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Nikitich [7]
3 years ago
6

Frozen water (ice) has less density than liquid water.

Biology
1 answer:
WARRIOR [948]3 years ago
3 0
The ice has less density than liquid water, so it floats on the water surface. Therefore during the winter all the lakes and rivers are frozen only at a top. Deeper layers of water are cold, but still liquid and it allows fish and other organisms to survive. Moreover, the ice cover provides temperature isolation so liquid water beneath the ice has more or less constant temperature (around 4 dgr Celsius)
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It is known that complex carbohydrates provide more sustained energy over time than simple sugars such as sucrose. Complex carbo
lana [24]

Answer:

Complex carbohydrates contain longer chains of sugar molecules than simple carbohydrates. The body converts these sugar molecules into glucose, which it uses for energy. As complex carbohydrates have longer chains, they take longer to break down and provide more lasting energy in the body than simple carbohydrates

Explanation:

5 0
3 years ago
Which geological feature is most common at oceanic-continental convergent boundaries?
alex41 [277]

Trenches are geological feature is most common at oceanic-continental convergent boundaries.

Explanation:

Usually, the oceanic plate, because it is denser, becomes subducted underneath the continental plate. The enormous stress of the two colliding plates causes the plates to warp abit downwards along the boundary causing a trench to form that stretches the boundary.

As the oceanic plate gets subducted and ‘dives’ into the mantle, it begins to melt into magma. Usually, due to the enormous stress along the boundary, fissures develop on teh continental plate along teh boundary. The magma rises through these fissures and erupts at the surface. Several mountains form long the boundary forming another signature geological feature of convergent boundary which is volcanic arc mountains.

Learn More:

For more on geological features of tectonic plate boundaries check out;

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7 0
4 years ago
Deforestation is the most serious problem facing the world’s forests and the main regions of forest loss are:____.
liberstina [14]

Deforestation is the most serious problem facing the world’s forests and the main regions of forest loss are Amazon rain forest.

Deforestation refers back to the decrease in wooded area areas internationally which are misplaced for different uses such as agricultural croplands, urbanization, or mining sports. significantly accelerated by means of human sports due to the fact that 1960, deforestation has been negatively affecting natural ecosystems, biodiversity, and the climate

If forests are cleared, or even disturbed, they release carbon dioxide and different greenhouse gases. forest loss and harm is the cause of around 10% of worldwide warming. there may be definitely no manner we can fight the climate crisis if we do not prevent deforestation.

Forest loss captures  essential influences on woodland cover: deforestation and forest degradation. Deforestation is the whole removal of bushes for the conversion of wooded area to every other land use inclusive of agriculture, mining, or cities and towns.

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4 0
2 years ago
While alive, an organism absorbs (radioactive) carbon 14 at such a rate that the proportion of carbon 14 in the organism remains
Inga [223]

Answer:

The person has been dead for approximately 15,300 years

Explanation:

<u>Available data</u>:

  • The half-life of carbon 14 is 5,600 years
  • The human skeleton level of carbon 14 is 15% that of a living human

To answer this question we can make use of the following equation

Ln (C14T₁/C14 T₀) = - λ T₁

Where,

  • C14 T₀ ⇒ Amount of carbon in a living body at time 0 = 100%
  • C14T₁ ⇒ Amount of carbon in the dead body at time 1 = 15%
  • λ ⇒ radioactive decay constant = (Ln2)/T₀,₅
  • T₀,₅ ⇒ The half-life of carbon 14 = 5600 years
  • T₀ = 0
  • T₁ = ???

Let us first calculate the radioactive decay constant.

λ = (Ln2)/T₀,₅

λ = 0.693/5600

λ = 0.000123

Now, let us calculate the first term in the equation

Ln (C14T₁/C14 T₀) = Ln (15%/100%) = Ln 0.15 = - 1.89

Finally, let us replace the terms, clear the equation, and calculate the value of T₁.

Ln (C14T₁/C14 T₀) = - λ T₁

- 1.89 = - 0.000123 x T₁

T₁ = - 1.89 / - 0.000123

T₁ = 15,365 years

The person has been dead for approximately 15,300 years

4 0
3 years ago
Which of the following forms blood clots?
emmasim [6.3K]
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</span>
5 0
4 years ago
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