All categories

2 years ago

The movement of material due to differences in density that are caused by differences in tempeture is called?

1 answer:

4 0

Convection. It occurs when a cooler, denser mass of gas or liquid replaces a warmer, less dense mass of gas or liquid by pushing it upward. A good example would be steam rising from a pot of boiling water on a stove top.
When the water is boiled, the water moves in roughly circular patterns because of convection. This motion is due to density differences that result from temperature differences. Also referred as a convection current.

Hope this helps you out.

You might be interested in

Identify four types of lava that form at hot spots and the characteristics of each type of lava.

artcher [175]

Aa is lava that forms a thick ,brittle crust . Pahoehoe is a lava that forms a thin crust. Pillow lava forms when lava erupts underwater. Blocky lava is kool, stiff lava that does not travel far from thr eruption site.

4 0

2 years ago

In basic geographic terms, a continent is __________.

Ivenika [448]

Answer: a) A landmass

Explanation:

A continent is composed of several huge land masses, a characteristic that differentiates it from the islands or peninsulas.

It should be noted that the sum of the total areas of the Earth's continents is about 148 million square kilometers of land. In addition, the continents constitute most (but not all) of the Earth's land surface.

6 0

2 years ago

Three factors make Earth a Goldilocks planet (everything is “just right” for conditions to support life). Choose the one that do

Taya2010 [7]

Answer:D-Atmosphere that supports a relatively narrow and consistent range of temperature

Explanation:

hope that help have a great day

3 0

3 years ago

Major events in trassic period

Yuri [45]

Answer:

Both the start and the end of the Triassic period is marked by some really interesting and important events. Major events were:

1. The major extinction event

2. Splitting of Pangaea

3. Expansion of animal life

4. Massive change and rejuvenation (appearance of Mammals)

Explanation:

The Triassic is a geologic period and system which took place 251 to 199 million years ago. The Triassic is the first and shortest period of the Mesozoic Era.

1. The major extinction event

Triassic period (and the Mesozoic era) didn’t exactly have such a glorious start. Violent volcanic eruptions, climate change, a fatal run-in with a comet/asteroid had set off the extinction of more than 90% of Earth’s species.

2. Splitting of Pangaea

By the start of the Triassic, Pangaea was already formed as a supercontinent shaped like a giant C. Almost as soon as the supercontinent formed, it started cracking. By the end of the Triassic period, 199 million years ago, tectonic forces had started splitting the supercontinent in two (Laurasia in the north and Gondwana in the south). The ocean called Tethys filled the “C” and that’s how the splitting of Pangaea started. Interesting thing to know is that earlier failed attempts of splitting formed rift valleys in North America and Africa that are today very rich in the best preserved fossils of Triassic life.

3. Expansion of animal life

There is a long list of animals that existed or first appeared in the Triassic period.

The oceans were filled with the coiled-shelled ammonites, mollusks, and sea urchins that survived the Permian extinction and were quickly diversifying. The first corals appeared! Although, some other reef-building organisms were already present.

Other amazing creatures were: dolphin-shaped ichthyosaurus, plesiosaurus, fish, ancient squid, phytoplankton (two of the major groups still in the ocean today first appeared), frogs, salamanders, crocodiles, turtles, snakes, pterosaurs (a group of flying reptiles), moss, ferns, spiders, scorpions, centipedes (thrived), grasshoppers (first appeared), etc. As I said, the list is very long.

4. Massive change and rejuvenation (appearance of Mammals)

Last but definitely not least characteristic of the Triassic is that it was the time of tremendous change and rejuvenation. Life that survived the so-called Great Dying repopulated the planet and gave rise to new creatures, such as rodent-size mammals and the first dinosaurs.

Perhaps the biggest changes came with the evolution of dinosaurs and the first mammals in the late Triassic, starting around 230 million years ago (Eozostrodon, Coelophysis, Plateosaurus)

The Triassic finished in the same way it began. Something, perhaps a volcanic belch or an asteroid collision caused another mass extinction. Dinosaurs, however, survived and went on to dominate the Jurassic. And the rest is history. :)

3 0

3 years ago

Hat have been the results of Improved agricultural practices?

Norma-Jean [14]

Answer:

Improved agricultural practices have led to increased productivity, decreased organic production, increased health risks, increased water pollution, and increased profits.

Explanation:

Since the turn of the 20th century, agriculture has experienced numerous changes and is much different nowadays than it used to be. This has been due to rapid technological development, which has also improved agricultural practices. The improvements have been in every sphere, from the protection of the plants to create more resistant and plants that have higher productivity, better irrigation, mechanization, bioengineering, and at the end of it all it has led to higher profits.

The developments in genetics have led to the creation of plants that are more resistant to diseases and have higher productivity. The pesticides, herbicides, and fungicides have all helped in the protection of the pants and destruction of pests, which further led to an increase in production, but their usage has also led to pollution of the soil and water. Unfortunately, the usage of chamicals has led to increased health risks, and significantly lowering the organic production which was dominating before.

4 0

3 years ago