Because they are not man made and are part of the earth's natural features caused by the the weathering and erosion of the earth.
Are you looking for their name?
They are called chemotrophs; this means that they obtain their energy from chemical reactions.
They are different from phototrops, which obtain their energy from the sun, mostly through the process called photosynthesis.
Let me know if you were looking for something else than a name and if there were options:)
Answer:
C. The fact that Earth rotates around its axis
Explanation:
The seasons are caused by the tilt of the Earth's rotational axis away or toward the sun as it travels through its year-long path around the sun. The Earth has a tilt of 23.5 degrees relative to the "ecliptic plane"
Let's call your number n. Twice your number is 2n. The product of your number and twice your number (so n multiplied by 2n) is 128.
Set up an equation:
n × 2n = 128
2n² = 128
Divide both sides by 2:
n² = 64
Square root both sides to isolate n:
n = 8
The question asks for half your number, so just half 8:
8 ÷ 2 = 4.
Half your number is 4.
Medicine and safety regulations at the work place.
