Do Now: Write three pieces of evidence that told us that the earth was round.

Slides:

Advertisements

Similar presentations

Chapter: Earth’s Place in Space

Advertisements

THIS IS Density Observation, Inference, & Classification Size and Shape of Earth GraphingESRTGrab Bag.

How a scientific proof works.

Topic II: Measuring the Earth

Earth’s Shape, Dimensions and Internal Heat & Density

Measuring the Earths Dimensions

 SHAPE.  The earth is spherical in shape.  It is not flat as people used to believe.  The earth has a special shape called geoid. SIZE. The earth.

The Planet Earth.

Models and Dimensions of Earth

UNIT 2 Earth Dimensions.

A survey of the solar system Michael Balogh The solar system (PHYS 275)

EARTH’S, FORMATION SHAPE, DIMENSIONS AND HEAT CHAPTER 4.1.

4/23/2017 What is Earth’s shape?

9/23/14 Aim: What is the true size and shape of the earth? Do Now: 1.How would my neighbor’s dog barking be considered a pollutant? 2. What are the only.

EARTH’S, FORMATION SHAPE, DIMENSIONS AND HEAT CHAPTER 4.1.

Earth’s Motion and Seasons

THE EARTH IN MOTION.

Circumference and Shape of the Earth Measure angle to star from two locations. Calculate arc deg and circumference. Or Simply watch a ship disappear over.

What is the true size of the Earth?

Mrs. Degl1 It appears that Earth is a perfect circle, however, it is not!!!!! It is really an OBLATE SPHEROID. What does that mean?????????

GEOG 268: Cartography Ohio Northern University Winter Hill 200.

Size of the Earth How a scientific proof works.. How big is Earth? Having established its shape, what is Earth’s size? Having established its shape, what.

Do Now: 1) What are the 3 spheres of Earth? 2) Which layer is most dense? 3) We are known as the _____ planet because we are covered by 71% of water.

Topic 2: Measuring Earth  How can we determine the shape of the Earth?  What evidence do we have about the shape of the Earth?  What are the parts or.

Earth’s Shape and Size Unit 1. The Earth’s Shape Earth’s shape is nearly spherical (Oblate Spheroid) It is flattened at the poles and bulging at the equator.

Earth’s Size and Shape Measuring the Earth.

Measuring the Earth  Evidence for Earth’s shape  Ships appear to sink as they go over the horizon.  The highest part of the ship is the last to go out.

The Composition and Layers of the Physical Earth

Measuring Earth Midterm Review Topics: Earth’s true shape & evidence Positions on Earth (Latitude, Longitude, Angle of Polaris) Time Zones.

Chapter 2.1 Earth: a Unique Planet (Goal 1). Three Reasons the Earth is Unique … It is the only known planet with liquid surface water. It is the only.

Erastosthenes: Measuring the Size of the Earth Scott Morrison 8.282J / J 5 Feb 2009.

Earth’s Dimensions and Navigation

Aim: How do we know the true shape of Earth? Do Now: Describe the shape of Earth using your own terms.

Earth’s Shape, Size and Composition

SCIENCE 6 TOPIC 5. What does the word infer mean?

Earth’s Shape and Coordinate Systems. Shape of Earth ► Oblate Spheroid – flattened sphere  Flatter at the poles  Bulges at the equator ► Diagram of.

Longitude & latitude Time.. SHAPE Shape – The Earth is not a perfect sphere. The Earth is an oblate spheroid. –This means it is slightly flattened at.

A common misconception about lines of latitude is that they were simply defined as the intersection of different angles with the surface of the Earth,

No matter what kind of map is made, some portion of the Earth’s surface will always look either too small, too big, or out of place. Mapmakers have, however,

Unit Two Measuring The Earth I. The Earth’s Shape A. Evidence the earth is round: Ships gradually disappear over the horizon from the bottom up when.

Longitude & latitude Time.

New Unit: Earth Dimensions & Mapping What is Earth’s True Shape?

Time and Diurnal Motion

What evidence told scientists earth has a curved surface?

Shape and Size of the earth

What IS the shape of the Earth?

Aim: Describe Earth’s shape, actions and spheres

If you had to prove the earth was round how could you do it

Review Session Chapter 1 – Planet Earth.

Aim: How do we know the true shape of Earth?

MAPPING THE EARTH.

Page 1 Topic 2 Measuring Earth Set up your Note Packet.

Aim: How can we use models to show Earth’s shape? (Topic III Notes #1)

SWBAT Determine how ancient humans discovered the Earth’s true shape.

Earth's Dimensions Profiles Topographic Maps Latitude Longitude

Topic II Measuring Earth.

Earth’s Shape.

LO: students will be able to explain why scientists use models to study scientific phenomena. S2a, S4a What’s this? Hint: I’m not a skeleton!

Shape of the Earth.

UNIT 1 PART 2 Mapping the Earth.

Origins of Cosmology Friday, September 26.

Earth’s Motion, Shape and Spheres

Today’s Big Objective Describe 3 ancient pieces of evidence of a round earth.

Do Now: What is the shape of the Earth? How do you know?

Earth Dimensions Allen, Spring '04.

1-1 The Shape of the Earth Unit 1: Planet Earth September 24, 2011

Presentation transcript:

Do Now: Write three pieces of evidence that told us that the earth was round.

Aim: How do we measure the shape and size of the earth? Topic: Unit 1 Main Idea: Eratosthenes’s Method

1) What is the true shape of the earth? The earth is a slightly flattened sphere called an “oblate spheroid”.

 Observations of the shape of the horizon, how ships disappear and lunar eclipses. 2) How do we know about the shape of the earth?

 He was able to calculate the circumference (distance around) the earth with great accuracy. 3) What did Eratosthenes discover about the earth?

 The height of the sun decreases as you move away from the equator. 4) What happens to the angle of the sun as you travel north or south of the equator?

 Angle of the sun = distance 360 o circumference or Circumference= (360 )(distance) angle 5) What formula did he use?

 24,901 mi – 24,662 mi X ,901 mi  239mi X ,901 mi  0.96% !!! 6) Eratosthenes calculated the circumference of the earth to be 24,662 km while it is actually 24,901 mi. What was his percent deviation?

 (360 o )(2 km) (9 o )  720 o. km 9 o  80 km Summary: A new planet is discovered and measurements using Eratosthenes’s method are as follows: distance (S) = 2 km angle (L) = 9 degrees. Calculate the circumference of the new planet.