Climate change
Greenhouse effect
Some heat energy from the Earth’s surface escapes into space. If too much heat energy escaped, the planet would be very cold. However some gases in the atmosphere can trap escaping heat energy, causing some of it to pass back to the surface.
These are called greenhouse gases, and they keep our planet warm, which is a good thing. Carbon dioxide is an important greenhouse gas.
Increasing carbon dioxide levels
Humans burn fossil fuels such as oil, coal and natural gas. The energy released is used to power cars and other machines, to generate electricity, and to keep buildings warm. The burning fuel releases waste gases, including carbon dioxide. As the human population increases, more fuel is used, and more carbon dioxide is released.
Global warming
The extra carbon dioxide increases the greenhouse effect. More heat is trapped by the atmosphere, causing the planet to become warmer than it would be naturally. The increase in global temperature this causes is called global warming.
One flower is white, even though it does not come out evenly. When you do the math, the number is not large enough to be rounded to 2.
Answer:
A) Ciprofloxacin (Cipro)
Explanation:
Ciprofloxacin is a potent antibiotic, which is part of the <u>fluorquinolone</u> class. This class has a broad spectrum of activity against various pathogenic micro-organisms that can incapacitate or kill humans and animals.
It is a prime antibiotic for the therapy of complicated urinary tract infections and bacterial diarrhea.
Ciprofloxacin is also an alternative agent for the treatment of various sexually transmitted diseases, as well as osteomyelitis and some cases of wounds.
Ciprofloxacin hydrochloride is an important weapon against bioterrorism for the treatment of the respiratory tract, being the only drug approved by the FDA (Food and Drug Administration) for treatment after exposure to inhaled anthrax.
Answer: C. 30 - 50 million years ago
Explanation:
Fossils found in layer Y formed 30 million years ago according to the graph above. Similarly, fossils found in layer Z formed 50 million years ago.
If a fossil (fern fossil) is found between layer Y and layer Z, it means that it formed between the years that the fossils in layers Y and Z formed which is 30 - 50 million years ago.
Answer:
A scope built of two systems of lenses ... ==> Compound light microscope
Explanation:
