What is true about the Earth's orbit around the Sun?
a. Earth's orbit is a perfectly circular path.
b. Earth's orbit takes exactly 365.50 days to complete.
c. Aphelion is the point where the Earth is closest to the Sun in its orbit.
d. Perhelion is the point where the Earth is closest to the Sun in its orbit.
d. Perhelion is the point where the Earth is closest to the Sun in its orbit.
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The fossils seen at Ashfall, Nebraska, perished as result of an eruption of Yellowstone some 1500km (931mi) away.
Answer the following statement true (T) or false (F)
Supercell thunderstorms differ from ordinary cell (air mass) thunderstorms because
a. the updraft in a supercell thunderstorm is shorter-lasting and is stationary.. b. ordinary thunderstorms do not produce hail. c. supercell thunderstorms produce precipitation. d. the supercell thunderstorm is greater in size. e. the updraft in a supercell thunderstorm is longer-lasting and rotates.
Ecosystem services are often classified into four different categories that include provisioning services (supplying us with food, air, and water), as well as ________
A) regulating, cultural, and supporting services B) aesthetic, spiritual, and recreational services. C) aesthetic, cultural, and sustainable services D) regulating, sustainable, and homeostatic services E) aesthetic, ecological, and regulating services
On average, algal beds and reefs have higher net primary productivity than tropical rain forests
Indicate whether the statement is true or false