Identical rock types, identical fossils, and very similar mountain ranges are found on different continents that are separated by a wide ocean. Which of these best explains these observations?
Organisms traveled between these continents on land bridges.
D The same forces erode mountains in different locations.
These continents were joined together at one time in the past
Some rock types are very common and are found everywhere.

Martha is writing a report on the landfill gases near her house. fill in the blanks to complete her report. use this table for calculations: residence time (t) mass (m) methane 8 years 4.3 × 1015 g landfill methane humans produce a huge amount of waste every day. landfills were designed to combat this large amount of waste by accumulating and disposing it. organic waste from landfills undergoes decomposition in the absence of oxygen, producing gases. methane gas is a large percentage of the gases emitted from landfills. if we consider a landfill a reservoir, the flow rate of methane is . methane has a longer residence time than co2, and it is a greenhouse gas that traps heat very effectively. therefore, methane the temperature of the reservoir.