1. Bell work #61
1. ________ are inorganic, solid materials found in nature.
Minerals
2. A mineral is called a(n) _______ if it contains enough of a useful substance that can be sold for a profit.
Ore
3. What kind of rocks form when melted rock material from inside the Earth cools?
Igneous rocks
4. _______ in the melted rock material determine the color of the resulting rock.
chemicals
5. Chalk and coal are examples of what?
Organic rocks

2. #62 What are the three main classes of rocks?
Igneous, sedimentary and metamorphic
2. What is the most abundant fossil fuel in the world?
Coal
3. Coal provides ______ percent of the energy used worldwide. 25
______ _______ is energy derived from burning organic material such as wood, alcohol, and garbage.
Biomass energy
What is the process of using old materials to make new ones?
Recycling

3. #63
What is a vertical circulation in the ocean that brings deep, cold water to the ocean surface?
Upwelling
_______ means that more of the illuminated half of the Moon can be seen each night.
Waxing
3. What is the difference between the level of the ocean at high tide and low tide?
Tidal range
What is the human perception of the frequency of sound?
Pitch
5. ______ is the human perception of the intensity of sound waves.
Loudness

4. #64
______ rocks form when melted rock material from inside Earth cools.
Igneous
2. Coal and chalk belong to which group of sedimentary rocks?
Organic rocks
3. What kind of sedimentary rocks form when seawater, loaded with minerals, evaporates?
Chemical rocks
4. It can take _______ of years for rocks to change.
Millions
5. What does the word metamorphic mean?
change of form

5. #65 What three types of rock can form metamorphic rocks?
igneous, sedimentary, and metamorphic
2. ______ rocks have visible layers or elongated grains of minerals.
Foliated
______ rocks do not have distinct layers or bands.
Nonfoliated
What describes how different kinds of rock are related to one another and how rocks change from one type to another?
The rock cycle
Is ice a mineral?
Yes

6. #66 What is the primary use of coal? To produce electricity
2. What is the most abundant fossil fuel in the world?
Coal
3. Dead plant material accumulates in swamps and eventually forms a layer of what?
Peat
4. Heat released in nuclear reactors produces _____, which in turn is used to produce electricity?
Steam
5. Nuclear energy from fission uses ______ as a fuel.
Uranium - 235

7. #67
Coal, natural gas, oil, and nuclear fission are all what kind of energy sources?
Nonrenewable
2. What are the four stages of coal formation?
peat, lignite, bituminous coal, and anthracite coal
What are two common methods that are used to extract coal reserves?
Strip mining and underground mining
What kind of plant converts water into usable energy?
Hydroelectric plant
______ energy is energy from the sun.
Solar

8. #68 What two words is the term biomass derived from?
Biological and mass
2. A _________ is a deposit of useful minerals.
Mineral resource
What helps to reduce the demand for new mineral resources?
Recycling
Which of the following is an inexhaustible resource: coal, nuclear fission, oil, or solar?
Solar
What is the name of a sedimentary rock that formed from decayed plant matter?
Coal

9. #69 Varieties of which mineral are most abundant in Earth’s crust?
Feldspar
2. What is the color of powdered mineral?
Streak
_______ and ______ change sediment into sedimentary rock.
Compaction and cementation
What limit is passed when earthquakes occur?
Elastic Limit
What are the slowest seismic waves?
Surface waves

10. #70 What kind of earthquake waves stretch and compress rocks? Primary
2. The _________ of the lines on a seismogram can be used to determine an earthquake’s magnitude.
Height
_________ waves stop when they hit the outer core.
Secondary waves
What are the fastest moving seismic waves?
Primary waves
Stresses on rock are created by ______ ______.
Plate movement