jueves, 14 de septiembre de 2017


Fossil fuels are derived from which of the following sources?
A: organic matter trapped in sedimentary rock
B: nonorganic matter trapped in metamorphic rock
C: organic matter trapped in igneous rock
D: organic matter on the crust's surface

Coal, a common fossil fuel, is formed from which of the following types of organic matter?
A: freshwater algae
B: bodies of dead animals
C: marine organisms
D: tree trunks, leaves, and freshwater plants

Oil and gas are mainly derived from which of the following sources?
A: trees and larger plants
B: phytoplanktonic material found in marine basins
C: freshwater algae
D: dead animals

What is one difference between a common organic fuel such as wood, and a fossil fuel?
A: Wood burns more slowly
B: Fossil fuels burn faster
C: Fossil fuels make more efficient fuels
D: Wood is in higher demand

Why do fossil fuels generate more power than wood for use in machines, for example?
A: Fossil fuels have a higher concentration of carbon and hydrogen
B: Fossil fuels are drier
C: Fossil fuels are easier to light
D: Fossil fuels are easier to transport

The quality of coal, called its rank, is a measure of which of the following characteristics?
A: amount of carbon in the coal
B: amount of oxygen in the coal
C: how black it is
D: how hard it is

Natural gas is composed mainly of which type of gas?
A: propane
B: methane
C: butane
D: ethane

What is the one continent on Earth where coal is not found?
A: Africa
B: North America
C: Australia
D: Antarctica

The greatest concentration of oil is found in which of the regions of the world given below?
A: North America
B: South America
C: the Middle East
D: Europe

Most of the world's oil is found in sedimentary rock that is of what age?
A: Younger than 200 years
B: younger than 200 million years
C: older than 200 million years
D: older than 300 million years

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