living organisms Flashcards

1
Q

living organisms are composed of about how many chemical elements?

A

25 chemical elements

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2
Q

what are living organisms composed of?

A

matter

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3
Q

what is matter?

A

anything that occupies space and has mass (weight)

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4
Q

what are the 3 states of matter?

A

solid, liquid, gas

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5
Q

what are the fundamental units of matter?

A

elements

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6
Q

what are elements?

A

elements are composed of atoms that are subdivided into subatomic particles

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7
Q

matter is composed of … elements

A

chemical

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8
Q

what is a substance that cannot be broken down to other substances?

A

an element

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9
Q

each element is represented by what?

A

letters

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10
Q

there are 6 elements that frequently occur in organic matter. what are those 6 elements?

A

carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulphur (CHNOP)

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11
Q

life requires how many essential elements? some of which are called..

A

life requires 25 essential elements, some of which are called trace elements

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