| A | B |
|---|
| I am the tiny bits of sand, mud, and rocks that cover the continental shelf, slope, and rise. | sediment |
| I am the measure of how much matter an area contains. Cold water with high salinity is high on this measure. | density |
| I am an organism found in the ocean. I am responsible for producing much of the Earth's oxygen. | phytoplankton |
| I am the deep flat part of the ocean floor. | abyssal plain |
| I am a mountain chain that builds up slowly as melted rock pours out of cracks in the ocean floor. | mid-ocean ridge |
| I am a break in the ocean floor that creates a deep canyon. | ocean trench |
| I am molten rock inside the earth. | magma |
| I am the type of rock that forms when lava cools and hardens. | igneous rock |
| I am the type of rock that forms due to pressure and heat inside the Earth. | metamorphic rock |
| I am the type of rock that forms when tiny particles of older rock become cemented together. | sedimentary rock |
| I am the gradual wearing or washing away of soil and rock by glaciers, water, or wind. | erosion |
| I am the breaking down of rock into smaller fragments. I produce sediment, clay, sand, and rock pieces. | weathering |
