What is the difference between chemical and physical weathering? Physical, or mechanical, weathering happens when rock is broken through the force of another substance on the rock such as ice, running water, wind, rapid heating/cooling, or plant growth. Chemical weathering occurs when reactions between rock and another substance dissolve the rock, causing parts of it […]

Why are environmental issues a major concern for the people of sub-Saharan Africa? Why are environmental issues a major concern for the people of Sub-Saharan Africa? They derive most of their livelihoods from the land. Air quality is less of a problem in Africa than in other continents. What factors hinder environmental efforts in Sub-Saharan […]

What best describes how heat energy moves within a system? Answer: Heat energy is transferred from warmer objects to cooler objects. How is heat energy lost? Heat loss occurs through radiation, conduction, convection, and evaporation. Cutaneous vasoconstriction is the most important mechanism used by the body to reduce heat loss. Thus body heat is distributed […]

What is the process of evaporation and condensation? Evaporation and condensation are two processes through which matter changes from one state to another. Matter can exist in three different states: solid, liquid or gas. In evaporation, matter changes from a liquid to a gas. In condensation, matter changes from a gas to a liquid. What […]

Which theme of geography studies the physical features climate animals and customs of an area? Place. Place describes the human and physical characteristics of a location. Physical characteristics: Includes a description of such things as mountains, rivers, beaches, topography, climate, and animal and plant life of a place. How do you explain geography to a […]

What kind of vegetation would you most likely expect to find in the chaparral biome? Common plants in the biome include poison oak, Yucca Wiple, shrubs, toyon, chamise, trees, and cacti. Oak trees, pines and mahogany trees also do well in the biome. The chaparral biome of Australia consists mainly of dwarf eucalyptus trees. How […]

What is the main reason we Cannot depend on the desert ecosystem for food production? Answer: We cannot depend on the desert ecosystem for food production because the majority of the desert is covered with sandy soil which unable to produce any crop. Desert ecosystem also features less rainfall and increasing hot temperature. Why are […]

What evidence supports the dynamo theory? Earth’s crust core contains a large amount of iron and nickel is the evidence of the dynamo theory. What is the dynamo model of the Earth’s magnetic field? In physics, the dynamo theory proposes a mechanism by which a celestial body such as Earth or a star generates a […]

What is the main purpose in expository writing? The purpose of expository writing is to present a balanced, objective description of a topic. The format of an expository essay allows for the clear and logical explanation of complex information instead of proving a point or providing the writer’s personal opinion on a subject. How do […]

How much oil reserves does Saudi Arabia have? Saudi Arabia holds 000 barrels of proven oil reserves as of 2016, ranking 2nd in the world and accounting for about 16.2% of the world’s total oil reserves of 1,000 barrels. Saudi Arabia has proven reserves equivalent to 221.2 times its annual consumption. How Long Will Saudi […]