Question

the water cycle
directions: use the reading and diagram to answer the following questions abou
water cycle.

1. what is the main way water returns from the atmosphere to earths surface?

1. what causes evaporation to occur?

1. how do plants contribute to the water cycle?

1. what is transpiration?

1. what is the difference between runoff and infiltration?

1. what is groundwater flow and why is it important?

Explanation:

1. Precipitation is the main way water returns from the atmosphere to Earth's surface. It includes forms like rain, snow, sleet, or hail.
2. Evaporation occurs due to heat (usually from the sun). Heat energy causes water (in liquid state, like in oceans, lakes, etc.) to change into water vapor (gas state).
3. Plants contribute to the water cycle through transpiration. They absorb water from the soil through roots, and then release water vapor into the atmosphere through small pores (stomata) in their leaves.
4. Transpiration is the process by which plants release water vapor into the atmosphere. It is similar to evaporation but specifically related to plant - based water release.
5. Runoff is the flow of water (over land) that occurs when there is more water than the ground can absorb immediately (e.g., during heavy rain, water flows over the surface of the land). Infiltration is the process by which water soaks into the soil, moving from the surface into the ground.
6. Groundwater flow is the movement of water beneath the Earth's surface through porous rocks and soil. It is important because it is a major source of freshwater for wells (used for drinking water, irrigation, etc.). It also helps maintain baseflow in rivers (especially during dry periods) and supports ecosystems (like wetlands that depend on groundwater).

Answer:

1. Precipitation
2. Heat (usually from the sun)
3. Through transpiration (absorb water from soil and release water vapor via leaves)
4. The process by which plants release water vapor into the atmosphere
5. Runoff: water flows over land surface; Infiltration: water soaks into the soil
6. Movement of water beneath Earth's surface through porous rocks/soil; important as a freshwater source (for wells, etc.) and for ecosystem support (e.g., river baseflow, wetlands)