HMH Unit 6.2 Day Four

HMH Unit 6.2 Day Four

Pgs 404-406

Carbon and Nitrogen Cycles

• Matter cycles through Earth’s spheres. It moves among the spheres and is combined and recombined in different ways.

• Recall that water moves among Earth’s spheres through the water cycle. 

• The sun provides energy to the water cycle. Energy is vital to the cycles of matter. 

Carbon and Nitrogen Cycles

• The carbon cycle shown is important to the biosphere. 

• But a larger version of the carbon cycle also impacts gases in the atmosphere, the weathering of rocks of the geosphere by those gases, and the particles that end up in oceans of the hydrosphere

• 
  

Multiple Choice

Respiration is a process that results in carbon being _______ by organisms.

• taken in

• released

• fossil fuels

• food molecules

• producers

Multiple Choice

Carbon in the atmosphere taken in by plants can be used in the formation of ________ during the process of photosynthesis.

• taken in

• released

• fossil fuels

• food molecules

• producers

Multiple Choice

Carbon and nitrogen in the remains of once-living things is released by the action of _________.

• taken in

• released

• decomposers

• food molecules

• producers

Multiple Choice

Bacteria play a key role in the nitrogen cycle when they ______ nitrogen.

• fix

• released

• decomposers

• food molecules

• producers

Case Study—Glen Canyon Dam

Humans are a part of the biosphere. Human actions can impact all of Earth’s spheres. The Glen Canyon Dam is an example of the ways in which human activities influence Earth’s spheres and systems. There are advantages and disadvantages to all human activities.

Open Ended

What are some advantages of the Glen Canyon Dam and Lake Powell? Answer in complete sentences.

Open Ended

What are some disadvantages of the Glen Canyon Dam and Lake Powell? Answer in complete sentences.

Open Ended

How do organisms in the biosphere affect all of the other spheres? Answer in complete sentences.