Answer:
it is actually 75% I Don't know why it is not in the options
The correct answer is A. silica.
The amount of silica found in the magma determines the viscosity. The higher the silica in magma, the higher the viscosity of a magma. So the correct answer is silica. It is not among the other choices.
A downtrend in communicable diseases A focus on prevention
Reduced neonatal mortality rates
It's bounded in San Juan which is in Puerto Rico
hope this helps :)
Answer:
The plates will collide in 50,000,000 years.
Explanation:
The tectonic plates are constantly moving. Their movement results in some of them to collide, thus to form convergent plate boundaries. In this case, we have two plates that are relatively far away and the movement is about the average. In order to find out how many years will be needed for the plates to collide we need to:
- convert the km into cm
- divide the distance (in cm) between the plates with the rate of movement of the plate
1 km = 100,000 cm
100,000 x 1,500 = 150,000,000 cm
150,000,000 / 3 = 50,000,000 years
We get a result of 50 million years, meaning the plates will collide in this much time, which in geological terms is actually not that long.