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olga nikolaevna [1]
3 years ago
9

What are plains (structure of earth)​

Biology
1 answer:
Karolina [17]3 years ago
7 0

Answer:

They are flat lands of grass with little to no curve or steeps.

Explanation:

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Which cells are required to process and present antigens from foreign material as the initial step in the immune response?
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How would the body most likely respond to the condition illustrated
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8 0
3 years ago
How many chemicals in cigarettes are known or suspected to cause cancer?
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5 0
3 years ago
Does the size of the particles change as a substance changes state
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Ok, particle is not a very nice word, no real sense of size associated with it
it can be a group of molecules like a speck of sand
referring to the molecules themselves
or refering to the atoms that make up the molecule

now in terms of phase change,
if we consider a speck- a group of molecules- then solids will expand when heated, however this definition falls flat in terms of phase change

ok, how about molecules, as molecules undergo phase change, the molecules in relation to each other will move apart from one another. Solid- molecules are bonded, Liquids- molecules are close and flow around each other, Gas- molecules are a significant distance from one another. But the increase in size when you heat up a molecule, i would have to say yes. adding heat increases energy which increases molecular vibration which would probably  increase the overall average size to some unnoticeable degree.

now standalone atoms are just atoms, if you want to consider the electron cloud as size, then heating it up would negligibly cause the outer move outward. but it really depends on the scale of the question
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