Sandra is an avid hiker. she’s found three rocks while hiking near the camden gorge. her identify which type of rocks they are based on the descriptions.

it is an igneous rock that
was formed above
earth’s surface.

it is a metamorphic rock that
experienced tremendous heat
and pressure due to massive,
moving tectonic plates.
it is a sedimentary rock made
primarily from lithification of
organic material.

rock a looks like it was molded
like clay and stretched from both
the sides. its surface is covered
with a pattern of wavy,
elongated stripes.

rock b looks like a bunch of
shells that were glued together
with sand. a few pieces of broken
pebbles poke out near its edges.

rock c has a smooth, glassy
texture. it has no visible
crystals. it is a piece of
solidified magma.

Rock A = It is a metamorphic rock that experienced tremendous heat and  pressure due to massive,  moving tectonic plates.

Rock B = It is a sedimentary rock made primarily from lithification of organic material.

Rock C = It is an igneous rock that was formed above Earth’s surface.

Explanation:

Just had it on a test

Rock A = It is a metamorphic rock that  experienced tremendous heat  and  pressure due to massive,  moving tectonic plates.

Metamorphic rocks are rocks that have been somewhat squished and transformed by heat and pressure. These rocks often have different layers as the rocks go through pressure and are literally look like rocks that have been piled up and then stuck together. The best indicator of this rock being a metamorphic rock is the wavy elongated stripes. The stripes are created from the different rock elements being pressed together over time.

Rock B = It is a sedimentary rock made  primarily from lithification of  organic material.

Sedimentary rocks are rocks that have been formed by different substances that come together due to the different weather conditions. The best indicator of this being a sedimentary rock is how the rock came together and looks like a bunch of shells were glued together.

Rock C = It is an igneous rock that  was formed above  Earth’s surface.

Most igneous rocks have smooth outer layers. These rocks are often made with solidified magma from volcanoes. The best indicator of this being an igneous rock is the indication of it being a solidified piece of magma.