Scientists can't tell that an earthquake is a foreshock until the larger earthquake happens. The largest, main earthquake is called the mainshock. Mainshocks always have aftershocks that follow. These are smaller earthquakes that occur afterwards in the same place as the mainshock.
C
Since the components in a mixture are NOT chemically bound, you cannot use chemical methods to separate them lest you’ll counter-intuitively mix them chemically to form compounds. Rather physical methods are used to separate the components.
Explanation:
Air is made of a mixture of gases like Nitrogen, Oxygen and Carbon dioxide and particles like dust particles and water vapor. It is a homogeneous mixture because the components are well mixed up proportionately through out the mixture. The different components air can be separated using their different densities or melting and boiling points.
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The answer to this question is:
A. Barley and wheat were both civilizations' main crops
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Coal/ fossil fuels is most likely the answer.
The correct answer for the question that is being presented above is this one: "d. all of the above." Modernization changed agriculture since the Great Leap Forward by having no more communal farms, increased production, <span>contract responsibility system.</span>
Here are the following choices:
<span>a.
no more communal farms
</span>b. increased production<span>
c.
contract responsibility system
d.
all of the above</span>
