No rain falls on a prairie for many months, and the stream there dries up. What natural event is this?

Heavy rain makes a river spill over its banks and cover a meadow with water. What natural event is this?

Wind and rain carry soil off a bare hillside a little at a time each year. What natural event is this?

Oak trees in one forest turn brown and die as a sickness spreads from tree to tree. What natural event is this?

Lightning strikes dry grass and flames sweep across a prairie. What natural event is this?

A fire burns a prairie, and tender green shoots later grow back from the grass roots. What happens to the deer that eat grass there?

A river floods a marsh and leaves shallow pools with trapped fish in them. What happens to the herons that hunt fish there?

A long drought dries a pond until only a small puddle is left. What happens to the fish that live in the pond?

A drought dries the waterholes in a grassland for many weeks. What do many of the deer there do?

Grasshopper eggs hatch best in warm, dry soil. One year, hot, dry weather lasts all summer in a grassy field. What most likely happens to the grasshoppers there?

Rain washes most of the soil off a steep hillside and leaves bare rock. What happens to the young trees trying to grow there?

Erosion cuts a river bank into a bare wall of sandy dirt. What happens to the bank swallows that nest there?

A disease kills most of the rabbits in a meadow one spring. What happens to the grass the rabbits used to eat?

A fast grass fire sweeps across a field where box turtles live. What happens to many of the turtles?

A fire kills many trees in a forest, and beetles move into the dead wood. What happens to the woodpeckers there?

A river flood leaves a wide strip of fresh wet mud along the bank. What happens to the cottonwood seeds that land on it?

A disease kills most of the deer in a forest where wolves hunt deer and deer eat young trees. Why does the disease help the young trees but harm the wolves?

A flood covers a low meadow, and it helps the frogs that breed there while it harms the mice that nest in burrows.

A prairie fire kills the grass roots, so the burned grass can never grow back.

After a long drought dries up a stream, some of the birds that drank there move away to find water.