GENERAL SCIENCES EARTH SCIENCE #DRILLS

The only liquid layer of the solid earth is the

• crust

• mantle

• outer core

• inner core

The study of earthquakes and seismic waves that move through and around the earth.

• oceanology

• meteorology

• seismology

• hydrology

The branch of astronomy that deals with the nature and origin of the physical features of the moon.

• astrology

• selenology

• pedology

• limnology

Layer composed mainly of ferro-magnesium silicates. It is about 2900 km thick, and is separated into the upper and lower layers. This is where most of the internal heat of the Earth is located. What is this layer?

• crust

• mantle

• outer core

• inner core

The boundary between the crust and the mantle in the earth. This is a depth where seismic waves change velocity and there is also a change in chemical composition.

• Lithosphere

• Moho

• Guttenberg

• asthenosphere

According to Wegener, about 300 million years ago, claimed that the continents were once connected in a giant land mass called a supercontinent, which means all of the earth. The other term for this is

• tectonic plates

• continent

• planet

• Pangaea

Most rocks are very hard. However, a very small amout of water can cause them to break. When water seeps into cracks and freezes it then expands. This powerful force can increase the size of cracks. Over time the repeated action of water can break rocks apart. Eventually, pieces of rock break off creating screed. What kind of weathering occured?

• chemical weathering

• freeze-thaw

• biological weathering

• exfoliation

Geologists are generally have agreed that Earth is

• about 100 million years old

• about 4.55 billion years old

• about 6,000 years old

• as old as the bacteria

Which is the smallest geologic time scale?

• eon

• period

• era

• epoch

What seismic wave cannot travel through liquids?

• P wave

• S wave

• love wave

• surface wave