Answer: thermosphere is the layer of the earth's atmosphere directly above the mesosphere and directly below the exosphere while mesosphere is layer of the earth's atmosphere that is directly above the stratosphere and directly below the thermosphere.
Answer:
The greatest angle is 
Explanation:
According to angle sum property of a triangle, sum of all the angles of a triangle is equal to 
°.
The given angles of a triangle are 
Therefore,
°
°
°
≈ 87.2°
≈ 71.8°
≈ 20.9°
Therefore, greatest angle is
Answer: The Northern Hemisphere points towards the sun.
Explanation:
Summer solstice refers to two distinct times of the year, in either June the 20th or the 21st, when the Sun is farthest north in the Northern Hemisphere, and December 21st or the 22nd, when is farthest south in the Southern Hemisphere. During summer solstice in the northern hemisphere the one that gets more direct sunlight. It also signals the beginning of summer in the northern hemisphere and the start of winter in the southern hemisphere.
