What changes were necessary in earth's atmosphere to allow complex organism to evolve

According to Newton's first law of motion, what will an object in motion do when external force acts come to a stop move at the same velocity speed up change direction

Which term describes how fast the atoms or molecules inside an object are moving? A. Temperature B. Heat C. Density D. Pressure

What's the name of the non-foliated metamorphic rock that results from contact metamorphism?

A gas is collected over water at 20C in a eudiometer tube until the pressure is equilibrated with the atmospherica pressure. What is the preussre of the dry gas if the barometric pressure is 771?

While a balloon-supported gondola is rising at a speed of 2.0 m/s, a passenger in the gondola throws a small ball down at a speed of 5.0 m/s relative to his body.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?

An experiment is performed to obtain the value of a physical property. If the true (i. e., correct) value of the property is 50 and the measured (i. e., experimental) value is 32, the percent error of the experimental result is:

White moths were found in huge numbers in the city of Birmingham. These moths could be easily camouflaged by the trees. Because of sudden industrial development, the trees in the city were covered with soot.

What two factors determine how fast weathering occurs

A sound that's produced by a single wave at a constant frequency and with no overtones is called