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Obs./Inf. Activity
Data gathering
Branches of Geo.
Classroom map
Topographic map
Mapping
Pg. 2
Pg. 3
Pg. 4
Pg. 5
Pg. 6
Pg. 7
Maps – What is this of?
Know now???
Play this????
Mapping
Pg. 7
Cartography-
the science of map making.
Cartographers are scientists
who make maps.
They collect data from a lot of
sources.
Remote sensing -
—gathering and analyzing
information about an
object without physically
touching it.
Satellite Image of Las Vegas
Parts of a map: 1. Compass - directions
2. Legend(key)=explanation of symbols
3. Scale(the relationship between the
distance on the map and the actual
distance)
Types of maps:
1. Road maps -
2. Weather maps -
3. Satellite maps-
4. Geologic maps- rocks, faults and folds
Topographic Maps-
show the surface
shape(topography)
of the land.
Topographic Maps- Use lines called contour lines to
connect areas of equal
elevation(height above
sea level).
Isogram(Isoline)
a line on a map that represents
constant or equal values.
Contour interval-
Relief-
the difference in elevation
between contour lines.
the difference in elevation
between the highest and lowest
point on the map.
lines pointing inward indicate a
decrease in elevation=going down!
• What is the contour interval?
• What is the relief?
• Gradient(Slope) = height difference
horizontal difference
(rise over run in math terms)
• Do topography lab and then answer the
questions
1. Fill the box up to the 1 cm mark with colored water.
2. Put the lid on the box.
3. On the lid, draw the line created by the water
touching the volcanic island.
4. Remove the lid.
5. Repeat for the 2cm, 3cm and all the other marks up
to 7cm.
6. Copy the map you made on the model lid on your
paper. Make sure you add elevation labels to each
line and show depressions where appropriate.
7. Clean up- wipe off lid, dump water into the sink and
rinse it out. Leave on counter with beaker.
On the back of your paper:
H
Analysis Questions
1. What are the lines you drew called?
2. Using the cm numbers, what is the contour interval of
this map?
3. What is the relief of this map?
4. As the slope on the volcano gets steeper, what
happens to the distance between the contour lines?
5. What errors could your group have made in the
construction of your contour map?
6. The actual contour interval is 250m. Re-label your
contour lines to reflect this.
7. What is the highest elevation on your map?
8. Label on your map where there might be a stream.
Why did you pick this location?