Answer:
Pangea existed many millions of years ago in many opinions, but it started back in the late Paleozoic Era until the very late Triassic. Pangea first began to be torn apart when a three-pronged fissure grew between Africa, South America, and North America. Scientists have found fossils of similar types of plants and animals in rocks of similar age. These rocks were on the shores of different continents. This suggests that the continents were once joined. For example, fossils of Mesosaurus, a freshwater reptile, have been found both in Brazil and western Africa.
Explanation:
Answer:
Pangaea is believed to have existed around 335 million years ago during the late Paleozoic and early Mesozoic eras.
During this time, the continents of Africa and South America were joined together as part of the supercontinent Pangaea. They were located in the southern hemisphere, with Africa to the east and South America to the west.
One piece of evidence to support their relationship is the similarity of plant and animal fossils found on both continents. Fossils of the ancient reptile Mesosaurus have been found in both Africa and South America, indicating that the two land masses were once connected. The distribution of fossils of other plant and animal species also suggests that Africa and South America were once part of the same landmass.
The theory of Pangaea and continental drift was first proposed by Alfred Wegener in the early 20th century, and it has since been supported by a range of geological and paleontological evidence. The movement of the continents has had a profound impact on the evolution of life on Earth, as it has created new habitats and allowed for the evolution of new species in isolation.
This is timed Please Help
Answer:
Answer:
1. physical
2. chemical
3. physical
4. physical
5. chemical
6. physical
7. physical
8. chemical
9.physical
10. physical
11. chemical
12. chemical
13. physical
14. chemical
15. physical
16. chemical
17. physical
18. chemical
19. chemical
20. chemical
21. chemical
Explanation:
Shanice said the three types of mountains are folded, tilted, and volcanic. How should Shanice’s statement be corrected?
fault-block should replace volcanic
lifted should replace volcanic
lifted should replace tilted
fault-block should replace tilted
Answer:
D. fault-block should replace tilted
Explanation:
The 3 types of mountains are: fold(ed), fault-block, and volcanic.
She listed tilted, which is not a main type. She did not list fault-block, so it should replace tilted.
Let me know if this helps!
The beach in Antibes, France, is composed of small, smooth rocks that have been worn
down by being tumbled against each other by the energy of the sea water
Physical or chemical?
Specific type of physical or chemical
Answer:
the second answer is the second answer
I will give brainiest
Please no jokes or incorrect answers
Sorry if I picked the wrong subject
(20 POINTS)
he eat is he eat it for lunch
Abrasion can occur due to what? Select all that apply.
water
gravity
wind
altitude
Answer:
Water, gravity, and wind can all cause abrasion. Altitude is not a factor in abrasion.
Explanation:
Answer: Altitude is not a factor in abrasion. The option which is left behind is the wrong answer
Explanation:
Identify the erosion events that are caused by gravity. Select all that apply.
glaciers
the Dust Bowl
landslides
mudslides
Answer:
landslides and mudslides. Gravity makes Glaciers move, but it is not what causes it to form
Explanation:
What conditions will help build high-quality soil? Select all that apply.
low temperatures
high precipitation
high temperatures
low precipitation
PLEASE HELP NOT SURE IF I GOT THESE RIGHT.... iT'S ON A TIMMER..
IT'S SCIENCE AND ITS ABOUT PHYSICAL AND CHRMICAL CHANGE
Answer:
Looks all correct to me!
What types of organisms do chemical biological weathering? Select all that apply.
sea urchins
lichens
bacteria
trees
What is Earth’s crust like that is located the furthest away from the center of a mid-ocean ridge? Select all that apply.
less dense
older
newer
thicker
Answer:
The Earth's crust that is located furthest away from the center of a mid-ocean ridge is:
Older: The farther away from the center of the mid-ocean ridge, the older the crust becomes. This is because new crust is continually formed at the ridge center and moves away in opposite directions.
Thicker: As the crust moves away from the ridge center, it cools and contracts, becoming thicker.
Less dense: The older, thicker crust is also less dense than the newly formed crust at the ridge center.
Therefore, the correct options are: older, thicker, and less dense.
Classify weathering by salt crystallization in a rock.
mechanical
chemical biological
mechanical biological
chemical
Answer:
salt crystallization is a type of mechanical weathering.
Explanation:
Answer:
Honeycomb weathering
Salt can lead to a type of weathering called honeycomb weathering. Groundwater seeps into rock cracks by capillary action and eventually evaporates. This yields salt crystals, which increase the pressure in rocks. Eventually the rocks will break down. This can leave pits of salt crystals that resemble honeycombs.
Explanation:
Which layer of soil is generally hard and packed?
bedrock
topsoil
subsoil
parent material
Answer:
Bedrock is the layer of soil that is generally hard and packed.
What is the name of the plant process that involves water vapor entering and exiting through the stomata? Responses evaporation condensation transpiration respiration
Answer:
exit of water vapour through the stomata is called transpiration
Why is the theory of plate tectonics more accepted than continental drift? Select all that apply.
It explains many geological processes.
It was supported by Alfred Wegener himself.
It is supported by a wealth of evidence.
It explained why there was a supercontinent, Pangaea.
Answer:
The scientist Alfred Wegener is most closely connected with the concept of continental drift. Wegener wrote a paper outlining his notion that the continents were "drifting" across the Earth.
Explanation:
i got it right on edge please like and give stars
What technology did the U.S. Geological Survey (USGS) develop to help monitor volcanic activity at the five monitoring stations in the continental U.S., Alaska, Hawai'i, and the Mariana Islands?
A.) National Seismology Center
B.) Volcano Notification Service (VNS)
C.) National Volcano Early Warning System (NVEWS)
D.) Federal Emergency Management Agency (FEMA)
Keiko said the three areas where volcanoes form are at convergent, divergent, and transform plate boundaries. How should Keiko’s answer be corrected?
Hot spots should replace divergent plate boundaries.
Subduction zone should replace convergent plate boundaries.
Subduction zone should replace transform plate boundaries.
Hot spots should replace transform plate boundaries.
Answer:
Hot spots should replace transform plate boundaries.
Classify the type of weathering that occurs when iron rusts.
chemical biological
mechanical
mechanical biological
chemical
What is the end product of weathering?
exfoliation
acidification
erosion
sediment
(I'm sure it's sediment, but I want to double check.)
Answer:
sediment
Explanation:
Define Natural Selection. Explain with an example.
Answer:
Natural selection is to ensure that only the best individuals live. Natural selection does not allow the sick or the incapacitated to survive. But man does not have natural selection, only in some cases. There is also little natural selection on farms.
Natural selection is the process in nature by which organisms better adapted to their environment tend to survive and reproduce more than those less adapted to their environment. For example, treefrogs are sometimes eaten by snakes and birds, evolving long necks has enabled giraffes to feed on leaves that others can't reach, giving them a competitive advantage.
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Wind, water, and gravity, temperature changes, and pressure changes are all a cause of what process?
biological weathering
acid weathering
chemical weathering
physical weathering
Answer:
Wind, water, and gravity, temperature changes, and pressure changes are all a cause of physical weathering.
Explanation:
Consider a palm tree plantation in the Amazon, where only one species of tree is cultivated. What changes would this kind of low biodiversity bring to an ecosystem? Check all that apply. A. increased competition for fewer food sources B. organisms that are less suited to changes in the environment C. easier reproduction for organisms D. a higher economic value
The changes that this kind of low biodiversity would bring to an ecosystem would include increased competition for fewer food sources, organisms that are less suited to changes in the environment, and easier reproduction for organisms in A, B, and C.
What is biodiversity?Increased competition for fewer food sources, such as with only one species of tree, means that the organisms that depend on it for food and habitat would have to compete for limited resources. This can lead to a reduction in the overall population and diversity of the organisms in the ecosystem. Low-biodiversity ecosystems are less resilient to environmental changes, such as climate change or natural disasters. With only one species of tree, the organisms in the ecosystem would be less adaptable to changes in the environment and more vulnerable to extinction.
Hence, the changes that this kind of low biodiversity would bring to an ecosystem would be increased competition for fewer food sources, organisms that are less suited to changes in the environment, and easier reproduction for organisms in A, B, and C.
Learn more about biodiversity here.
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What type of weathering occurs to statues when they lose their features over time due to rain?
mechanical biological
chemical biological
mechanical
chemical
Answer:
Mechanical Weathering
Explanation:
Statues are typically made of rock or some other material similar to rock. Mechanical weathering is the breakdown of rocks into smaller pieces, which is why it is a type of mechanical weathering.
How can biological weathering result in chemical erosion?
Roots loosen soil and break rocks.
Large herds trample rocks and break up soil.
Plants transpire water vapor.
Bacteria release acids and other agents that break down rock.
Answer: Biological weathering only refers to weathering caused by organisms -- animals, plants, fungi and microorganisms such as bacteria. While certain forms of biological weathering, such as the breaking of rock by tree roots, are sometimes categorized as either physical or chemical, biological weathering can be either physical or chemical
Explanation:
When the oxygen in the air combines with the iron exposed by paint peeling off an old
bicycle, a new, red-colored, crumbly substance is formed.
Physical or chemical?
Specific type of physical or chemical
Answer:
Chemical change
Explanation:
Classify weathering by lichens growing on rocks.
mechanical
chemical
mechanical biological
chemical biological
Answer:
chemical biological,
Explanation:
this must mean it equals chemical (:
How can humans manipulate soils? Select all that apply.
removing bedrock
changing the acidity
adding decaying material such as mulch
adding nutrients
Answer:
All of the options are correct:
Explanation:
Astronomers have developed several ways to measure the vast distances between Earth and the stars and galaxies. What do you know about two of these techniques? (Choose 4)
A The A.U. is used to measure distance within our solar system.The A.U. is used to measure distance within our solar system.
B An astronomical unit (A.U.) is the average distance between the Earth and the Sun.An astronomical unit (A.U.) is the average distance between the Earth and the Sun.
C Our galaxy, the Milky Way, is about 150 light-years across.Our galaxy, the Milky Way, is about 150 light-years across.
D A light-year (ly) is the distance that light can travel in one year in a vacuum.A light-year (ly) is the distance that light can travel in one year in a vacuum.
E Astronomers measure distances to objects which are outside our solar system in light-years.Astronomers measure distances to objects which are outside our solar system in light-years.
F An astronomical unit is about 93 million kilometers.
A. The average distance between the Earth and the Sun, or A.U., is used to measure distances within our solar system.
D. Distances to things outside of our solar system are measured in terms of light-years (ly), which are the maximum distances light can travel in a year in a vacuum.
To calculate the immense distances in the cosmos, astronomers mostly employ two methods. An astronomical unit (A.U.), often known as the average distance between the Earth and the Sun, is used as a standard measurement within our solar system. One A.U. is equivalent to 150 million kilometres or 93 million miles. Within our solar system, it is used to calculate the separations between planets, asteroids, and comets. Second, astronomers use light-years to gauge distances outside of our solar system (ly). The distance that light can cover in one year in a vacuum, or 5.88 trillion miles or 9.46 trillion kilometres, is known as a light-year. We may use this method to calculate the huge separations between stars, galaxies, and other astronomical objects. As a result, astronomers employ A.U.
What are the three types of nervous systems? Help Please
Answer:
Somatic Nervous System
Autonomic Nervous System
Parasympathetic Nervous System
Explanation:
If you need the types of nerves they are motor, sensory, and autonomic.
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Choose the answer that describes biological weathering.
lichen growing on rocks
stone and boulders moved by water
salt crystallization forming tafoni
acid in water acting on limestone
Answer:
Acid in water acting on limestone describes biological weathering.
Explanation:
A wind power project has been proposed for the coastline in St. Lucie County. Windmills would be used to produce energy by converting wind energy into electricity. Electricity would be produced from which energy of the wind?
A: potential
B: chemical
C: kinetic
D: solar