Life on Earth Test Review

Front

What is the ability of sediment to hold water back called?

Back

Water retention is the ability of sediment to hold water, which is crucial for maintaining moisture in the soil and supporting plant life.

Front

Which sphere of Earth includes all the water?

Back

The hydrosphere includes all the water on Earth, encompassing oceans, rivers, lakes, and water vapor in the atmosphere.

Front

What is an example of physical weathering?

Back

Ice wedging is a type of physical weathering where water seeps into cracks in rocks, freezes, and expands, causing the rock to break apart.

Front

Why do urban areas have more runoff than rural areas?

Back

Urban areas have more runoff due to more pavement, which prevents water from being absorbed into the ground, leading to increased surface runoff.

Front

What is the effect of surface tension in water?

Back

Surface tension in water causes water molecules to be attracted to each other on the surface, allowing small objects to float and forming droplets.

Front

Define permeability in the context of soil.

Back

Permeability is the ability of soil to transmit water and air through its pores, affecting how easily water can flow through the ground.

Front

What is the lithosphere?

Back

The lithosphere is the rigid outer layer of the Earth, consisting of the crust and upper mantle, and is involved in tectonic activity.

Front

Explain the process of erosion.

Back

Erosion is the process by which soil and rock are removed from the Earth's surface by natural forces such as wind, water, and ice.

Front

What is the biosphere?

Back

The biosphere is the global sum of all ecosystems, where life exists, including land, water, and the atmosphere.

Front

What role does vegetation play in water retention?

Back

Vegetation helps in water retention by absorbing water through roots and reducing surface runoff, allowing more water to infiltrate the soil.