4.5 ecosystem- session 3

..............occurs when it does not rain for a long time.

.............is a large amount of water that covers normally dry land.

A powerful storm may ................

......................can cause ecosystems to change in both positive and negative ways.

If nonliving things cause the ecosystem to change, the.............will be affected.

Ocean waves can cause

In................both living and nonliving things interact.

....................is when the small pieces of rock are carried away by water and sometimes by wind