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3 years ago

To measure the vast distance in space ,scientists use a unit called a ______, which is how far travels in one year.

Biology

1 answer:

Fiesta28 [93]3 years ago

3 0

Answer:

light-year; the sun

Explanation:

A light-year is the distance light travels in one year. This means that a light-year is a measure of distance, and is useful on a larger scale because of its large size (light travels a pretty big distance in a year!), so light-years are used by scientists to measure the vast distance in space.

The closest star to the Earth is the Sun.

Gravity is the natural phenomenon in which all objects with mass are attracted to (or gravitate towards) one another. Since gravity is neither a measure of distance nor a star, it doesn't fit any of the answer blanks.

Light is the portion of the spectrum of electromagnetic radiation that is visible to the human eye (between infrared and ultraviolet wavelengths). Since light is neither a measure of distance nor a star, it doesn't fit any of the answer blanks.

A megameter is an instrument for determining longitude by observation of the stars. Since a megameter is neither a measure of distance nor a star, it doesn't fit any of the answer blanks.

Betelguese is a star that is part of the Orion, notable because of its brightness and size, as well as the fact that it is likely to become a supernova in less than a million years. While Betelguese is a star, it isn't the closest star to the Earth. Therefore, it doesn't fit any of the answer blanks.

Hope this helps! :)

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What are the functions and vessels of the heart, and what are some cardiac disorders that might be life-threatening to a person

zavuch27 [327]

Answer:

The cardiovascular, or circulatory, the system supplies the body with blood. It consists of the heart, arteries, veins, and capillaries. but the things that might be life-threatening to a person or animal are;

Explanation: angina is a type of chest pain that occurs due to decreased blood flow into the heart this can harm animals and people. there is also - - - arrhythmia,which is or an irregular heartbeat or heart rhythm,

- congenital heart disease, in which a problem with heart function or structure is present from birth.

-coronary artery disease, which affects the arteries that feed the heart muscle.

- Heart attack, or a sudden blockage to the heart’s blood flow and oxygen supply this can kill. heart failure, wherein the heart cannot contract or relax normally,

- dilated cardiomyopathy, a type of heart failure, in which the heart gets larger and cannot pump blood efficiently and the last one is

- hypertrophic cardiomyopathy, in which the heart muscle walls thicken and problems with the relaxation of the muscle, blood flow, and electrical instability develop

these are only a few that can harm or even kill a living thing like and animal or person these things are really harmful.

I hope this helps you!!

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2 years ago

Broca's area is the portion of the brain responsible for the production of ____.

katrin2010 [14]

This answer is best suited to say that the Broca's area is responsible for speech production and function. Moreover, comprehension is done in the Wernick's area. Thank you for your question. Please don't hesitate to ask in Brainly your queries.

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Which was not used in support of the continental drift hypothesis? fossil evidence coastline fit of South America and Africa anc

aniked [119]

Answer:

composition of meteorites

Explanation:

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