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Artyom0805 [142]
3 years ago
15

Is this statement true or false? Ore is a chunk of rock that contains a large amount of metal. Most minerals come from rock that

is mined from the Earth's crust. True false
Chemistry
1 answer:
Sliva [168]3 years ago
6 0

True

True

Explanation:

An ore is piece of rock that contains a large amount of metal. Ores are rocks that are made up of aggregate of metalliferous minerals and gangues from minerals can be won at profit.

Ores are vital for economic and political consideration. They are natural sources of resources which can be found in geological formations.

Ores are often used anonymously with aggregates of metals and gangues from which the metals can be won.

Examples are hematite, ore of iron

                       Cassiterite ore of tin

Most minerals comes from rocks that are mined from the earth crust is true.

A rock can be defined as an aggregate of minerals. In the formation of a rock, several minerals combine together naturally to form the mass. The bulk of the minerals on the earth crust are referred to as silicate minerals. Some rock forming minerals are:

  • Olivine
  • Pyroxene
  • Quartz
  • feldspars

Some rocks are also mined for their economic purposes and they are called ores.

Learn more:

Rocks brainly.com/question/2817889

#learnwithBrainly

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As the temperature of a gas increases, _____. (select all the options that correctly complete the sentence.)
weeeeeb [17]

As the temperature of a gas increases, the average kinetic energy of the gas particles increases and the average speed of a gas particle increases.

According to the kinetic theory of gases, all gases are made of microscopic molecules that move in straight lines until they bump into another gas molecule or object. This transfer of energy causes molecules to move around faster and bump into each other more.

Kinetic energy is proportional to the speed of the molecules. As the speed of the colliding molecules increases, so does the total kinetic energy of all the gas molecules. It's pretty difficult to measure the speed of an individual gas molecule.

Instead, temperature can be used as a measure of the average kinetic energy of all the molecules in the gas. As the gas molecules gain energy and move faster, the temperature goes up. This is why Amy feels warmer!

To determine the average kinetic energy of gas molecules, we need to know the temperature of the gas, the universal gas constant (R), and Avogadro's number (NA).

Learn more about kinetic theory of gases here : brainly.com/question/11067389

#SPJ4

5 0
2 years ago
In the pie chart below, which of the following represents the amount of Earth's water located in the oceans?
Andrew [12]

Answer:

D. 97%

Explanation:

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Deforestation, intensive agriculture, and drought can result in a condition called
vredina [299]

Answer:

D

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Human activities that contribute to desertification include the expansion and intensive use of agricultural lands, poor irrigation practices, deforestation, and overgrazing. ... Some meteorologists and soil scientists measure the impacts and length of a drought to determine if it is an example of desertification.

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Plz HELP ITS SCIENCE!
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Cell wall:
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