Geography

Fieldwork and skills, Year 8: more practice

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GeographyFieldwork and skills, Year 8: more practice
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Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator
Answer in your head…On a choropleth map shaded in one colour, what does a darker shade normally show?
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★ KS3-GEOG-FIE-0032Front

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator

A higher value

HintThe key links each shade to a range of values.

The whyChoropleth maps use a graded colour scheme, usually light for low values and dark for high ones, so the pattern is visible at a glance.

★ KS3-GEOG-FIE-0032Back

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator
Answer in your head…A choropleth map shades each region by its total population, and a huge, almost empty region looks darkest. What should be shaded instead to avoid this trap?
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★ KS3-GEOG-FIE-0033Front

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator

Population density (people per square kilometre)

HintTotals depend on how big the region is.

The whyDensity divides the number of people by the area, so large and small regions can be compared fairly. Choropleth maps work best with rates, ratios or densities.

★ KS3-GEOG-FIE-0033Back

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator
Answer in your head…A choropleth map gives one shade to a whole region. What detail does this hide?
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★ KS3-GEOG-FIE-0034Front

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator

Variation within the region

HintEach area gets a single colour.

The whyA region shaded dark may contain both very high and very low places. The map shows the average, not the differences inside.

★ KS3-GEOG-FIE-0034Back

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator
Answer in your head…A choropleth key has 4 equal-width classes covering values from 0 to 100. What is the width of each class? (number only)
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★ KS3-GEOG-FIE-0035Front

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator

25

HintShare the full range equally between the classes.

The why100 ÷ 4 = 25, so the classes are 0 to 25, 25 to 50, 50 to 75 and 75 to 100.

★ KS3-GEOG-FIE-0035Back

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator
Answer in your head…Why do choropleth maps usually use one colour that goes from light to dark, rather than a mix of unrelated colours?
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★ KS3-GEOG-FIE-0036Front

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator

The order of the shades makes higher and lower values easy to read

HintThink about reading the map without checking the key every time.

The whyA single-colour range has a natural order. Mixed colours have no obvious order, so the reader must keep looking back at the key.

★ KS3-GEOG-FIE-0036Back

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator
Answer in your head…A GIS has a flood-risk layer and a population layer. What question can overlaying them answer?
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★ KS3-GEOG-FIE-0037Front

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator

How many people live in areas at risk of flooding

HintThink about what two sets of information show together.

The whyOverlaying means viewing layers on top of each other. Patterns that are hidden in one layer on its own appear where layers meet.

★ KS3-GEOG-FIE-0037Back

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator
Answer in your head…What does GIS stand for?
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★ KS3-GEOG-FIE-0038Front

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator

Geographic Information System

HintThe last word is about how the data are organised.

The whyA GIS stores, layers and analyses location data on a computer, such as roads, rivers, schools and flood zones.

★ KS3-GEOG-FIE-0038Back

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator
Answer in your head…What is one advantage of a GIS over a paper map when new data arrive?
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★ KS3-GEOG-FIE-0039Front

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator

A layer can be updated without redrawing the whole map

HintThink about how a paper map gets out of date.

The whyThe roads layer can be replaced with a newer version while the rivers layer stays the same, and layers can be switched on or off.

★ KS3-GEOG-FIE-0039Back

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator
Answer in your head…A GIS layer shows lakes as shaded shapes with edges. Is this vector or raster data?
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★ KS3-GEOG-FIE-0040Front

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator

Vector

HintA raster layer is a grid of pixels.

The whyPoints, lines and polygons are all vector data. A lake drawn as a polygon is vector; a satellite photo is raster.

★ KS3-GEOG-FIE-0040Back

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator
Answer in your head…A council overlays a layer showing homes on a layer showing existing libraries to site a new library. Which area is the best choice: A many homes close to a library, B many homes far from any library, or C few homes far from any library?
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★ KS3-GEOG-FIE-0041Front

Geography · Fieldwork and skills, Year 8: more practiceProfessor Mercator

B: many homes far from any library

HintCombine the two layers rather than reading each alone.

The whyOverlaying the layers shows crowded areas that are far from any library. This is how a 'where should it go?' question is answered.

★ KS3-GEOG-FIE-0041Back

Fieldwork and skills, Year 8: more practice

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