Author Question: At some Cretaceous-Paleogene boundary sites, the impact hypothesis is supported by the existence of ... (Read 136 times)

Chloeellawright · **on:** Jul 13, 2018

At some Cretaceous-Paleogene boundary sites, the impact hypothesis is supported by the existence of ____.
A)high concentrations of platinum
B)shock-metamorphosed quartz grains
C)dinosaur fossils
D)the absence of dinosaur fossils
E)high concentrations of volcanic rocks

Question 2

What happens when a wave enters shallow water?
A)Wavelength decreases, wave height increases, and wave speed increases.
B)Wavelength decreases, wave height decreases, and wave speed decreases.
C)Wavelength increases, wave height increases, and wave speed decreases.
D)Wavelength increases, wave height increases, and wave speed increases.
E)Wavelength decreases, wave height increases, and wave speed decreases.