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Ulleksa [173]
3 years ago
12

Identify a specific scientific concept or phenomenon for which our understanding has changed over time (e.g., the nature and str

ucture of the atom, genetics, plate tectonics, evolution, the solar system, big bang, biogeography).
Biology
1 answer:
frutty [35]3 years ago
6 0
The theory of plate tectonics evolved from the previous theory of continental drift. Alfred Wegener came up with the latter theory in comparing the coastline shapes of for example eastern South America with western Africa they seemed to fit together. However, there was no mechanism for this until I believe in the late 1960's or early 1970's the theory of plate tectonics was developed which the Canadian geophysicist played a part in J. Tuzo Wilson. The latter theory shows how the mid-oceanic ridges are spreading and the continental margins have the ocean floor subducting. 
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Two steel balls that are the same mass and size are rolled with the same force across different level surfaces.
san4es73 [151]

Answer:

The reason why the ball rolling across carpet will come to a stop faster than the one rolling across concrete is the friction (option B).

Explanation:

The contact surface on which the balls move is different. Irregularities in the carpet cause the ball in it to stop faster. The concrete surface is less irregular, and allows the ball to move a little more and then stop. This is due to friction.

In physics,<u> friction is a force that is capable of opposing movement</u>, since the contact of two surfaces limits its movement. A smooth surface produces less friction than a rough or irregular surface.

Since the friction that stops both balls occurs when they are in motion, it is called dynamic friction, that is, the force that causes a moving body to stop.

Learn more:

Friction brainly.com/question/1714663

6 0
3 years ago
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jeyben [28]
Exposure to antigen as this input brings the total to five answers. y or n
7 0
3 years ago
What is one major effect of scientific research in biology?
ArbitrLikvidat [17]
New germs are being delevoped
6 0
3 years ago
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How are the chicken wing and human arm similar, different, and how they are adapted to allow the organism to survive in their en
saw5 [17]
They share similarities in their tissue and cartilage. Both humans and chickens have epithelial tissue, muscle tissue and connective tissues; as well as cartilage to support the joints between bones. The bone structure is similar as well. Both animals have a humerus, which connects the shoulder and radius. Unlike humans, chickens can't move their metacarpals. Chicken bones are also hollow, making them lighter and more built for flight. Our arms are made more for grabbing, lifting and picking things up. 
Hope this helps!
5 0
4 years ago
Specimens are put on swings before being looked at under the microscope, true or false?
IRISSAK [1]

Answer:

According to what i know they are put under SLIDES not SWINGS

Explanation:

hope it helps

5 0
3 years ago
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