Pangea, the last supercontinent formed some 360 million years ago by the grouping of all existing continental masses, begins to separate 130 million later, during the transit between the Permian and Triassic, and it does so by fragmenting into two major continents:
One, which begins to drift north and is called Laurasia, and another, which drifts south, called Gondwana. These two great continental masses are separated by the Neotethys ocean.
Laurasia will subsequently fragment and give rise to what will be Eurasia and North America, while the rest of the continents will separate from Gondwana: South America, Africa, Antarctica and Indoaustralia, which in turn will break, giving rise to the Indian and Australian subcontinents.
A major flood in an Asian country leads to disease and starvation. Some say it is due to global warming, others to bad luck. Coordinated efforts by global health agencies, assisted by nongovernmental organizations (NGOs) and individual donors, help get the country back on its feet. What types of cooperation are needed to make all of this happen?
Answer:
.
Explanation:
1. Is there a relationship between the locations of earthquake epicenters, volcanoes, and plate boundaries? If so, describe the relationship. 2. According to the theory of continental drift, all of the world’s continents were once connected as one large landmass and have, over the course of hundreds of millions of years, drifted apart into the positions they occupy today. Do the results of this activity support the theory of continental drift? If so, how? Explain your answer. 3. Why is it easier to predict where an earthquake epicenter will occur than it is to predict when it will occur? Explain. 4. The Richter scale describes how much energy an earthquake releases. With every increase of 1.0 on the scale, 32 times more energy is released. How many times more energy would be released by a quake measuring 2.0 more units on the Richter scale? 5. Why do you think the area around the Pacific Plate is called the Pacific Ring of Fire? 6. The Hawaiian Islands have formed as the Pacific Plate moves northwestward over a hot spot of Earth’s interior that provides magma to form several volcanos. Explain what could happen if the Pacific Plate continues to move. 7. How can volcanic eruptions be predicted?
Answer:1Earthquakes occur along fault lines, which are all the types of plate boundaries.
Volcanoes are located along converging plate boundaries and diverging plate boundarie
2Yes. The reason that earthquakes and volcanoes occur is the plate moving. The magma rises and pushes the
both-side crust. That causes continents moving and volcanoes and earthquakes happen.
3Now people know earthquakes happen along the plate boundaries, so they can predict where it is going to
happening. However, they cannot know when it happens. People cannot predict when the plates are going
to move.
4 64 time more
5There is the area that volcanoes and earthquakes happen usually.6
6Those formed islands are going to keep moving northwesrward and the magma from the hotspot will rise,
cool, and form a new island.
7Before an eruption, magma will rise toward the surface and break the rocks. That causes the hotter surface
and an earthquake. For these two reasons, people can predict volcano eruptions.
Which of the following would best categorize Canada's population?A. evenly spread throughout the country B. concentrated on the West Coast C. concentrated in the north D. concentrated in the south
The light flowing through the surface of a star is related to
Answer: Thermal Equilibrium
Drag words from the left to the correct blanks at the right. You may use the same words more than once. The sum of the number of protons and neutrons in an atom is called the . The number of protons in an atom is called the atom's________ . Each chemical element has a unique_________ . Most hydrogen atoms have only a single proton in their nucleus, so a hydrogen atom that also has one neutron is an_________ of hydrogen. An atom with more electrons than protons has a negative________ .isotopeatomic numberelectric chargeatomic mass number
Answer: Mass number, atomic number, atomic number, isotope, charge
Explanation:
The total sum of the protons and neutrons in the atomic nucleus is called mass number. It is approximately equal to the mass of the atom.
The number of protons that are present in the nucleus of an atom is called atomic number. It is represented by letter Z.
Each chemical element has a unique atomic number because of the presence of same type of atoms in an element.
The isotope is a variant of a particular chemical element. All isotopes have similar protons but different neutrons in numbers. Hydrogen can have different isotopes depending upon the number of neutrons.
An atom that have more electrons than protons will have a negative charge because electrons are responsible for imparting negative charge.