Bio ESS

How old is our Earth

• 45 Billion Years

• 4.5 Billion years

• 45 million years

• We really don't know

What did Earth look like when it was first formed

• One Large landmass surrounded by water

• All water no land

• Similar to today

• Mostly molten rock and no water

• We have no way of knowing

What was the composition of the early atmosphere?

• Carbon Dioxide

• Water Vapor

• Sulfur Dioxide

• All of the above

What were some components of the early atmosphere (how it developed, was it protected, what elements were important and why?)

How did the oceans form?

• Volcanic gases

• Comets and Asteroids

• The lunar impact

• All of the above

List key events in the evolution of species on Earth and when did they occur?

(3850 maya, 1500 maya, 700 maya, 530 maya, 400 maya, 350 maya, 225 maya, 65 maya, 130,000 years ago)

How do we know when the first photosyntheic plants appeared?

• Found oxygen in the ozone (UV)

• Rock records w/oxygen found in them

• We don't

• Fossils

How does redox chemistry aid in cellular respiration?

• Hypertonic and hypotonic solutions

• Rock records w/oxygen

• molecule is oxidized and acts as an electron donor

• transfer bond of energy in the form of electrons from glucose to electron carriers

Electromagnetic radiation

• all of the frequencies or wavelengts of electromagnetic radiation (light

• radian energy released by all matter

• energy released during movement

• built up energy waiting to be used

How is carbon removed from the atmosphere on a seasonal timescale?

• Through the reaction C6H12O6 + 6O2 --> 6H20 + ATP

• Through the ocean: colder water absorbs more CO2 - hotter water doesn't absorb as much

• Over time earth is able to cool down, allowing water vapor to condense

• Trough phtoplankton: they fix carbon from the atmosphere to photensythesize with