For most organisms, more than​ (a)   of the body is made up of only four elements: ​ (b)   ​ (c)   ​ (d)   ​ (e)  

• 95%
• Carbon
• Hydrogen
• Oxygen
• Nitrogen
• Soup
• Snow
• Gold
• Silver
• 100%

Energy eneters an ecosystem in the form of ​ (a)   and exits in the form of ​ (b)   . This energy cannot be recycled.

• Sunlight
• Heat
• Snow
• Water

Elements and _________ are recycled in Biogeochemical Cycles

A process in which elements, chemical compounds, and other forms of matter are passed from one organism to another from one part of the biosphere to another.

• Snow

• Ecology

• Biogeochemical Cycle

• None of these

Type or types of biogeochemical cycles (More than 1 correct answer!)

• Water Cycle

• Carbon Cycle

• Nitrogen Cycle

• Phosphorus Cycle

Water is crucial to life

• True

• False

Living Cells are ​ (a)   to ​ (b)   water.

• 70%
• 80%
• 100%
• 200%
• 10%

What percentage of water on Earth is contained in oceans?

• 3%

• 50%

• 75%

• 97%

What percentage of the water on Earth is found in lakes, rivers, and in groundwater?

• 1%

• 25%

• 50%

• 99%

What percentage of water on Earth is found in glaciers?

• 1%

• 5%

• 10%

• 2%