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Two main human sources of primary air pollutants are?
Two main human sources of primary air pollutants are burning fossil fuels and transport. Transport is actually defined as a necessary evil.
What are the two primary energy sources that drive the food chain that feeds humans Why are two energy sources required when natural ecosystems normally only require one?
producers sun
One of two ways that sedimentary and igneous rocks can be changed into metamorphic rocks?
sediment
Are the two primary gasses found in the Earth's atmosphere?
The two primary gases in the Earth's atmosphere are nitrogen and oxygen.
What are two different sediment type examples?
* Clay * Silt * Sand * Pebbles * Cobbles * Boulders * Gravel
What two types of sources that historians have?
The two different sources are primary and secondary sources
What are two sources of the sediment carried by rivers?
Mass movement and runoff.
What are the two sources that historians use?
primary sources and secondary sources.
What are two main sources of sediment that rivers and streams carry?
Silt and clay.
What are the two main sources of the sediment that rivers and streams carry?
The correct answer is silt and clay.
What are the 2 classifications of historical sources?
The two classifications of historical sources are primary sources and secondary sources. Primary sources are original, first-hand accounts of an event or topic, while secondary sources are interpretations or analyses of primary sources created by someone not directly involved in the event.
What are two sources of data?
Simple, Primary and Secondary Data
What are the two primary sources of matter?
the two primary sources of matter are mass and velocity. you can look this up to get really in depth in the topic at: http://www.matterandscience.com/massandvelocity
What are two kinds of evidence?
Primary and secondary sources.
What two sources do cells get their primary energy?
Glucose and triglycerides
What are two basic kinds of evidence?
Primary and secondary sources.
Which two sources are primary sources of infromation for an essay on a famous personality?
Biographies and autobiographies are primary sources of information for an essay on a famous personality. These sources provide firsthand accounts and insights into the person's life, experiences, and achievements.
