Pre-test (Earth Science)

Which is NOT true about the Earth?

• a terrestrial planet

• has an atmosphere

• has one moon

• revolves around the sun for 24 hours

Where did the water in Earth's early oceans come from?

• the escape of water vapor and other gases from the molten rocks of the Earth

• a comet which hit the earth

• an asteroid that collided with the earth

• the moon

Which layer of the atmosphere is the ozone layer found?

• exosphere

• troposphere

• stratosphere

• mesosphere

What do you call the rocks formed from solidified lava?

• igneous rocks

• metamorphic rocks

• sedimentary rocks

• extrusive rocks

Using Moh’s scale, which of the minerals is the hardest?

• calcite

• steel

• corundum

• quartz

Which property is the least reliable way of identifying a mineral?

• hardness

• color

• density

• luster

How much temperature is needed to melt the rock and extract the metal from the ore?

• less than 100 degrees Celsius

• exactly 100 degrees Celsius

• more than 900 degrees Celsius

• more than 100 but less than 900°C

Where is the largest reservoir of fresh water on Earth stored?

• aquifers

• atmosphere

• ocean

• glaciers

How much percent of saline water is there in the Earth relative to all water as a whole?

• 70%

• 30%

• 96%

• 4%

What is 1% of Earth's water?

• freshwater

• frozen water

• saltwater

• rainwater