Task 1

If a rock sample initially contains 100 grams of a radioactive isotope with a half-life of 5,000 years, how much will remain after 10,000 years?

• 25 grams

• 50 grams

• 75 grams

• 100 grams

What element is extremely rare in rocks but common in most meteorites?

• Iron

• Oxygen

• Aluminum

• Iridium

Which of the following elements cycle through biosphere after being released during a natural breakdown of certain types of minerals, for example, this element is used in small scale gold mining to extract gold from ore.

• As

• Pb

• Hg

• Cd

What large crater was found in 1900 along Mexico's Yucatan peninsula and is associated with a significant mass extinction event approximately 66 million years ago?

• Meteor Crater

• Chicxulub Crater

• Apolaki Caldera

• Kaali Crater

Which of the following geological resources is most susceptible to the tragedy of the commons?

• Private mineral deposits

• Public geological heritage sites

• The Earth's lithosphere

• Volcanic eruptions

If the probability of an earthquake to occur is rare and its severity of consequence is medium, how would you classify the risk?

• Low

• Medium

• High

• Very high

What rare sulfide mineral is dimorphous and polymorphs with enargite?

• Luzonite

• Bornite

• Chalcopyrite

• Tennantite

If the probability of flooding to occur is near certain and the severity of consequence is high, how would you classify the risk?

• Low

• Medium

• High

• Very high

Which of the following is a sporadic process?

• Flooding

• Uplifting

• Erosion

• Deposition

What do you call when the earth is farthest to the sun?

• Aphelion

• Perihelion

• Proxima Centauri

• Equinox