What are some of the exceptions in our solar system?
In other words, the Solar System is a flattened spinning system. There are exceptions to this, notably Pluto among the planets, which has a tilted eccentric orbit, and Venus, Uranus and Pluto, which have retrograde spin. Disk formation appears to be common around newly forming stars.
What is the most likely reason that there are no other Jovian planets in our solar system beyond Neptune?
D) They were formed by condensation and accretion in a disk of gas around the planet. What is the most likely reason that there are no giant planets beyond Neptune? A) Any planets forming beyond Neptune would have drifted out of the solar system due to the weakness of the Sun’s gravity at this distance.
What do we mean by the frost line when we discuss the formation of planets in the solar nebula?
What do we mean by the frost line when we discuss the formation of planets in the solar nebula? It is a circle at a particular distance from the Sun, beyond which the temperature was low enough for ices to condense.
What are four key features of our solar system that any theory of solar system formation must be able to explain?
What are four key features of our solar system that any theory of solar system formation must be able to explain? There are vast numbers of asteroids and comets. There are clear patterns to the rotation and orbits of large bodies in the solar system. There are a few notable “exceptions to the rules.”
What are the key features of our solar system?
Our solar system consists of our star, the Sun, and everything bound to it by gravity — the planets Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune, dwarf planets such as Pluto, dozens of moons and millions of asteroids, comets and meteoroids.
What is the correct order for the formation of our solar system?
Our solar system formed about 4.5 billion years ago from a dense cloud of interstellar gas and dust. The cloud collapsed, possibly due to the shockwave of a nearby exploding star, called a supernova. When this dust cloud collapsed, it formed a solar nebula—a spinning, swirling disk of material.
What can we learn about the formation of our solar system by studying other stars?
Explain. Observing other stars allows us to see that different types of planets and planet formation begins in the same location. Observing other stars can also help us understand how planets formed in systems with stars similar to our own Sun by observing the many stages those stars go through.
How do we define the length of a year on Earth quizlet?
The length of a year is determined by Earth’s revolution around the sun. It takes about 365 days to revolve around the sun. Seasons change as Earth orbits the sun. When it is summer in the Northern Hemisphere it is winter in the Southern Hemisphere.
Which aspects of seasonality are caused by?
The seasons are caused by the tilt of the Earth’s rotational axis away or toward the sun as it travels through its year-long path around the sun. The Earth has a tilt of 23.5 degrees relative to the “ecliptic plane” (the imaginary surface formed by it’s almost-cicular path around the sun).
What is the largest geographic feature on Earth?
Largest Geographical Features in the World
| Feature | Name |
|---|---|
| Largest Desert | Antarctica |
| Largest Glacier | Lambert Glacier (Antarctica) |
| Largest River | Amazon (South America) |
| Largest Lake | Caspean Sea |
Which of the following has the deepest waters?
1. Mariana Trench. Located in the western Pacific Ocean, the Marina Trench is considered to be the deepest part of the Earth’s surface. In fact, it is the Challenger Deep in the Mariana Trench that is known as the deepest point.
Which two earth layers are separated by the Moho boundary?
The Mohorovicic Discontinuity, commonly called the “Moho” is recognized as the boundary zone between Earth’s crust and the mantle. This boundary marks a change in seismic-wave velocity from the crust to the uppermost mantle within the (lithospheric) plate.
Is the continental crust made of basalt?
The crust is composed of two basic rock types granite and basalt. The continental crust is composed mostly of granite. The oceanic crust consists of a volcanic lava rock called basalt. Basaltic rocks of the ocean plates are much denser and heavier than the granitic rock of the continental plates.
What is Earth’s continental crust made of?
Continental crust is mostly composed of different types of granites. Geologists often refer to the rocks of the continental crust as “sial.” Sial stands for silicate and aluminum, the most abundant minerals in continental crust.
Why is the continental crust thicker and less dense?
The continental crust is also less dense than oceanic crust, although it is considerably thicker. Because of its relative low density, continental crust is only rarely subducted or recycled back into the mantle (for instance, where continental crustal blocks collide and over thicken, causing deep melting).
Which crust is more dense?
Oceanic crust
Why is the oceanic crust so dense and heavy?
Oceanic crust is denser because it generally melts to a higher fraction than continental crust. Oceanic crust is composed of mafic minerals that are rich in iron and magnesium due to which the density increases. This is because the eruption of basaltic magma occurs at the divergent plate boundary.
What would happen if both types of crust has the same density?
If both types of crust had the same density, there would be no place for the water to pool so the entire Earth would be covered in a shallow layer of water. This might cause more evaporation as more surface area is exposed.
Which type of plate is most dense?
Oceanic & Continental Plates The oceanic plate is denser and sinks due to its lower buoyancy. It’s sucked into the asthenosphere and is melted deeper into the Earth, called a subduction zone. The continental plate is less dense and floats over the top of it since it is more buoyant.
What is the only pure oceanic plate?
An example of an oceanic plate is the Pacific Plate, which extends from the East Pacific Rise to the deep-sea trenches bordering the western part of the Pacific basin. A continental plate is exemplified by the North American Plate, which includes North America as well as the oceanic crust…
What causes the separation of plates?
The heat from radioactive processes within the planet’s interior causes the plates to move, sometimes toward and sometimes away from each other. This movement is called plate motion, or tectonic shift.
What will happen if two oceanic plates collide?
When two oceanic plates converge, the denser plate will end up sinking below the less dense plate, leading to the formation of an oceanic subduction zone. Old, dense crust tends to be subducted back into the earth. An example of a subduction zone formed from a convergent boundary is the Chile-Peru trench.
What happens when two plates of different densities collide?
When plates of differing densities collide, the plate that is more dense goes under the less dense plate. Trenches and volcanic mountains form.
Which tectonic plate do we live on?
North American Plate
What happens if oceanic plate continues to move downward?
The leading edge of oceanic plate will melt if it continues to move downward because the temperature through the crust is higher.