Answer:
There are 54 countries in Africa, today.
Explanation:
Answer:
An ecosystem is a natural environment that includes all the biotic (living organisms) parts for example plants and animals and the abiotic (non-living) such as soil, rocks and climate sharing an environment.
Which of Earth's layers is comprised mainly of extremely hot liquid metals?
A. Crust
B. Mantle
C. Outer Core
D. Inner Core
Answer: C outer core.
Explanation:
Outer core is a liquid mix of iron and nickel.
The age of groundwater between about 1,000 and 30,000 years old.
<h2>
Answer: D. The Northern Hemisphere is tilted toward the sun.</h2>
Explanation:
Solstices are astronomical events that occur twice a year (June and December), in which<u> the Sun reaches its highest or lowest apparent height in the sky, and the duration of the day or night are the maximum of the year, respectively.</u> This is because the Sun reaches the maximum north or south declination with respect to the terrestrial equator.
In this case we will talk about the June solstice, which <u>occurs regularly around June 21st and marks the beginning of summer in the northern hemisphere</u> and the beginning of winter in the southern hemisphere.
This happens because the Earth reaches the point of its orbit in which, due to the inclination of its axis, the North Pole is closer to the Sun.
In other words, <u>the northern hemisphere is tilted toward the Sun.
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This astronomical phenomenon brings the longest day and the shortest night of the year for the Northern Hemisphere.