Unit: Remote Sensing/ Topography

Question 1

What is remote sensing?

Answer 1

Process of gathering data about Earth using instruments mounted on satellites, airplanes, or ships

Question 2

What are the five types of Remote sensing?

Answer 2

Landsat, Topex, Poseidon, sea bean, GPS, GIS

Question 3

What does Radar stand for?

Answer 3

Radio and detection and ranging

Question 4

What does sonar stand for?

Answer 4

Sound of navigation and ranging

Question 5

What type of waves do radar use

Answer 5

They are electromagnetic waves because they are diminished in water, mainly used for atmospheric and ground observations

Question 6

What type of waves do Sonar use?

Answer 6

Acoustic because it travels easily through water- used for navigation and measurements under water

Question 7

What do landsat satellites do?

Answer 7

They record reflected wavelengths of energy from Earth’s surface. These include wavelengths of visible and infrared radiation

Question 8

How does landsat satellite work??

Answer 8

It is equipped with a moving mirror that scans the surface. The mirror has rows of detectors that measure the intensity of energy received from Earth

Question 9

What is Topex Poseidon? What does it stand for?

Answer 9

Is a satellite designed to measure ocean surface topography with accuracy… Stands for topographic experiment

Question 10

How does Topex Poseidon Work?

Answer 10

Uses radar high frequency signals that are transmitted from the satellite to the surface of the ocean, a receiving device and pick up the returning echo as it is reflected off the water

Question 11

What is Sea Beam?

Answer 11

Used to map the ocean floor used on a ship and not a satellite

Question 12

How does sea beam work?

Answer 12

A sound wave is sent from a ship toward the ocean floor a receiving device and picks up the returning echo. When it bounces off the ocean floor computers on the ship. Calculate the distance from the ship to the ocean floor using the speed of sound in the water

Question 13

What is GPS stand for

Answer 13

Global positioning system

Question 14

What is GPS

Answer 14

Is a satellite navigation system that allows users to locate their approximate position on Earth. They’re about 30 satellites orbiting the earth for use

Question 15

What are uses for GPS?

Answer 15

Navigation for airplanes and ships, Detecting earthquakes create maps and track wildlife, Locate lost people and find program destinations

Question 16

What is GIS?

Answer 16

Geographic information system

Question 17

How does GIS work?

Answer 17

Uses a database of information gathered by scientists, professionals and students to create layers or themes of information that makes a comprehensive map

Question 18

What are uses of gis?

Answer 18

Scientists use GIS technology for tracking volcano, mapping to track pollution

Question 19

What are 4 important rules to reading topographic map?

Answer 19

1. The closer the lines, the steeper the slope
2. Contour line spend when they cross a river
3. Contour lines form closed loops are extend to the edge of a map
4. Sometimes lines are drawn with small marks or hatcher’s pointing inward

Question 20

What do closer lines indicate

Answer 20

that the elevation is changing Quickly!

Question 21

What does closer lines mean?

Answer 21

The close of the lines are together the greater the change in elevation

Question 22

What happens when contour lines cross a river?

Answer 22

They bend upstream+ the point is always upstream)

Question 23

How can you find elevation on map?

Answer 23

The highest elevation of a hill you can find can be calculated by the last or highest contour line

Question 24

What are lines with small lines?

Answer 24

Represent a depression or hole ( called hacthers)

Question 25

What is formula for gradient?

Answer 25

Change in elevation over distance

Question 26

What is a field map?

Answer 26

Map that shows the elevation of specific points in an area

Question 27

what is a map?

Answer 27

diagram or representation of and area of land or water that shows the physical features of an area

Question 28

cartography

Answer 28

science of making maps

Question 29

How do we describe location on Earth?

Answer 29

use a coordinate system

Question 30

coordinate uses 2 numbers

Answer 30

1. north/south 2. east/ west

Question 31

latitude

Answer 31

coordinate specifies east/west

Question 32

how do latitude lines run

Answer 32

horizontally

Question 33

center of earth latitude

Answer 33

equator 0 degrees

Question 34

equator splits what?

Answer 34

earth in to 2 halves= Northern/ Southern hemispheres

Question 35

what is highest northern latitude

Answer 35

90 N degress corresponds to north pole

Question 36

what is highest southern latitude?

Answer 36

90 S degrees corresponds with southern pole

Question 37

where is tropic of cancer?

Answer 37

23.5 N degrees

Question 38

where is Tropic of Capricorn?

Answer 38

23.5 S degrees

Question 39

where does the prime meridian run through?

Answer 39

Greenwich, England

Question 40

Where is the international dateline?

Answer 40

exactly opposite of where the prime meridian is

Question 41

what is the international dateline?

Answer 41

where day begins/ends

Question 42

what is celestial navigation

Answer 42

use of stars to navigate

Question 43

Where is polaris?

Answer 43

located directly above north pole; this is a stagnant (90 N)

Question 44

What is altitude of a star

Answer 44

is the angle of the star above the horizon

Question 45

What is zenith?

Answer 45

term used to describe highest point in the sky (is the point directly above you)

Question 46

where can you see polaris?

Answer 46

only in northern hemisphere- is at north pole

Question 47

what are the 5 types of projections

Answer 47

Mercator, conic, topographic, geologic, gnomonic

Question 48

what is a mercator projection?

Answer 48

parallel lines of latitude and longitude

Question 49

How is it used?

Answer 49

navigation of ships and planes

Question 50

what are the distortions

Answer 50

land near poles is distorted

Question 51

What is a conic projection?

Answer 51

made by points and lines from a globe onto a cone where the cone touches the globe at a particular point

Question 52

what are conic projections used for ?

Answer 52

used for road and weather maps

Question 53

Where on conic projections distorted?

Answer 53

the top and bottom are dstorted

Question 54

what are gnomonic projections?

Answer 54

projecting points and lines from a globe onto a piece of paper that touches the globe at a single point.

Question 55

What are gnomonic projections used for?

Answer 55

Great circle routes

Question 56

Where is gnomonic projections distorted?

Answer 56

direction/ distance between landmasses

Question 57

What are Geologic maps?

Answer 57

projections that show the type of rocks below the surface in a given area

Question 58

What are geologic maps' distortions?

Answer 58

depends on type used

Question 59

What are topographic maps?

Answer 59

shows elevation and changes of land in the area

Question 60

How are Topographic maps distorted?

Answer 60

depends on type used

Question 61

What are contour lines?

Answer 61

lines on topographic maps used to show change in elevation; drawn in intervals

Question 62

What is a topographic profile?

Answer 62

picture of what the land would look like from the side, it is a cross section of the land

Question 63

What is a map legend?

Answer 63

explains symbols on the map

Question 64

what is the map scale?

Answer 64

the ratio between distances on a map and actual distances on the surface of Earth

Question 65

What are the 3 types of map scales?

Answer 65

fractional, verbal, graphic

Question 66

verbal scale?

Answer 66

expresses distance as a statement

Question 67

graphic scale?

Answer 67

a line that represents a certain distance

Question 68

fractional scale

Answer 68

expresses distance as a ratio