BIO ch.2

Question 1

what is the difference between a chemical and physical change

Answer 1

A physical change is a change that changes the shape or size of the object but it is still that same thing. A chemical change is a change that changes the object it’s self and makes a new prouduct.

Question 2

what is the smallest part of matter

Answer 2

atom

Question 3

what are the parts of the atom

Answer 3

electrons,proton,neutron

Question 4

Atomic number

Answer 4

how many electrons are on the outer shell of the atom

Question 5

Atomic mass

Answer 5

how much the nucleus weighs

Question 6

carbohydrate

Answer 6

pasta,noodles,rice

Question 7

lipids

Answer 7

fats,oils,waxes

Question 8

proteins

Answer 8

meat, jello, amino acids

Question 9

nucleic acids

Answer 9

DNA,RNA

Question 10

elements

Answer 10

the things that make up everything in the world

Question 11

compounds

Answer 11

the combination of two or more elements

Question 12

organic compounds

Answer 12

any compound that has carbon

Question 13

ions

Answer 13

that have a charge from giving or taking electrons

Question 14

isotopes

Answer 14

same element but with different number of neutrons

Question 15

chemical bonds

Answer 15

a bond that is caused by a chemical reaction

Question 16

chemical reaction

Answer 16

a reaction that changes the whole thing and makes it a new element or compound

Question 17

enzyme

Answer 17

substance produced by living organism

Question 18

metabolism

Answer 18

helps digest food and the things in your stomach

Question 19

homeostasis

Answer 19

breaks up the bonds

Question 20

solution

Answer 20

a combination of stuff

Question 21

acid

Answer 21

is a molecule or ion capable of donating a proton

Question 22

base

Answer 22

the main building block of the thing

Question 23

pH scale

Answer 23

measures how acidic or basic a substance is.

Question 24

Organic molecules

Answer 24

are the molecules of life and are built around chains of carbon atoms that are often quite long.

Question 25

inorganic molecules

Answer 25

norganic molecules are generally simple and are not normally found in living things.