let’s round the numbers

Let’s Round the NumbersLet’s Round the Numbers

Take these numbers and round them to the Take these numbers and round them to the nearest hundred million.nearest hundred million.

China - 1,273,111,290China - 1,273,111,290

Hundred million place

United States - United States - 278,058,881278,058,881

≈ 1,300,000,000

India - 1,029,991,145India - 1,029,991,145

Hundred million place

≈ 1,000,000,000

Hundred million place

≈ 300,000,000

More Rounding!More Rounding!

Then round these numbers to the nearest Then round these numbers to the nearest million.million.

China - 9,326,410 sq kmChina - 9,326,410 sq km

United States - 9,158,960 sq kmUnited States - 9,158,960 sq km

Millions place

Millions place

Millions place

≈ 9,000,000 sq km

≈ 9,000,000 sq km

≈ 3,000,000 sq kmIndia – 2,973,190 sq kmIndia – 2,973,190 sq km

How many people per candy?How many people per candy? Now count the number of candies that Now count the number of candies that

you have in the China pile. How many you have in the China pile. How many people are represented by each candy?people are represented by each candy?

Example: If you have 50 candies in the China pile Example: If you have 50 candies in the China pile and there are 1,300,000,000 people in China, then:and there are 1,300,000,000 people in China, then:

1,300,000,00050

2

-10 300

6,000,000

Now you can do the same with the United States Now you can do the same with the United States numbers!numbers!

This means with 50 candies each candy represents 26,000,000 people.

-300 0

• The perimeter of the soccer field measures 105’ x 90’. There is a 27’ x 9’ box in front of the goalie’s net in which only the goalie may stand. What is the total area of the part of the field in which all players are allowed to move?

12’ 9’27’

105’

90’

Room to Run

First, calculate the total area: 90 ft. x 105 ft = ?

12’ 9’27’

105’

90’

Room to Run

Next, calculate the area of one goalie box: 27 ft. x 9 ft. = ?

How can you determine the answer using these results?

Where does the haze come from?

• Heavy traffic on freeways• Smokestacks from factories and refineries

The first major U.S. cities

What do all of these cities have in common?

DP-4.0

BOSTON

BALTIMORE

PHILADELPHIA

NEW YORK

CHARLESTON

NEW ORLEANS

Solar radiation passes through the clear atmosphere. Most is absorbed by the earth’s surface and warms it. But some solar radiation is reflected by the earth and the atmosphere.

Global Warming and Pollution

Global Warming and PollutionInfrared radiation is emitted from the earth’s surface. Some of it passes through the atmosphere, and some is absorbed and re-emitted in all directions by greenhouse gas molecules, water, and carbon dioxide. The effect of this is to warm the earth’s surface and the lower atmosphere.

As a fire burns, several chemical reactions take place. In one of them, carbon atoms (C) from the fuel bond with oxygen molecules (O2) to form carbon dioxide (CO2). When there is limited oxygen, carbon begins bonding with single oxygen atoms to form carbon monoxide (CO).

Carbon Monoxide

RR-23.0

O2

O2

O2

OO O

OO

OO2

O2O2

C

O2

CC

CCC C C CRR-24.0

C

Viral Superhighways

• Some of our nerve cells are very long. The nerve cells from our feet to our spinal cord are around a meter in length.

RR-56.0

• Nerve cells contain microtubules that extend along the entire length of the nerve cell.

Viral Superhighways

RR-56.1

What’s In A Plot?

The Rising Action is the series of events (conflict) that lead up to the climax.

The Climax is the most intense part of the story where the main action occurs.

Falling Action includes all the events that occur after or as a result of the climax.

The Resolution is the closing of the story where loose ends are tied up.

The Exposition is the start of the story, the situation before the action starts and includes setting.

Exposition

Rising Action

Climax

Falling Action

Resolution

DP-59.3

Catholics and Protestants

• In 1834, about 80% of the Irish people belonged to the Catholic Church, while 18% were Anglicans or Presbyterians.

DP-133.0

Catholics and Protestants

• The Scots and English were Protestants.

DP-133.0

Catholics and Protestants

• The Catholics and Protestants in Ireland were often in violent conflict.

DP-133.0

Immigrants from France

NEW SPAIN

ENGLISH CLAIM

ENGLISH COLONIES

NEW SPAIN

NEW FRANCE

• The French explored and claimed a large area of the future United States.

• What other parts of North America did the French claim?

• Individuals and groups from France also immigrated to the U.S.

DP-107.0

Nice Save!

• A set of triplets, Roxy, Moxie and Jen-Jen, take turns playing goalie position on K.T.’s soccer team. Each has kept track of her saves over the course of the season, and they decide to compare their average number of saves to see who has the best record.

• Roxy averaged 4 1/16 saves per game, Moxie averaged 4.083, and Jen-Jen averaged 4.83838383 saves per game.

• Which triplet has the best record?