D is the correct answer.
The trend that follows a group (vertical lines) is that they each contain the same number of valence (outer) electrons
Answer:
Earth's average albedo is about 0.3. In other words, about 30 percent of incoming solar radiation is reflected back into space and 70 percent is absorbed. A sensor aboard NASA's Terra satellite is now collecting detailed measurements of how much sunlight the earth's surface reflects back up into the atmosphere.
Explanation:
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Answer: Carbonic acid occurs naturally in the body and performs important regulatory functions.
Explanation: Carbonic acid ( 
) is an acid formed from the carbon dioxide present in the body. It is also known as the respiratory acid as it helps in the transport of carbon dioxide in the body.
With the help of enzyme Carbonic Anhydrase, carbon dioxide is converted into carbonic acid. This acid is an unstable intermediate which gets dissociated into bicarbonate ions ( 
) and 
ions. immediatley.
Therefore, Carbonic acid performs important regulatory functions in the body.
Answer:
the greenhouse effect occurs in the earths atmosphere
