Soil development occurs:

The age of the Laetoli footprints was determined by:

A B horizon is:

Reverse stratigraphy would result from which of the following situations?

An example of a formation process is:

Mary Leakey’s discovery of fossil footprints in volcanic ash at Laetoli was important because:

The upper part of a soil where active organic and mechanical decomposition of geological and organic material occurs is the:

The force of gravity between two masses separated by 1 m is FF. If the distance between the masses is halved, what is the new force? A) 2F2FB) 4F4FC) F/2F/2D) F/4F/4

A 2 kg object is acted upon by two forces: 10 N10 \, \text{N} to the right and 4 N4 \, \text{N} to the left. What is its acceleration? A) 3 m/s23 \, \text{m/s}^2B) 2 m/s22 \, \text{m/s}^2C) 4 m/s24 \, \text{m/s}^2D) 6 m/s26 \, \text{m/s}^2

An arrow is shot horizontally at 50 m/s. How far does it fall vertically after 3 seconds? (Take g=10 m/s2g = 10 \, \text{m/s}^2) A) 30 mB) 45 mC) 90 mD) 150 m