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When did the universe form according to the Big Bang theory?
About 13.8 billion years ago.
What is a fossil?
The preserved remains or traces of living things.
What is weather?
The condition of the atmosphere at any given place and time.
What are the two factors when classifying climate?
Precipitation and temperature.
What is the greenhouse effect?
A process by which greenhouse gases absorb and trap heat to keep the Earth warm.
What gas is released when we burn fossil fuels?
Carbon dioxide.
Name the three types of plate boundaries.
Divergent, convergent, and transform boundaries.
What happens near divergent plate boundaries?
Earthquakes and volcanoes.
What happens near convergent plate boundaries?
Earthquakes, volcanoes, and trenches.
What happens near transform plate boundaries?
Earthquakes.
Name the four layers of the atmosphere.
Troposphere, stratosphere, mesosphere, thermosphere.
What happens in the troposphere?
It’s where Earth’s weather occurs.
What is special about the stratosphere?
It contains the most ozone.
What does the mesosphere do?
It protects Earth from most meteoroids.
What is the thermosphere known for?
It has very low air density and gets extremely hot.
What is one cause and two effects of global warming?
Cause: burning fossil fuels. Effects: melting ice and rising sea levels.
