Biology vocab 6-3/random stuff/foldable questions

Question 1

polar molecule

Answer 1

molecules that have an uneven distribution of charges (oppositely charged regions)

Question 2

mixture definition

Answer 2

a combination of 2 or more substances in which each substance retains its individual characteristics and properties

Question 3

solvent

Answer 3

a substance in which another substance is dissolved

Question 4

solute

Answer 4

the substance that is dissolved in the solvent

Question 5

acid definition

Answer 5

substances that release hydrogen ions when dissolved in water

Question 6

base definition

Answer 6

substances that release hydroxide ions when dissolved in water

Question 7

pH

Answer 7

the measure of concentration in H+ in a solution

Question 8

buffer

Answer 8

mixtures that can react with acids or bases to keep the pH within a particular range

Question 9

what is polarity+give an example

Answer 9

the property of having two opposite poles (ends) ex: magnet

Question 10

homogeneous mixture definition

Answer 10

everything will appear the same throughout

Question 11

what are the 2 parts of a solution

Answer 11

a solute and a solvent

Question 12

heterogeneous mixtures definition

Answer 12

everything will appear different throughout

Question 13

polar molecules will…

Answer 13

always attract other polar molecules

Question 14

polar will…

Answer 14

repel non-polar

Question 15

mixtures are…

Answer 15

physically combined, so they can be physically separated

Question 16

3 exs. of homogeneous mixture

Answer 16

koolaid,water, soda

Question 17

whats another name for a homogeneous mixture

Answer 17

solution

Question 18

is water a polar molecule? describe how water will act with other polar molecules

Answer 18

yes, water will attract other polar molecules

Question 19

what are solutions

Answer 19

homogeneous mixtures formed when a solute is dissolved in a solvent

Question 20

3 exs. of heterogeneous mixtures

Answer 20

blood, salad, sand

Question 21

what happens to the H+ ion and OH- ion when you move them from 14-0 on the pH scale

Answer 21

the number of OH- will decrease and the number of H+ will increase from 0-14

Question 22

compare and contrast solutions and suspensions

Answer 22

solutions are a homogeneous mixture while suspensions are heterogeneous

Question 23

the stronger the acid the more…

Answer 23

H+ are released

Question 24

the stronger the base the more…

Answer 24

OH- are released

Question 25

how does water help maintain homeostasis

Answer 25

sweat, blood

Question 26

why is baking soda basic

Answer 26

it raises pH

Question 27

why don’t polar and non-polar molecules attract

Answer 27

the polar molecules have a stronger bond, while non-polar molecules have a weak bond

Question 28

give 4 ex. of acids and their pH value

Answer 28

tomatoes (4), rain (5), battery acid (0), lemon juice (2)

Question 29

give 4 ex. of bases and their pH value

Answer 29

sodium hydroxide (-4), sea water (10), baking soda (9), oven cleaner (13)

Question 30

name and describe the 4 macromolecules

Answer 30

carbohydrates provide short term energy and cell structural support, lipids (fats) provide long term energy and barriers for the cell, proteins build and repair cells, make hormones, and provide structural support, and nucleic acids store and transmit genetic information

Question 31

why are steroids important

Answer 31

they help you grow, support homeostasis, and support metabolism

Question 32

what is a nucleotide and name the 3 major units that make them up

Answer 32

it makes up DNA and RNA. Phosphate, nitrogenous base, and ribose sugar