Review for final test! Fall 2023

The half-life of C-14 is 5,730 years. Your sample has 3.125% C-14 left in it. How many half-lives have passed?

The reason why the mass doesn't change but the atomic # goes up by 1 is because:

Electricity is a __________ of CO₂ and photosynthesis is a ___________ of CO₂

The image on the left show forams _______ the K-T boundary. The image on the right shows forams ______ the K-T boundary

The Mesozoic ______ is divided into three ________ (cretaceous, jurassic, triassic):

Which half-life would we have 7.5 grams of the daughter (decayed) element?

The peaks of this graph are:

The __________ is the epoch that describes how human activity has altered the planet.

About 50 mya, the atmospheric Carbon dioxide was the highest in the last 70 mya:

More land mass at the equator leads to a cooler Earth because high temps increase rock weathering which draws CO₂ down

Which of the major mass extinctions that you studied killed off the highest number of species?

Water vapor is the most important greenhouse gas in terms of amplification of the effects of climate change.

The aspect of Earth's orbit that causes seasons is:

The rate from 200-300 is about _____ X slower than the rate of CO₂ increase from 300-400:

The half-life of Sodium-24 is:

Glacial and interglacial periods over the last 2 million years (this graph is only the last my) are mostly caused by:

The asteroid impact hypothesis became a theory based on:

You have 10% of remaining C-14 in a sample. How old is the sample?

What are the two factors that affect Earth's climate?

What would happen to temperatures if rock weathering & mineralization were removed from the geologic carbon cycle?

The x-axis is foram species below and above the K-T boundary. What can you conclude from this figure?

Carbon dioxide and temperature are unrelated.

Milankovich cycles have been causing glacial and interglacial periods by:

In the last 70 my, temperature was the highest:

According to Milankovich cycles, we should be entering a: