

• Solar

• Wind

• Hydro

• Fossil fuel

• Geothermal

Over _____ of the total energy consumed by humans is derived from fossil fuels.

• 15%

• 100%

• 80%

• 39%

• 10%

Renewable energy is ____ of the total energy consumed by humans.

• 15%

• 100%

• 80%

• 39%

• 10%

The ____ acts as a barrier between earth and ultraviolet radiation from the sun.

• greenhouse effect

• ozone layer

• global warming

Pollution can cause the _____ to thin exposing life on earth to dangerous radiation.

• greenhouse effect

• ozone layer

• global warming