Select the statements below that correctly describe where earth's three most abundant elements (iron, oxygen, and silica) are located. choose one or more: the majority of iron is located in the core. silica is abundant in the mantle and crust. the majority of oxygen is located in the crust and mantle. oxygen is only located in earth's atmosphere and is not found anywhere inside earth. silica is abundant in the crust, mantle, and core. no iron is located in the crust.

70 pts answer the following questions in full sentences and paragraphs, using at least 150 words, in the essay box below. 1. which organisms are carnivores? herbivores? omnivores? 2. if the ecosystem is balanced, which populations should be the largest? the smallest? 3. imagine a group of hunters kills half of the rabbit population. how will the other organisms be affected? 4. imagine disease kills 85 percent of the wolf population. how will the other organisms be affected? 5. imagine a foreign mountain lion species is introduced into the ecosystem. how will the other organisms be affected?

What can you learn about precipitation levels in south america from this map? brazil is experiencing a drought. it rains more in higher altitudes. peru received the highest level of rain. venezuela got less than 25 cm of rain. 

Dubai is challenged by all of the following environmental factors except a. a warm and dry climate b. a lack of annual rainfall c. scarce freshwater resources d. a lack of valuable natural resources