I am a representation of an object or system that is either too big or too small to observe in its natural state.  What am I?

I am a natural feature on Earth's surface.  What am I?

I am a large amount of water that covers normally dry land.  What am I?

I am a huge mass of ice that flows slowly over land and can help create lakes and valleys.  What am I?

I am a body of water surrounded by land.  What am I?

I am a mass of mud and other earthly material that is falling down a hillside or slope.  What am I?

I am a large body of salt water and cover 3/4 of the Earth's surface.  What am I?

I am the violent outpouring of hot ash, molten rock, and gases from a volcano.  I am caused by the buildup of heat and pressure.  What am I?

I am an area of land that is surrounded by water on all sides.  What am I?

I am a very dry area of land.  What am I?

I am the mouth of a river where soil is deposited.  What am I?

I am the shaking of the Earth's surface that is caused by the movement of Earth's crust and mantle.  What am I?

I am a deep valley with very deep sides.  What am I?

I am a flat area higher than the land around me.  What am I?

I am a piece of land surrounded by water on 3 sides.  What am I?

I am an opening in Earth's surface from which lava flows.  What am I?

I am a lowland area between higher lands such as mountains.  What am I?

When rocks break down and erode, they help form ________?

I am mostly responsible for rapidly eroding beaches during a hurricane.  What am I?

I am a place on Earth's surface that is much higher than the land around it.  What am I?

I am a rounded mound of Earth that is lower than a mountain.  What am I?