Carbon Cycle and Conservation of Mass

What is the objective of the Quick Lab: Investigating Cycling of Matter in Burning Wood?

• To observe the process of wood burning

• To understand the conservation of mass in chemical reactions

• To measure the mass of kindling wood

• Both A and B.

Is the mass of the wood conserved? If yes, what law explains why the mass of the wood is conserved even though it seems to disappear? If no, justify your response.

• Yes, Law of Conservation of Mass

• No, mass is lost

• Yes, Law of Energy Conservation

• No, energy is lost.

How does the diagram show the effects of photosynthesis?

What is one effect of humans burning biomass on the carbon cycle?

• Decrease in CO2 levels

• Increase in CO2 levels

• No change in CO2 levels

• Decrease in oxygen levels.

Fill in the blank: Without decisive changes to reduce emissions, Earth's temperature is projected to increase by ___ to 5°C by the year 2100.

• 1

• 2

• 3

• 4