(8 Mix)8th Grade

8th GradePreAlgebra

100

Find x of the following equation:

    30=-3x + 15

x= -5

200

Solve for x

−8(−8x − 6) = −6x − 22

x = -1

300

Solve the equation for x

20/3 = x + 19/6

 ^{7/2 or 3.5}

400

Simplify 

x⁴² * x¹⁷ 

x⁵⁹

500

what is the slope?

y = 50 + 4x

m = 4

600

Kristin spent $131 on shirts. Fancy shirts cost $28 and plain shirts cost $15. If she bought a total of 7 then how many of each kind did she buy?

2 fancy shirts and 5 plain shirts

700

Solve the system of equations using substitution

y = 6x − 14

y = −8x

(1, −8)

8th Grade Science

100

True or False: you will weigh less on the moon.

True 

200

What is Newtons First Law of Motion?

An object at rest stays at rest, an object in motion stays in motion.

300

What is the name of the invisible force field that surrounds the earth?

Magnetosphere

400

What is the Hawaiian name for the Moon 

Mahina 

500

Which planet has the greatest mass?

Jupiter

600

What is the invisible force that comes from the center of the Earth.

Gravity 

700

 Newton's Third Law of Motion

For every action there is an equal and opposite reaction.

8th GradeSocial Studies

100

What year was the Declaration of Independence Filed.

1776

200

What was the purpose of the Abolitionist Movement?

To end slavery.

300

What was one of the main causes of the civil war?

Slavery

400

What does our first amendment give us the right to?

Free Speech

500

What were some of immediate impacts of the civil war?

The Union's victory ensured that slavery would be illegal in the US forever, 3 amendments were made to the Constitution

Over 600,000 people died

Made the nation truly ONE NATION for the first time

600

How many Amendments were in the original Bill of Rights?

10

700

Name 1 impacts of Westward Expansion

1. The fight over slavery grew

2. Native Americans were removed from their homelands

3. Borders expanded to reach from coast to coast

4. Migration brought an abundance of population and trade growth

5. Mexican American War

8th GradeGeometry

100

How many degrees do the angles of a triangle add up to?

180

200

Explain the pythagorean theorem (give the equation, shape involved and how it is proved)

a² + b² = c²

right triangle 

it is proved when both sides of the equations equal each other (balance). 

300

Using the pythagorean theorem solve the equation for the missing side length.

a² + 13² = 313

a = 12

400

In which geometric transformation does the shape stay similar rather than congruent?

Dilation

500

What does it mean when a shape "translates"  given the rule (x + 2, y - 1).

to slide right two and down 1

600

is this shape a right triangle? why or why not?

7² + 9² = 225

no because a² + b² does not equal c²

700

A shaped "flipped" over the y axis. What kind of transformation is this and did the shape stay congruent?

Reflection and yes 

8th GradeData, Measurement, Statistics

100

State the formula for an area of a circle

a = pir²

200

in a two way table, the total amount of 8th graders was 500 and the total amount of 7th graders was 450. Of the students surveyed 30 7th graders and 45 8th graders stated they enjoyed apples better than oranges. What was the relative frequency of 7th graders  to the total population surveyed who enjoyed apples more than oranges?

Round your answer to the nearest percent.

3%

300

 Find the volume of a cone with a radius of 5 cm and a height of 10 cm . use 3.14 for pi.

(round to the nearest tenth)

261.7 cm³

400

What is the formula for volume of a cone?

V= 1/3 (pi) r squared h

500

A square has a perimeter of 40 feet. What is its area?

100 square feet 

600

A cylinder has a radius of 10 cm and a height of 20 cm. What is its volume?

6,280 cubic centimeters

700

What is the formula to find the volume of a sphere?

4/3 pi r cubed