8th Grade Earth Science Test Review

The ability of a liquid to flow through a substance is

Scientists chose where units of geologic time began and ended based on the appearance or disappearance of life.

Nuclear energy is energy that's generated from nuclear fission heating water and the steam turning turbines.

Fossil fuels are considered nonrenewable resources because of

The earth provides humans with an unlimited amount of fossil fuels. They are considered renewable resources.

What is a fossil?

Step 2 for how petroleum (oil)  is formed?

Identify this Era: Humans live in the Era

Which factor below is effected if it's hot/ dry & less vegetation which may affect the growth of plants and animals.

When a rock has pore spaces that water can enter through, it's considered

Which fossils fuel come from living organisms that died millions of years ago?

Step 1 for how petroleum (oil)  is formed?

Oxygen levels change as you go up a mountain.Which factor explains the above statement?

According to the law of superposition and the relative dating of rock layers, the deeper we dig,

Water found above Earth's surface.

Flooding, snow melting too quickly, and drought are all factors that could NEGATIVELY affect aquifers.

Which is not a reason for why freshwater is considered a limited resource?

Why was gravel the best choice for a rock layer when building your aquifer?

Eras in the geologic time scale are divided into

The processes that change the Earth's surface can happen quickly and slowly.

Step 3 for how petroleum (oil)  is formed?

What type of event usually marks the end of an era?

The earth is ___ years old.

A group of nonrenewable resources, called ___ include coal, oil, and natural gas.

What percent of Geologic Earth history occurred in the Precambrian era?

The Paleozoic, Mesozoic, and Cenozoic are divisions in the geologic time scale called

The geologic time scale is a record of

Which statement explains why not every area in the USA has copper?

Water that collects or flows beneath Earth's surface in the soil or in the pores and cracks of rocks.

The disappearance of a species is called

An underground layer of permeable rock that can hold groundwater or allow it to flow through.

Step 4 for how petroleum (oil)  is formed?

Different types of soil can be more fertile than others. Which factor explains the above statement?