Materials, such as sand and rocks, are constantly being added to land masses through the process of deposition. Deposition occur
s when the weights of the materials are greater than the forces that are transporting the materials. Jeremiah sets up an experiment to better understand the process of deposition. In his experiment, he places a pile of sand at the top of a tube. Then, he pours water down the tube at varying speeds. Finally, he measures the amount of sand that is deposited throughout the tube.
What is the test variable (independent variable) in Jeremiah's experiment?
A.
the initial quantity of sand
B.
the speed of the water
C.
the type of tube that was used
D.
the quantity of sand in the tube
Explanation:Mount St. Helens, Washington, is the most active volcano in the Cascade Range. Its most recent series of eruptions began in 1980 when a large landslide and powerful explosive eruption created a large crater, and ended 6 years later after more than a dozen extrusions of lava built a dome in the crater.
All cells contain genetic information in the form of DNA molecules. ... Empirical evidence is required to differentiate between cause and correlation and to make claims about the role of DNA and chromosomes in coding the instructions for the characteristic traits passed from parents to offspring.
