7th grade

literal equations

100

3x+y=z 

solve for x

x=(z-y)/3

200

ab+d=c+e 

solve for a

a=(c+e-d)/b

300

F=(9/5)C+32

solve for C

C=(f-32)*(5/9)

400

A= h*(a+b)/2

solve for h

h=2A/(a+b)

500

V=LWH/3

solve for W

W=3V/LH

percent change

100

The cost of a ticket to the museum went up 30%. If the old price was $20, what is the new price?

$26

200

The original price of a shirt was $50, it is marked down to $30. What percent-off is the shirt?

40%

300

Max had 150 Pokemon cards. Now he has 300. What was the percent increase in his number of Pokemon cards?

100%

400

We used to have 9 planets in the solar system. Then they took Pluto away. What was the percent decrease in the number of planets?

11%

500

Jessica scored 15 goals in soccer last season. This season she scored 20% more goals. How many goals did she score this season?

18 goals

westward expansion

100

this major building project made it possible for people and goods to travel across the entire country in just a week

Transcontinental Railroad

200

This Act was passed in 1862 and offered citizens 160 acres of land on the frontier

The Homestead Act

300

Native Americans were forced to live here when the US government stole their land

Reservations

400

This invention made it possible to move people and goods up and down river quickly

Steamboat

500

This western territory was claimed by both the US and Britain. Ultimately the US got the land south of the 49th parallel and Britain got the land north of it. 

Oregon

biomes

100

this is the largest biome on earth

ocean

200

these two biomes receive the least precipitation

desert and tundra

300

this biome is very bio-diverse and can be found near the equator

tropical rainforest

400

this biome is where buffalo would live

grassland

500

biotic factors in a biome

living things

cycles of matter

100

water falling back to the earth out of clouds, in any form, is called this

precipitation

200

this gas makes up 78% of the air we breathe

nitrogen

300

dew forming on grass is an example of this part of the water cycle

condensation

400

This is another name for the evaporation of water through the leaves of a plant

Transpiration

500

This plant process removes carbon from the air

photosynthesis