Answer: i believe it is B.
Explanation:
Answer:
the harsh climate of the Sahara and the Sohail was influence to re culture of the century
Answer:
B) X rays do not penetrate Earth's atmosphere
Explanation:
The Chandra X-Ray observatory should operate in space due to the nature of the radiation it is using. X-rays are high energy electromagnetic radiations. The observatory will not be able to function properly since it uses x-ray because, the rays cannot penetrate the earth's atmosphere. A radiation of this type would easily be cut off by the particles in the atmosphere. The observatory has to be positioned outside of the earth.
Answer:
Explanation:Terms in this set (47)
Carbon. Marine sediments that form limestone are a major sink for this element.
Phosphorus. Guano from fish eating birds is a commercial source of this element.
Sulfur. ...
National Environmental Policy Act. ...
Endangered Species Act. ...
Montreal Protocol. ...
Geothermal. ...
Hydroelectric.
I think the answer is 1. amphibians evolved before land reptiles. and 4. elephants appear in the fossil record after dinosaurs became extinct