How many toes does a frog have

At which location in earth’s interior does the top density continue to increase as thickness decreases?

Some tools have graduations to show multiple measurements. for example, a ruler may have graduations for both millimeters and centimeters. when measuring the length of an earthworm, which graduations would allow for the most accurate measurement? millimeters centimeters decimeters meters

Which characteristics are typical of a human population in the postindustrial stage?