An Astronomer Tells You That He Has Discovered a New

question 93

Multiple Choice

An astronomer tells you that he has discovered a new planet that he calls Planet X. All he knows about Planet X so far is that it has a very dense atmosphere with a temperature approximately 5 times warmer than that of Earth. What hypothesis can you reasonably make regarding the atmosphere of Planet X?

• A) The atmosphere of Planet X must not contain any oxygen, so people couldn't live there.
• B) The nitrogen cycle does not operate on Planet X in the same way it does on Earth.
• C) Planet X cannot contain water in any form.
• D) The atmosphere of Planet X has a higher concentration of greenhouse gases than Earth's does.

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Definitions:

Balance of Trade

The net difference in value between a country's exports and imports over a certain period.

Balance on Capital Account

A national accounting measure that records all transactions for foreign investments and loans going in and out of a country.

Net Transfers

The net amount of money, goods, or services being transferred from one entity to another, after accounting for inflows and outflows.

Balance of Capital

The net flow of capital, such as money and assets, into or out of a country, reflecting all financial transactions.