Loading...

PPT – INTRODUCTION TO EARTH SCIENCE PowerPoint presentation | free to download - id: 7862ca-MDZjO

The Adobe Flash plugin is needed to view this content

INTRODUCTION TO EARTH SCIENCE

- Welcome

What is Earth Science?

- Earth Science is the study of our planet, its

changing systems and its place in the universe. - Includes using standard methods to make

observations, as well as recording and analyzing

data to draw conclusions.

Branches of Earth Science

- Geology-the study of rock materials and how the

solid earth changes. - Meteorology-the study of the changing conditions

of the atmosphere. - Astronomy-the study of earths motions and the

nature of other objects in space

Observation and Measurement

- Observation-information received directly from

any of our five senses. - In some cases instruments extend our senses.
- Measurements are observations made using an

instrument. They are expressed with numbers and

units.

Scientific Notation

- This helps scientists express very large or very

small numbers easily. - Example
- M x 10n
- M is a number from 1.0 to 9.9
- N is an exponent. If this is negative the number

is a decimal.

Scientific Notation

- Write 27,508 in scientific notation.
- Determine M by moving the decimal point so that

only one non-zero digit is to the left of the

decimal. - 2.7508
- Determine n by counting the number of places the

decimal point has been moved. - 2.7508 x 10 4

Observations and Inferences

- Observations are used to develop conclusions or

inferences in cases where observations are

difficult or impossible.

Observation Inference

Pebbles are rounded. These pebbles traveled down a stream.

Density

- The ratio of mass (quantity of matter in object)

to volume (how much space it takes up) of an

object. - No matter how much of a substance you have the

density will always remain the same. (Gold always

19.3 g/cm3). - Also, if you cut in half density remains the same.

Graphs-present data visually

- Coordinate system (x-axis and y-axis).
- Line graph-shows change over time.
- Bar graph-shows comparison.
- Pie chart-shows how something is divided.