Poster Project

Samantha Oliphant, Sarah Mercer, Chris Fish, Xander Neagle

Samantha's Questions

1. How does Earth's Atmosphere protect and nurture life?

Earth's Atmosphere protects life by absorbing dangerous parts of the Electromagnetic Spectrum known as ultraviolet radiation. It also keeps Earth's surface warm.

2. The Hydrosphere includes what areas on Earth?

It includes all the liquid water in the oceans, rivers, lakes, clouds, and also the soil and groundwater. Solid water in snow and ice is found in the colder regions of the world.

3. How does the Geosphere and the Lithosphere differ?

The Geosphere includes the solid Earth portion of Earth's Systems. Rocks and soil are at the surface. The Lithosphere only includes Earth's crust.

Chris' Questions

8. What is one scientific explanation for the origin of our oceans, and what is the evidence? Earth cooled, H2O produced by outgassing could exist exist as liquid forming oceans

9.Why couldn’t there have been oceans during Earth’s earliest years? too much heat, evaporates the water

10. What evidence is there that comets were not big contributors to the Earth’s oceans? earth water would have be more like comets make up

11. Describe two processes that produce oxygen on our planet.

photochemical dissociation- breaks up water using uv radiation photosynthesis plants take in CO2 and release oxygen

Xander's Questions

12. What processes consume oxygen on our planet? Chemical weathering, animal respiration and the burning of fossil fuels.

13. What evidence is there that the amount of O2 in Earth’s atmosphere has increased with time? Evidence that proves the amount of O2 in Earth's atmosphere has increased over time would be Branded Iron Formation. Iron is very reactive to oxygen and scientist can see the effects on iron from oxygen over time.

14. If Earth’s CO2 was 1,000 times higher in the primordial atmosphere, where did it all go? H2O formed oceans and CO2 dissolved into the oceans and precipitated out as carbonates.

15.Why hasn’t N2 (atmospheric nitrogen) changed like CO2 levels have? N2 is chemically inactive and stayed in the atmosphere.