Answer:it has risen
Explanation:
It has risen due to the burning of fossil fuels which produces a lot of green house gases.and it has also risen due to deforestation,no enough plants to consume the green house gas(carbon dioxide)
Answer:
A. the frequency decreases.
Explanation:
The wavelength of electromagnetic radiation depends on the speed of radiation and the frequency of the radiation.
The speed of the radiation is equal to the speed of light and is given as the product of its frequency and wavelength.
If
is the speed of electromagnetic radiation,
is its frequency, and
is its wavelength, then:

Therefore, wavelength is inversely proportional to its frequency.
Hence, as wavelength increases, the frequency decreases.
A magnetic substance has magnetic fields. These fields start at the North Pole wrap aroundthe magnet, and terminate at the south pole of the magnet. All magnetic substances have <span>north and south poles.</span>
Now let’s say you’re on the Moon. If you were to drop a hammer and a feather from the same height, which would hit the ground first?
Trick Question! On the moon both objects would hit the ground at the same time. On Earth, the hammer lands first.
So yeah, the student is right. Galileo gave us this theory long ago.
1) the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles that cause ionization.
2) Several feet of concrete or a few inches of dense material (such as lead) are able to block radiation.<span>
</span>