Module #5

Question 1

matter

Answer 1

anything that has mass and takes up space

Question 2

Model

Answer 2

an explanation or representation of something that cannot be seen

Question 3

element

Answer 3

a collection of atoms that all have the same number of protons

Question 4

molecules

Answer 4

chemicals that result from atoms linking together

Question 5

physical change

Answer 5

a change hat affects the appearance but not the chemical makeup of a substance

Question 6

chemical change

Answer 6

a change that alters the makeup of the elements or molecules of a substance

Question 7

phase

Answer 7

one of three forms- solid liquid or gas- which every substance is capable of attaining

Question 8

diffusion

Answer 8

the random motion of molecules from a area of high concentration to an area of low concentration

Question 9

concentration

Answer 9

a measurement of ow much solute exists within a certain volume of solvent

Question 10

semipermeable membrane

Answer 10

a membrane that allows some molecules to pass through but does not allow other molecules to pas through

Question 11

osmosis

Answer 11

the tendency of a solvent to travel across a semipermeable membrane into areas of higher solute concentration

Question 12

organic molecule

Answer 12

a molecule that contains only carbon and any of the following hydrogen oxygen nitrogen sulfur and or phosphorous

Question 13

biosynthesis

Answer 13

the process by which living org produce larger molecules from smaller ones

Question 14

isomers

Answer 14

two different molecules that have the same chemical formula

Question 15

monosaccharides

Answer 15

simple carbohydrates that contain 3 to 10 carbon atoms

Question 16

disaccharides

Answer 16

carbohydrates that are made up of two monosaccharides

Question 17

plysaccharides

Answer 17

carbohydrates that are made up of more that two monosaccharides

Question 18

dehydration reaction

Answer 18

a chemical reaction in which molecules combine by removing water

Question 19

hydrolysis

Answer 19

breaking down complex molecules by the chemical addition of water saturated fat

Question 20

hydrophobic

Answer 20

lacking any affinity to water

Question 21

saturated fat

Answer 21

lipid made from fatty acids that have no double bonds between carbon atoms

Question 22

unsaturated fat

Answer 22

a lipid made from fatty acids that have at least one double bond between carbon atoms

Question 23

peptide bond

Answer 23

a bond that links amino acids together in a protein

Question 24

hydrogen bond

Answer 24

a strong attraction between hydrogen atoms and certain other atoms (usually oxygen or nitrogen ) in specific molecules