Impacts on Organisms

A plant growing in response to the sunlight. 

• Gravitropism 
• Phototropism
• Thigmotropism
• Hydrotropism

Roots of a tree growing towards the water line of a house. 

• Gravitropism 
• Phototropism
• Thigmotropism
• Hydrotropism

The pattern of physical and behavioral changes that follows a 24 hour cycle, in accordance with the hours of light and darkness.

• REM

• NREM

• circadian rhythm

• ultradian rhythm

In a dead zone, _________ levels are really low such that living organisms are not able survive.

• nitrogen

• oxygen

• fertilizer

• carbon dioxide

A gradual increase in the average temperature of Earth's atmosphere:

• Global Warming

• Greenhouse Gas

• El Niño

• Climate

A ______ is a large storm that forms over warm ocean water with very strong winds that blow in a circular pattern around the center, or eye of the storm.

• hurricane
• thunderstorm
• tornado
• blizzard

What gas is increasing in large amounts due to human activities?

• BP
• carbon dioxide
• oxygen
• diesel

Which one of these does not add CO2 to the atmosphere?

• cooking with gas
• planting trees
• burning wood
• riding in a bus

A period of a plant when is does NOT grow

• spore
• stamen
• nutrient
• dormancy

Hot and ______________ climates cause wild fires.

• healthy

• wet

• cold

• dry