Understanding Earth’s Cycles

What is the water cycle?

• The water cycle is the method of water being filtered through soil and rocks.

• The water cycle is the process of water moving through evaporation, condensation, and precipitation.

• The water cycle is the process of water being stored in lakes and rivers.

• The water cycle refers to the movement of water only through solid forms like ice.

What happens during evaporation?

• Evaporation is the process of gas turning into liquid.

• Liquid turns into solid during evaporation.

• Evaporation is the process where liquid molecules escape into the gas phase.

• Evaporation occurs only at boiling point.

What is condensation?

• The evaporation of water from a surface.

• The process of liquid water turning into water vapor.

• The formation of ice from water vapor.

• Condensation is the process of water vapor turning into liquid water.

What occurs during precipitation?

• Water vapor condenses and falls as rain, snow, sleet, or hail.

• Water vapor evaporates into the atmosphere.

• Water vapor is absorbed by the ground.

• Water vapor freezes and forms icebergs.

What is runoff?

• Runoff is the process of water evaporating from the soil.

• Runoff is the flow of water from precipitation that moves across the land surface into water bodies.

• Runoff refers to the absorption of water by plants.

• Runoff is the collection of water in underground aquifers.

What is the nitrogen cycle?

• The nitrogen cycle is a method of water purification.

• The nitrogen cycle refers to the movement of nitrogen in the atmosphere only.

• The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms, involving steps like nitrogen fixation, nitrification, assimilation, ammonification, and denitrification.

• The nitrogen cycle is the process of photosynthesis in plants.

How does nitrogen circulate in the environment?

• Nitrogen is absorbed directly by plants from the soil without any processes.

• Nitrogen circulates in the environment through the nitrogen cycle, involving processes like nitrogen fixation, nitrification, assimilation, ammonification, and denitrification.

• Nitrogen is primarily released into the environment through volcanic eruptions.

• Nitrogen is only found in the atmosphere and does not circulate.

What is the oxygen-carbon cycle?

• The oxygen-carbon cycle is the process of exchange of oxygen and carbon dioxide between plants, animals, and the environment.

• The oxygen-carbon cycle is a method of carbon storage in the ocean.

• The oxygen-carbon cycle refers to the movement of oxygen in the atmosphere only.

• The oxygen-carbon cycle is the process of photosynthesis in plants.

How do oxygen and carbon dioxide circulate?

• Oxygen is produced by cells and released into the bloodstream, while carbon dioxide is absorbed by the lungs.

• Oxygen and carbon dioxide both circulate from the bloodstream to the lungs and then to the cells.

• Oxygen circulates from the bloodstream to the lungs, while carbon dioxide moves from cells directly to the air.

• Oxygen circulates from the lungs to the bloodstream to cells, while carbon dioxide circulates from cells to the bloodstream to the lungs.

What are the three states of matter involved in the water cycle?

• gas, liquid, steam

• solid, liquid, plasma

• plasma, vapor, mist

• solid, liquid, gas