8th Grade Vocab List #3

Question 1

the time required for a quantity to reduce to half of its initial value

Answer 1

Half-Life

Question 2

the process of determining an age on a specified chronology in archaeology and geology and live in harsh environments

Answer 2

Absolute Dating

Question 3

the science of determining the relative order of past events, without necessarily determining their absolute age comparing dates

Answer 3

Relative Dating

Question 4

the group consisting of all modern and extinct Great Apes

Answer 4

Hominid

Question 5

a member of the group of mammals which includes humans, monkeys, and apes. that dont have taoil and stand on two legs

Answer 5

Primate

Question 6

a very long span of geologic time; the second longest portions of geological time

Answer 6

Era

Question 7

unit of geological time during which a rock series is deposited or i a specific time in an area with certain features

Answer 7

Epoch

Question 8

the science of naming, describing and classifying organisms

Answer 8

Taxonomy

Question 9

a group of micro-organisms that are similar to, but evolutionarily distinct from bacteria; oldest living organisms on earth harsh environments

Answer 9

Archeabacteria

Question 10

any eukaryotic organism that is not an animal, plant, or fungus

Answer 10

Protist

Question 11

any member of the group of eukaryotic organisms that includes microorganisms such as yeasts and molds; can be single celled or very complex multicellular organisms

Answer 11

Fungus

Question 12

organisms whose cells contain a nucleus and other membrane-bound organelles

Answer 12

Eukaryote

Question 13

organisms whose cells lack a nucleus and other organelles

Answer 13

Prokaryote

Question 14

asexual reproduction by a separation of the body into two new bodies combine for two

Answer 14

Binary Fission

Question 15

a phylum of gram-negative bacteria that obtain energy via photosynthesis; oxygenic phototrophs ue photsosynethis

Answer 15

cyanobacteria

Question 16

the reproduction of viruses using a host cell to manufacture more viruses; the viruses then burst out of the cell

Answer 16

lytic cycle

Question 17

are photosynthetic organisms that possess photosynthetic pigments such as chlorophyll use photsonsteheiss

Answer 17

algae

Question 18

a unicellular eukaryotic alga characterized by having a siliceous covering and a symmetrical body algae use

Answer 18

diatom

Question 19

a hairlike appendage that protrudes from certain plant and animal sperm cells, and from a wide range of microorganisms to provide motility; whip-like appendages used for locomotion tail

Answer 19

flagella

Question 20

small, slender, hair-like structures present on the surface of all mammalian cells; play a major role in locomotion

Answer 20

cilia

Question 21

a long, branching, filamentous structure of a fungus, oomycete, or actinobacterium; the mass of the mycelium that gives fungal growth its characteristic “cottony” feel its a filamnet

Answer 21

hypha

Question 22

a cell that certain fungi, plants (moss, ferns), and bacteria produce; a unit of sexual (in fungi) or asexual reproduction that may be adapted for dispersal and for survival

Answer 22

spore

Question 23

a root-like structure of a fungus consisting of a mass of branching, thread-like hyphae MASS

Answer 23

mycelium

Question 24

an asexual reproduction method in which a new organism develops from a bud of an existing organism

Answer 24

budding

Question 25

a hormone that lowers the level of glucose (a type of sugar) in the blood

Answer 25

insulin