100 points if you answer these 7 questions: 1.Match these items.
the first scientist to suggest the theory of plate tectonics
1. plate tectonics theory that all continents were combined into one land mass
2. Alfred Wegener splits oceanic ridges
3. rift valley

2.The most prominent topographical feature of the ocean discovered in the 1960s was:

a. seamounts
b. subduction zones
c. volcanic activity at the ocean bottom
d. a mountain ridge which circles the earth

3.Choose all the right answers.

The two kinds of plates in the plate tectonics theory are the:

Wegener
continental
sea floor
rift

4.Sections in the crust bend sharply to form mountains as a result of:

a. weathering
b. folding
c. erosion
d. volcanoes

5.The theory which explains the movement of the earth's crust is called plate .
a. rifting
b. tectonics
c. division

6.The focus of an earthquake is the:

a. center of the earthquake
b. point on the surface directly above the earthquake
c. point underground where the earthquake starts
d. direction the seismic waves travel

7.Which of the following is an example of physical weathering?

a. stalactites and stalagmites
b. sand blowing against a rock
c. flood waters carrying away soil
d. glaciers moving rocks and boulders

#1. B. Alfred Wegener

#2. C. Volcanic activity at the ocean bottom.

#3. B, C. Continental, Sea floor (oceanic).

#4. B. Folding

#5. B. Tectonics

#6. C. Point underground where the earthquake starts

#7. C. Flood waters carrying away soil

Explanation:

#1. Alfred Lothar Wegener was a German polar researcher, geophysicist and meteorologist. During his lifetime he was primarily known for his achievements in meteorology and as a pioneer of polar research, and is also known as the father of plate tectonics.

#2. The most prominent feature of ocean topography discovered in the 1960s was: Volcanic activity at the ocean bottom. The continents have always been in their current positions.

#3. Tectonic plates are composed of oceanic lithosphere and thicker continental lithosphere, each topped by its own kind of crust. The two types of tectonic plates are continental and oceanic tectonic plates.

#4. Tremendous pushing forces exerted by two of Earth's plates moving together squeezed rock layers from opposite sides. This caused the rock layers to buckle and fold, forming folded mountains. Folded mountains are mountains formed by the folding of rock layers caused by compression forces.

#5. Plate tectonics is the scientific theory explaining the movement of the earth's crust. It is widely accepted by scientists today. Recall that both continental landmasses and the ocean floor are part of the earth's crust, and that the crust is broken into individual pieces called tectonic plates.

#6. The hypocenter is the point within the earth where an earthquake rupture starts. The epicenter is the point directly above it at the surface of the Earth. Also commonly termed the focus. See also epicenter.

#7. This process is known as erosion. In earth science, erosion is the action of surface processes that removes soil, rock, or dissolved material from one location on the Earth's crust, and then transports it to another location.

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a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation:

yup its correct its: c) b b