Atmospheric carbon dioxide levels are currently higher than they have been during the last 400,000 years
a. true
b. false
Answer: a. true
You might also like to view...
The ecosystem in the Everglades National Park was impacted most by:
A. Conversion of adjacent land to agriculture and urban development B. Restricting recreational fishing C. Increased commercial fishing D. Introduction of invasive animal species
The _______________ of a stream, also known as its channel slope, is its steepness of descent from its highest elevation to its lowest
Fill in the blank with correct word.
Two third-order streams must join to form a second-order stream
Indicate whether the statement is true or false
Which of the following shows the correct order for a scientific explanation?
A. observation - question - hypotheses - predictions - results of investigation - conclusions B. predictions - hypotheses - results of investigation - question - observation - conclusions C. hypotheses - question - observation - predictions - results of investigation - conclusions