A popular modern theory for the origin of the Earth-Moon system is that the early Earth collided with another planet the size of ________
Fill in the blank(s) with correct word
Mars
You might also like to view...
Both subtropical high-pressure and subpolar low-pressure regions are mainly the result of dynamic air movement
Indicate whether the statement is true or false
Judge the following sentence according to the criteria given below: The tides at any particular coast are easy to predict in detail BECAUSE nearly 400 factors are involved in a detailed calculation
A) The assertion and the reason are both correct, and the reason is valid. B) The assertion and the reason are both correct, but the reason is invalid. C) The assertion is correct, but the reason is incorrect. D) The assertion is incorrect, but the reason is correct. E) Both the assertion and the reason are incorrect.
The primary aim of the Safe Drinking Water Act is to ____.
A. set standards for pollution levels B. require screening of new products for safety and setting standards C. encourage resource conservation D. set aside or protect certain species, resources, and ecosystems E. require evaluation of the environmental impact of an activity proposed by a federal agency
During the last glacial maximum
A) there were four main pulses of glaciation. B) Scandinavia was relatively ice-free. C) sea level was about 20 feet lower than now. D) higher latitude regions were drier than they are now.