boundary

1 : to bring clearly before the mind : present a book which represents the character of early America. 2 : to serve as a sign or symbol of the flag represents our country. 3 : to portray or exhibit in art : depict.

If someone such as a lawyer or a politician represents a person, a group of people, or a place, they act on behalf of that person, group, or place. If you represent a person or group at an official event, you go there on their behalf.

As verbs the difference between represent and represents is that represent is to present again or anew; to present by means of something standing in the place of; to exhibit the counterpart or image of; to typify while represents is (represent).

Answer. Explanation: The boundaries between plates are indicated with three symbols. The lines with gray shading indicate divergent plate boundaries, the “triangle” symbol represents convergent plate boundaries and the single line with or without the “T” indicates transform plate boundaries.

Juan de Fuca Plate

You mention the Nazca plate as not being particularly “minor”, and indeed there is an intermediate grouping, normally said to comprise the Arabian Plate, Caribbean Plate, Cocos Plate, Juan de Fuca Plate, Nazca Plate, Philippine Sea Plate, and the Scotia Plate. This is easy to remember because they also number seven!

There are seven major plates: African, Antarctic, Eurasian, Indo-Australian, North American, Pacific and South American. The Hawaiian Islands were created by the Pacific Plate, which is the world’s largest plate at 39,768,522 square miles.

There may be scientific consensus as to whether such plates should be considered distinct portions of the crust; thus, new research could change this list.

• African Plate.
• Antarctic Plate.
• Australian Plate.
• Caribbean Plate.
• Cocos Plate.
• Eurasian Plate.
• Nazca Plate.
• North American Plate.

Primary plates

• African plate.
• Antarctic plate.
• Indo-Australian plate.
• North American plate.
• Pacific plate.
• South American plate.
• Eurasian plate.

There are three kinds of plate tectonic boundaries: divergent, convergent, and transform plate boundaries. This image shows the three main types of plate boundaries: divergent, convergent, and transform.

seventy tectonic plates

125km thick

Orogeny also takes place at such boundaries. Tectonic plates are defined as major and minor plates depending on their size. There are a total of seven major tectonic plates which cover nearly 95% of the Earth’s surface.

That plates are moving today can be demonstrated from earthquakes. The sense of relative movement of the earth on either side of seismically active faults can be determined from focal mechanisms – any for big-shallow earthquakes, can be directly measured from ground motion.

The forces that drive Plate Tectonics include:

• Convection in the Mantle (heat driven)
• Ridge push (gravitational force at the spreading ridges)
• Slab pull (gravitational force in subduction zones)

There are essentially two main types of forces that are thought to influence plate motion: friction and gravity. Basal drag (friction): Plate motion driven by friction between the convection currents in the asthenosphere and the more rigid overlying lithosphere.

gravity

“ridge push” The lithosphere thickens with distance (and time) away from the midocean ridge. The result of this thickenning with distance from the ridge is that the lithosphere/asthenosphere boundary slopes away from the ridge. The weight of the lithosphere on this sloping surface produces a downslope force.