Grand Canyon

Use the diagram and relative dating to determine what is the oldest layer. 

• The bottom layer will contain the oldest fossils
• The top layer will contain the oldest fossils
• It is impossible to tell which layer contains the oldest fossils with out absolute dating
• Layer A and C contain fossils from the same period

Use the diagram and the law of superposition to make a statement about the image. 

• The bottom two layers are generally the same age range
• The bottom layer is most likely the oldest and the top layer is most likely the youngest
• The top two layers cannot be determined because of weathering and erosion that may still be occuring

The attached image shows the Grand Canyon. The Unkar Group shows an areas where there may have been some folding and faulting. Choose the best answer to explain what impact this may have on dating the fossils in this layer.

• This may cause items dated in this layer to be incorrectly dated if the scientist only uses relative dating.
• Scientists must take into consideration the folding and faulting that is happening in this image when dating the layers.
• The most accurate way to date this layer of rock would be to use absolute dating.
• The most accurate way to date the fossils would be to use the Law of Superposition

Sometimes sea shells can be found in strange places.  Like deserts and on mountains. Other than plate boundaries moving what is another reason for this?

• The earth's tilt on its axis has changed over the years and the equator use to be farther south
• Sea levels use to be much lower 
• Plate boundary movement is the only correct explanation for marine fossils in strange places
• The sea levels use to be much higher and covered most of the land on earth. So marine fossils are found in places far from water

___________ is the process of wind, water or other factors breaking rock down. This is most likely to happen on the surface of the rock where the rock comes into contact with air and water.

• Erosion
• Weathering
• Deposition
• Rock Cycle

________________ is the process of weathered rock pieces moving and coming together to make new rocks.  Big rocks are usually made of smaller rocks.

• Weathering
• Erosion
• Deposition
• Sedimentation

_{Sedimentary Rocks are often made up of other rocks and minerals.}

• True
• False

Small, solid pieces of materials from rocks or living things

• sediment
• clastic rock
• organic rock
• deposition

Name this rock.

• lithographic limestone
• breccia
• coal
• conglomerate

What sized sediment makes shale?

• Sand
• Clay
• Cobble