What type of rock is formed by the cooling of magma or lava?
igneous
What type of rock is formed by pressing down layers of sound?
sedimentary
Material that comes from living things is called ___. (hint: starts with the letter H)
humus
The outermost layer of the Earth that is made of solid rock (labeled A).
crust
The layer of Earth that contains magma (labeled B).
mantle
What type of soil contains large air spaces between particles (labeled A).
sandy
Which type of soil has the worst drainage - loam, sandy, silt, or clay?
clay
Which type of rock is likely to contain fossils?
sedimentary
What type of rock is made from other rocks experiencing heat and pressure?
metamorphic
When rock is worn away by rain, wind, frost, or temperature changes, this is called ___.
weathering
When living things cause rocks to break apart, this is called ___ weathering.
biotic
The movement of rock fragments by gravity, water, or wind is called ___.
erosion
When rock fragments rub against each other and the edges become smoother, this is called ___.
abrasion
The remains of living organisms that have changed into rock.
fossils
What is the age of the Earth?
4.5 billion years (4,500 million)
The Sun rises in the ___ direction.
east
