The Museum of West Namibia wants to know if the Mesosaurus fossils were separated in one or a series of quick, huge movements, or if the separation was the result of slow and steady movement. Given what you learned today, which of the claims below seems best supported? Why? What questions do you still have? Write your response to these questions below, using words from the Word Bank. Claim 1: The South American Plate and African Plate moved apart suddenly.

Claim 2: The South American Plate and African Plate moved apart gradually.

Word Bank

mantle

outer layer

pattern

plate

plate boundary

rate

the displacement produced by the body.  

the amount of force subjected to the body.  

the angle between the direction of force and displacement

im sorry i dont know

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.