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Tom
2 months ago
7

How have scientists determined the earth's core is composed of iron and nickel?

Biology
1 answer:
-BARSIC- [2.5K]2 months ago
8 0
<span>The accurate option from the available choices is: "Scientists have identified Earth's core composition through radiometric dating by analyzing meteorites".
</span><span>To date materials, radiometric dating or radioactive dating procedures are utilized, such as for rocks or carbon, where trace radioactive elements were specifically incorporated when formed. The method examines the ratio of naturally occurring radioactive isotopes in the material to the quantities of their decay products, which form at a consistent decay rate.</span>
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What is the purpose of the “spine” of vegetation in the Fusionopolis building? Check all that apply. It insulates the complex in
enyata [2506]

The correct responses include:

It provides insulation for the complex in winter.

It ensures passive cooling during summer months.

Fusionpolis is a building located in Singapore, featuring a facade of spine vegetation. This unique cover is well-regarded for providing heat insulation, which effectively maintains the building's temperature. The spines function as insulation during colder months, while their transpiration process assists in cooling during summer.

8 0
2 months ago
Explain why the passenger pigeon,which was once the most abundant bird in north America,disappeared completely.
garik1379 [2080]
The "passenger pigeon" was once the most prevalent bird in North America, with populations soaring to around 3 billion. They typically traveled in large flocks. Their decline began in the 19th century as they were hunted for food due to their affordability and taste. Additionally, they served as a valuable protein source and were easy to capture because of their numbers despite their fast flight. Some were killed to prevent crop damage, and their nesting habitats faced disturbances, leading them to leave forests. Over-hunting, exacerbated by technological advancements, resulted in more pigeons being killed than were being born, leading to their extinction, with the last one dying in 1914.
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2 months ago
The common ancestors of birds and mammals were very early (stem) reptiles, which almost certainly possessed three- chambered hea
garik1379 [2080]
The hearts of birds and mammals, which have four chambers, are accurately classified as homoplasies. In evolutionary terms, homoplasies refer to traits that are shared across different species, even though their common ancestors lacked these traits entirely. To illustrate, both bird and bat wings perform a similar function of enabling flight, yet these structures evolved separately without being present in their ancestors. Consequently, while birds and mammals each have a four-chambered heart, their predecessors only possessed three chambers. This independent evolution exemplifies homoplasy.
5 0
1 month ago
Read 2 more answers
When rainwater attacks formations of limestone, the minerals dissolve and wash away with the mildly acid rainwater. This is an e
inysia [2303]

This illustrates the dissolution of carbonates.

When carbon is combined with minerals, it dissolves carbon. This process alters the minerals that hold calcium, magnesium, potassium, and sodium. Rainwater, which is mildly acidic, attacks limestone formations, leading to the dissolution of the constituent minerals that wash away.

4 0
1 month ago
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