Because they didn’t go extinct at the same time
Answer:
butyne
Explanation:
alkane, alkene, and alkyne are all examples of hydrocarbons.
butyne = alkyne
One of the defining features of an element is it's density. Calculate that and verify which substance this would be.
p=m/v
p=25g/2.38 cm^3
p=10.50 g/cm^3
Density of Silver is 10.5 g/cm^3
Hope I helped :)
The early hypothesis of Alfred wegener was based on observations that suggested continents were once joined together. later the theory of plate tectonics explained why large pieces of earths surfaces moves around and how many of earths features form.
but i this case c. continental drift and plate tectonics
