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patriot [66]
3 years ago
11

How do scientists know that dark matter and dark energy exist even if we can not see them

Biology
1 answer:
Gre4nikov [31]3 years ago
7 0

Answer:

We only know it's there because we can see the effect of its gravity. Scientists study dark matter by looking at the effects it has on visible objects. Scientists believe that dark matter may account for the unexplained motions of stars within galaxies. Computers play an important role in the search for dark matter information.

Explanation:

Hope That helps!

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How are temperature and salinity related in a thermohaline circulation pattern?
katovenus [111]

Answer:

The correct answer is option D.

Explanation:

Thermohaline circulation is the circulation of currents in the deep ocean due to the density of the water which is controlled by heat and salinity. Water in the ocean posses layers or defined boundaries based on the density which provides driving force to the deep ocean currents.

Formation of these layers is due to the sinking of the cold water in the basin which and ice formation which leaves the salt in the seawater ,therefore, increasing salinity. This increased salinity increases its density and the surface water is replaced by the sinking water causing deep ocean currents.

Thus, option D is the correct answer.

5 0
3 years ago
Which of these is a primary producer : tadpole, water snail, mosquito larvae, dragonfly nymph?
Kitty [74]

i believe the answer is A.) Tadpole

8 0
3 years ago
If the Earth didn't rotate, winds would travel in a straight line. But since the Earth does rotate, the
kari74 [83]

[ C. Coriolis Effect ]

If the Earth didn't rotate, winds would travel north or south because of the differences in pressure and temperature. The Earth does rotate, so, the Coriolis Effect diverts the wind to the left of the Southern Hemisphere and right of the Northern Hemisphere. The Coriolis Effect is very important because it creates cyclonic weather system.s

Best of Luck!

6 0
3 years ago
Which statements describe steps taking place in the nitrogen cycle shown above?
astraxan [27]

The statements that describe steps taking place in the nitrogen cycle are

  • Many biotic and abiotic factors play a role in recycling nitrogen ( A )
  • Farming practices and chemicals lead to a build-up of nitrates in the soil ( E )

Nitrogen cycle is biochemical process whereby nitrogen is converted to various chemical forms as it passes through the atmosphere, Marine and terrestrial ecosystems .

Nitrogen cycle undergoes four ( 4 ) important processes which are :  

  • Fixation
  • Ammonification
  • Nitrification and
  • Denitrification

Hence we can conclude that The statements that describe steps taking place in the nitrogen cycle are :

Many biotic and abiotic factors play a role in recycling nitrogen and

Farming practices and chemicals lead to a build-up of nitrates in the soil

Learn more about Nitrogen cycle : brainly.com/question/1380063

5 0
2 years ago
How do people know when they have been bitten by the vector that causes African
IceJOKER [234]

Answer:

Explanation:

African trypanosomiasis is a parasitic disease transmitted by the tsetse fly. It gets its nickname 'sleeping sickness' because symptoms can include a disturbed sleep pattern.

5 0
3 years ago
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