What happens over time as a stream's channel erodes?

A - the stream becomes a watershed

B - the stream becomes a valley

C - the stream becomes a river

D - the stream dries out

How does a zygote differ from a daughter cell produced in mitosis of the mother?

Describe the cell cycle

Using the periodic table, fill in the following table with the number of electrons in each energy level of the element given. oxygen n=1 n=2 n=3 n=4

Which human body system includes the lungs, liver, skin and kidneys?

Why is solar energy a indirect source of hydroelectric power?

Aquaculture cannot reduce the number of fish caught in the wild. a. True b. False

Why does the reporter have a tube up his nose? to accurately measure core temperature True or False

Charles Goodyear was a scientist who was looking for ways to keep rubber from melting in the summer heat and becoming brittle in the winter cold. He discovered the solution by accident when someone left a sample of rubber and sulfur on the stove.

Discuss why scientists know so little about Precambrian Earth

If two elements are in the same chemical family then what can be predicted about their Spectra