Earth's Carbon Cycle
Earth's nitrogen Cycle
Earth's oxygen cycle
Earth's Spheres
which cycle?
100

Methane is found here

What is the Atmosphere?

100

Nitrogen is a critic of these organic compounds

What are proteins and DNA?

100

Helps living things by absorbing harmful UV radiation

What is ozone?

100

These four reservoirs in the Earth system

What is lithosphere, Atmosphere, biosphere, and hydrosphere?

100

The Earth's element cycle moves this element through the atmosphere, oceans, soil, and living organisms. Plants absorb it, animals eat plants, and decomposers return it to the soil and air. Fossil fuels store and release it when burned. Oceans absorb it, supporting marine life and sediments. This cycle regulates climate and sustains life by balancing this key element.

What is the Carbon cycle

200

Carbon location on the periodic chart

What is number 6?

200

first practical process to convert atmospheric nitrogen gas into ammonia, later found to be harmful to the environment

What is The Haber-Bosch Process?

200

Process of changing CO2  That is exhaled by living things to make oxygen

What is Photosynthesis?

200

Ash from a forest fire is carried by the wind to a forest where it lands and causes the pH of the soil to increase



What is Atmosphere-Lithosphere?

200

The Earth's atmosphere is balanced by a cycle where plants and algae release a crucial gas through photosynthesis, and animals, plants, and microbes consume it during respiration. Geological activities like weathering and volcanic eruptions also contribute to this cycle, ensuring the gas's continuous replenishment and balance.


What is oxygen cycle?

300

Sea creatures build these using carbonate ions

What are shells?

300

this form of nitrogen is used in fertilizer

What is nitrates?

300

A location in which atoms of an element are held for a long period of time

What is a reservoir?

300

Extra fertilizer in water can cause algae to reproduce and bloom out of control


What is Hydrosphere-Biosphere?

300


The Earth's cycle of a crucial element begins with bacteria converting atmospheric gas into forms usable by plants. Plants absorb it, and animals get it by eating plants or other animals. When they die, decomposers return it to the soil. Some of it goes back to the atmosphere through denitrification, keeping the ecosystem balanced.


What is the nitrogen cycle?

400

Process changes dead organisms into fossil fuels

What is decomposition?

400

Microorganisms--simple, living organisms that we can not see with the naked eye--are critical to the nitrogen cycle.

What is bacteria?

400

Helps living things release energy from food


What is Oxygen?

400

 composed of: components, a boundary and flows.


What is a system?

400

The cycle that contains photosynthesis

What is the Carbon cycle?

500

Seashells and other carbonate based materials end up as sediment which can eventually turn into this sedimentary rock

What is limestone?

500

 converting ammonia and nitrates in soil back to free atmospheric nitrogen. This nitrogen returns to the air, completing the nitrogen cycle.

what is Denitrification?

500

Areas, also known as "dead zones", in oceans and lakes

 

What is hypoxic?

500

studying the core of Earth

What is lithosphere?

500

The cycle that contains resperation

What is the oxygen cycle?

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