What is the half-life of iodine-131?

• 32 days
• 8 days
• 16 days
• 24 days

• LAYER 1
• LAYER 3
• LAYER 4
• LAYER 6

Which of the following describes a group of living things that is no longer living.

• fossil
• extinct
• mold
• cast

states that the geologic feature which cuts another is the younger of the two features

• law of horizontality
• cross cutting relationships
• law of superposition
• uniformitarianism

Connect points of equal elevation, and are drawn at specific intervals

• index contours
• reference contours
• topographic contours
• contour lines

Identify the type of front that is shown in the image.

• Occluded Front
• Cold Front
• Stationary Front
• Warm Front

What is the difference between an isotherm and an isobar?

• An isotherm shows air pressure and an isobar shows temperature 
• They both show types of precipitation you can expect in your area 
• An isotherm shows temperature and an isobar shows air pressure
• A high pressure area will bring nice weather while a low pressure area brings storms 

At 30°S 135°E, what continent would you be located in?

• Australia
• Africa
• Europe
• South America

What is the standard interval or spacing between isobars? 

• 2
• 4
• 5
• 10

What do the v-shaped contour lines represent?

• mountains
• steep areas
• gradual areas
• rivers