Science Test 2-21-24 Flashcards

1
Q

Elements

A

contains just one type of atom
Ex. cole and copper

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2
Q

Compounds

A

contains two or more different atoms
Ex. Wate, sugar, salt

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3
Q

Mixtures

A

Contains two or more different substances that are physically or chemically not combined
Ex. jellybeans

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4
Q

Carbohydrate

A

Ex. Sugar and starch

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5
Q

Lipid

A

fats, oils, and grease

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6
Q

Protein:

A

Amino Acids

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7
Q

Nucleic acid:

A

DNA and RNA

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8
Q

In order for it to be in one of the categories what does it have to have?

A

Carbon

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9
Q

How is water important to the function of cells? (3 things)

A

Most chemical reactions within cells could not take place without water
Helps cells keep size and shape
Helps keep the temperature of cells from changing rapidly

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10
Q

How do most small molecules cross the cell membrane?

A

Selectively permeable

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11
Q

Passive Transport:

A

movement of dissolved materials through a cell membrane without using cellular energy

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12
Q

Active transport:

A

movement of materials through a cell membrane using cellular energy

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13
Q

Selectively Permeable

A

only certain things can go in and out of the cell

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14
Q

What does it keep out

A

Keeps harmful materials out of the cell
Lets water, nutrients into the cell
Waste products leave the cell

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