Science Test 2-21-24

Question 1

Elements

Answer 1

contains just one type of atom
Ex. cole and copper

Question 2

Compounds

Answer 2

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

Question 3

Mixtures

Answer 3

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

Question 4

Carbohydrate

Answer 4

Ex. Sugar and starch

Question 5

Lipid

Answer 5

fats, oils, and grease

Question 6

Protein:

Answer 6

Amino Acids

Question 7

Nucleic acid:

Answer 7

DNA and RNA

Question 8

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

Answer 8

Carbon

Question 9

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

Answer 9

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

Question 10

How do most small molecules cross the cell membrane?

Answer 10

Selectively permeable

Question 11

Passive Transport:

Answer 11

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

Question 12

Active transport:

Answer 12

movement of materials through a cell membrane using cellular energy

Question 13

Selectively Permeable

Answer 13

only certain things can go in and out of the cell

Question 14

What does it keep out

Answer 14

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