1. Rocks provide lots of evidence that the Earth is constantly changing. Rock particles are washed down rivers and settle at the bottom of the sea. This process is called..
A. erosion
B. sedimentation
C. folding
D. fossil formation
2. If rocks are contiuously being broken down on land by the action of wind, water and ice , then eventually all the hills and mountains would disappear. This tells us that..
A. rocks are easily worn away
B. sand forms new rocks on land
C. mountains must be continuously formed
D. rocks are easy to melt.
3.The Earth must be older than the oldest rock, which are known to be about
A. 4000 years old
B. 4 million years old
C. 4 thousand million years old
D. 4 million million years old
4. Wegener is a famous scientist who explained the changes in the surface of the earth with the theory of ..
A. continental drift
B. fossilisation
C. mountain formation
D. glacial erosion
5. His theory suggested slow movement of vast slabs of surface rock, called
A. tectonic plates
B. island plates
C. magma plates
D.mantle plates
6. He also suggested that movement of the Earth's plates was caused by
A. heat from the Sun
B. the Earth's magnetic field
C. conduction through the Earth's crust
D. convection currents in the Earth's mantle
7. The movement of these plates causes several features at the edges of the plates, including
A. volcanos, mountain erosion, or earthquakes
B. volcanos, mountain building, or earthquakes
C. mountain erosion, mountain building, or earthquakes
D. volcanos, mountain building, or mountain erosion
8. Which answer correctly describes these features?
Plates move towards eachother
Plates move apart
A
seafloor spreading
earthquakes, mountain erosion
B
earthquakes and volcanos
earthquakes
C
earthquakes, volcanos, mountains
seafloor spreading
D
seafloor spreading
mountain building
8. Seafloor spreading occurs at a rate of
A. a few millimeters a year
B. a few centimeters a year
C. a few meters a year
D. a few meters a month
10. A long elastic band is used to try to pull a brick across a table. When the tension is big enough the brick suddenly moves. This demonstration shows that Earthquakes are
