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kirza4 [7]
3 years ago
6

Pleaseee helppppp!!!! the most can be just like 4 sentences 20 points !!!!!

Biology
1 answer:
elixir [45]3 years ago
8 0

Answer:

The discoveries made by earlier scientists led to the development of modern atomic theory. The modern atomic theory claims that each element is made up of atom of different kind. It explains that atoms are made up of sub-atomic particles.

Claim: Works from earlier scientists helped in the formulation of the atomic theory.

Evidences:

  • John Dalton brought forward the theory that all matter is made up of atoms which are spherical and can move.
  • J.J thomson discovered the electrons.
  • Robbert Millikaan measures the charge on an electron.
  • James Chadwick discovered the neutron.

Reasoning: All these evidences show that the discoveries of the earlier scientists led to the discovery of modern atomic theory.

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The color of a mineral when it is powdered is called the streak of the mineral. Several minerals have a black streak and make it
irina [24]

Answer:

Hematite

Explanation:

The iron content of the mineral gives it a red hue after it has spent a long time exposed to air and moisture

4 0
3 years ago
H-shaped area of the spinal cord is called _________ matter and it is located around the ________________ filled with cerebrospi
Anon25 [30]

Answer:

The correct answer is "grey; central canal".

Explanation:

Grey matter refers to an area of the brain, brainstem and cerebellum comprised of unmyelinated neurons and other cells that has given its name for having a pinkish-grey color in the living brain. Grey matter is also present in the spinal cord in an are of three grey columns that are H-shaped and it is located around the central canal filled with cerebrospinal fluid

7 0
3 years ago
a scientist is studying the various prokaryotic and eukaryotic species found floating in a sample of water taken from a marine e
Butoxors [25]
The ribosome, since all organisms need to synthesize proteins.
3 0
2 years ago
How does carbon dioxide leave the atmosphere?
Delvig [45]
Plants go through a process called photosynthesis where they take in carbon dioxide from the atmosphere (as well as water and sunlight), and they turn it into oxygen (so we can breathe) and glucose (sugar)!
4 0
3 years ago
Read 2 more answers
The space shuttle Endeavor is launched to altitude of 500,000 m above the surface of the earth. The shuttle travels at an averag
Marianna [84]

Answer:

Time taken by space shuttle = 714.28 m/s

Explanation:

Given:

Distance cover by space shuttle = 500,000 meter

Speed of space shuttle = 700 m/s

Find:

Time taken by space shuttle

Computation:

Time taken = Distance / Speed

Time taken by space shuttle = Distance cover by space shuttle / Speed of space shuttle

Time taken by space shuttle = 500,000 / 700

Time taken by space shuttle = 714.28 m/s

8 0
3 years ago
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