Answer:
A. Methane
Explanation:
Methane is a gas not a solid. Every other answer choice is a solid.
Answer:
3: A device that uses radioactive fluid to determine the active areas of the brain
Explanation:
A positron emission tomography (PET) scan is an imaging test that helps reveal how your tissues and organs are functioning. A PET scan uses a radioactive drug (tracer) to show this activity. This scan can sometimes detect disease before it shows up on other imaging tests.
Depending on the type of exam, the radiotracer is injected, swallowed or inhaled as a gas. It eventually accumulates in the area of the body under examination. A special camera or imaging device detects radioactive emissions from the radiotracer. The camera or device produces pictures and provides molecular information.
1 to 2 Felt slightly by some people. No damage to buildings.
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3 to 4 </span><span>Often felt by people, but very rarely causes damage. Shaking of indoor objects can be noticeable.
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<span>5 to 6 <span>Noticeable shaking of indoor objects and rattling noises. Felt by most people in the affected area. Slightly felt outside. Generally causes none to minimal damage. Moderate to significant damage very unlikely. Some objects may fall off shelves or be knocked over.
Hope this helps :)
just look up Richter Magnitude scale </span></span>
Answer:
Shows the common ancestor of all living organisms
Explanation:
They're just the lineup of organisms looking for a common ancestor and common traits or where the traits came from.
