Science Homework Help

1.The difference in average global temperature between today and the last ice-age, 10,000 years ago, is only about 5^oC. So why should we be concerned about the documented 0.8^oC degree change instigated by humans?

2.What is the biological interaction between birds and insects like the pear thrip and the forest tent caterpillar? How will climate change leave their habitats vulnerable?

3.What is your largest source of emissions (prior to COVID 19)?

4.What steps can you take to decrease your carbon emissions (after COVID 19)?

5.Interpreting data: A 2010 study compared the amount of CO₂ emitted when a locally grown broccoli was delivered to Virginia Tech University vs. the amount of CO₂ emitted when broccoli from California was delivered there. The Californian broccoli was delivered in shipments containing 768 lbs of broccoli, in a trailer that traveled 2,786 miles. Trailer fuel efficiency is 5 miles per gallon, and 20 lbs of CO₂ are released per gallon of fuel burned. The local broccoli was delivered in shipments of 587 lbs of broccoli in a van that traveled 19.1 miles. Van fuel efficiency is 16 miles per gallon, and 20 lbs of CO₂ are released per gallon of fuel burned.

6.Complete the following table to determine the CO₂ emissions associated with delivering 1 lb of non local broccoli. Show work below table!

Source of Broccoli	Miles per shipment	Gallons of Fuel burned per shipment	CO2 Released per shipment (lbs)	CO2 Released per lb of broccoli delivered
Non-local	2786	5 miles	20lbs
Local	19.1	16 miles	20lbs

7.If global warming causes Artic Sea ice to melt, what will be the effect on sea levels in a low lying region like Houston? Think of three ways (discussed in chapter) life might change in our area with regards to this change in biome.

8.Fossil fuels are most immediately derived from ___________

a.Organic Molecules

b.Carbon dioxide

c.Methane

d.Melting ice caps

e.Photosynthesis

9.Which of the following organisms contribute to reducing atmospheric CO₂?

a.Maple trees

b.Some algae

c.Polar bears

d.All of the above

e.Two of the above

10. What is the greenhouse effect? How does it directly affect your life?