Unit 2 - Review

Multiple Choice

How long ago did Earth form?

• 3.2 million years ago

• 4.6 billion years ago

• 3.2 billion years ago

• 4.6 million years ago

Multiple Choice

TRUE OR FALSE:

The air surrounding early Earth was oxygen rich and able to support life.

• TRUE

• FALSE

Multiple Choice

TRUE OR FALSE:

Cyanobacteria released oxygen as a waste product and as their numbers grew, so did the amount of oxygen in the air.

• TRUE

• FALSE

Multiple Choice

The crust, mantle and core are all parts of Earth’s solid surface and interior, called the _________.

• lithosphere

• atmosphere

• hydrosphere

Multiple Choice

The water layer of the Earth is called the ________ and covers about 70% of Earth’s surface

• lithosphere

• atmosphere

• hydrosphere

Multiple Choice

TRUE OR FALSE:

Water also helps the Earth remain at temperatures that can support life

• TRUE

• FALSE

Multiple Choice

You can think of the ________ as a protective blanket of air that surrounds Earth.

• lithosphere

• atmosphere

• hydrosphere

Multiple Choice

TRUE OR FALSE:

The stratosphere is the layer of the atmosphere that we are able to live in.

• TRUE

• FALSE

Multiple Choice

Water vapor gets into the atmosphere by the processes of evaporation AND _________.

• condensation

• precipitation

• transpiration

Multiple Choice

Water vapor condenses into clouds and then falls to the ground as _______.

• condensation

• precipitation

• transpiration

Open Ended

Desribe the WEATHER outside today.

Multiple Choice

Average ________ and average  ________ have the biggest impacts on living things and where they can survive.

• wind, clouds

• precipitation, condensation

• temperature, precipitation

• r