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1

# of mass extinctions

5

2

percentage of extinct species

99.9

3

no longer in existance

extinct

4

what do paleontologist study

fossils

5

What causes a mass extinction

Climate Change, VolCANOES, astroids

6

Evidence of volcanoes/astroids

igneous rocks/creators

7

positive charge

proton

8

negative charge

electron

9

no charge

neutron

10

What does Carbon 12 mean

Carbon has a mass number of 12

11

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

Alpha particle

12

an electron 0/-1e

Beta particle

13

Energy 0/0 weird Y

Gamma particle

14

the isotope you have before the nuclear decay

parent

15

the isotope you have after the nuclear decay

daughter

16

strongest particle

gamma

17

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

half-life

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.

law of superposition

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).

relative dating

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.

radiometric

21

crieteria for a good index fossil

distinctive, widespread, abundant and limited in geologic time.

22

the idea that all continents were once connected

Pangea

23

Evidance for Pangea

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

24

Divergent

25

____________>

covergent

26

When plates slide pass each other

Transform

27

a place where an organism lives

habitat

28

a role an organism has in nature

niche