Geologists infer from the rounded, eroded shapes of the Appalachian Mountains that

The most important factors in determining how fast a rock formation will erode are

Decomposers are the soil organisms that

What can cause the loss of soil that is not protected by plant cover?

The process by which natural forces move weathered rock and soil from one place to another is called

Landslides mudflows, slump, and creep are all examples of

Where a river flows from an area of harder rock to an area of softer rock, the softer rock may wear away, eventually forming a drop called a(n)

Deltas are built up by

As more water flows through a river, its speed will

How would a fast-flowing river be most likely to move sand-sized particles of sediment?

What is the correct order (starting from the surface) of Earth’s layers?

Earth’s mantle is

Scientists think that convection currents flow in Earth’s

Most geologists think that the movement of Earth’s plates is caused by

The geological theory that states that pieces of Earth’s lithosphere (crust) are in constant, slow motion is the theory of

A place where two plates slip past each other horizontally, moving in opposite directions, is known as a

A rift valley forms at a

A collision between two pieces of continental crust at a colliding boundary produces a

The place where two plates come together is known as a

Geologists know that wherever plate movement stores energy in the rock along faults,

Which of the following is a biotic factor in the grassland ecosystem?

The nonliving parts of an ecosystem are called

To carry out photosynthesis, algae and plants use the abiotic factors sunlight, carbon dioxide, and

In which process do producers (plants) use carbon from carbon dioxide to produce sugars and other carbon-containing molecules?

What gas do producers(plants) release as a result of photosynthesis?

What is the elevation at the highest point of the zipline?

What is the elevation of the lowest point of the zipline?

What is the total drop in elevation from the top of the zipline to the bottom of the zipline?

What is the horizontal distance of the zipline?

Explain how photosynthesis, respiration, food chains, and decomposers work togethet to keep a closed ecosystem alive.