The Earth has been though many changes that have affected all of Earth’s spheres: the biosphere, geosphere, hydrosphere, and atmosphere. Geologists use clues from Earth’s history to determine the age. Scientists estimate the age of the Earth to be 4.6 billion years old. What evidence do scientists have that would help them make that estimation? Please write your response in complete sentences.

In 1957, james vicary reported that subliminal messages in a movie reel ("eat popcorn") caused viewers to rush to the concessions stands. although his findings became famous, the problem is that

A.passes laws and adopts budgets b.resolves disputes among members c.ensures legislation is applied fairly d.represents the eu globally a recent challenge to the european union created by a member state is a.migration b.free trade c.brexit d.the euro which is the most powerful position in the british government? a.the monarch b.the chancellor c.the prime minister d.the president which describes a constitutional monarchy? a.a monarchy in which a king or queen has all the power b.a monarchy in which the people elect the king or queen c.a representative government with a mostly ceremonial ruler d.a representative government with only one set of written laws

The form the boundary between north and south china. a. himalayan mountains c. change river b. xi river d. qinling shandi mountains