EARTH SCIENCE

The solidified lava of a volcano belongs to which rock family?

• Igneous

• Sedimentary

• metamorphic

• fossilized

What percentage of the earth's atmosphere does O2 comprise?

• 78%

• 21%

• 1%

• 22%

The tanning rays of the sun are called:

• Infrared rays

• Visible light

• Ultraviolet rays

• Gamma rays

Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities?

• ozone and carbon monoxide

• ozone and methane

• nitrous oxide and sulfur dioxide

• methane and carbon dioxide

   

The ozone layer is in which region of the atmosphere?

• Troposphere

• Stratosphere

• Mesosphere

• Thermosphere

Which of the following is a metamorphic rock?

• Sandstone

• Granite

• Marble

• Quartz

The mineral halite is:

• potassium chloride

• sodium chloride

• calcium chloride

• calcium bromide

Fluorite is what number on Moh's hardness scale?

• 7

• 4

• 2

• 9

What is the name of the phenomenon that causes an accumulation of heat in the lower atmosphere because of the absorption of longwave radiation from the Earth's surface?

• Greenhouse effect

• Climate change

• Geothermal

• Heatwave

The streak of a mineral can be obtained most easily by performing?

• Putting the mineral into acid

• Scratching the mineral with a diamond

• Rubbing the mineral on an unglazed white tile

• Examining the mineral under a microscope