Unit 2 Test

Question 1

of mass extinctions

Answer 1

5

Question 2

percentage of extinct species

Answer 2

99.9

Question 3

no longer in existance

Answer 3

extinct

Question 4

what do paleontologist study

Answer 4

fossils

Question 5

What causes a mass extinction

Answer 5

Climate Change, VolCANOES, astroids

Question 6

Evidence of volcanoes/astroids

Answer 6

igneous rocks/creators

Question 7

positive charge

Answer 7

proton

Question 8

negative charge

Answer 8

electron

Question 9

no charge

Answer 9

neutron

Question 10

What does Carbon 12 mean

Answer 10

Carbon has a mass number of 12

Question 11

helium nucleus (2 protons and electrons) 4/2He

Answer 11

Alpha particle

Question 12

an electron 0/-1e

Answer 12

Beta particle

Question 13

Energy 0/0 weird Y

Answer 13

Gamma particle

Question 14

the isotope you have before the nuclear decay

Answer 14

parent

Question 15

the isotope you have after the nuclear decay

Answer 15

daughter

Question 16

strongest particle

Answer 16

gamma

Question 17

time required for a particle to reduce to half its initial value.

Answer 17

half-life

Question 18

basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom, each layer being younger than the one beneath it and older than the one above it.

Answer 18

law of superposition

Question 19

the science of determining the relative order of past events (i.e., the age of an object in comparison to another), without necessarily determining their absolute age, (i.e. estimated age).

Answer 19

relative dating

Question 20

a technique used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when exactly they were formed.

Answer 20

radiometric

Question 21

crieteria for a good index fossil

Answer 21

distinctive, widespread, abundant and limited in geologic time.

Question 22

the idea that all continents were once connected

Answer 22

Pangea

Question 23

Evidance for Pangea

Answer 23

1. Fit of the Continents
2. Past Climate Belts and Distribution of Fossils
3. Matching Rock Types

Answer 24

Divergent

Question 25

____________>

Answer 25

covergent

Question 26

When plates slide pass each other

Answer 26

Transform

Question 27

a place where an organism lives

Answer 27

habitat

Question 28

a role an organism has in nature

Answer 28

niche