Radiometric dating shows that the oldest ocean crust is ___________________ _ years old and the oldest continental crust is ___________________ _ years old. Fill in the blank(s) with the appropriate word(s).
Magnetic stripes in oceanic basalts are ___________________ _ and ___________________ _ around ocean ridges. Fill in the blank(s) with the appropriate word(s).
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parallel, symmetricalsymmetrical, parallel
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.
The human body produces and destroys 15 million blood cells every second.
Vaccines prevent between 2.5 and 4 million deaths every year.
The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.
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