Which statement best describes an individual ecosystem?
a. an closed system with regard to energy, but an open system with respect to matter.
b. an open system with regard to energy, but an open system with respect to matter.
c. a closed system with regard to both energy and matter
d. a open system with regard to both energy and matter.

In attempt to solve the working problems created by the industrial revolution, the united states and many countries in europe considered and/or adopted

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.

What is the correct term for an area of rotating currents in an ocean? when ocean currents combine, they create an area of rotating currents called an