Earth Science SOL 2015

Front

What is the independent variable in an experiment?

Back

The independent variable is the factor that is manipulated or changed in an experiment to test its effects on the dependent variable.

Front

What is the significance of fossil layers in geology?

Back

Fossil layers help determine the relative ages of fossils, with deeper layers generally being older than those above them.

Front

What evidence supports the theory of meteorite impact leading to extinction?

Back

Iridium found in meteorites is also present in rock layers that are 66.4 million years old, supporting the impact theory.

Front

How does altitude affect air pressure?

Back

Air pressure decreases with increasing altitude; specific ranges can be identified for different pressure levels.

Front

What is soil composed of?

Back

Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life.

Front

Define 'independent variable' in scientific research.

Back

The independent variable is the variable that is changed or controlled in a scientific experiment to test its effects on the dependent variable.

Front

What is the role of fossils in understanding Earth's history?

Back

Fossils provide evidence of past life and help scientists understand the evolution of species and changes in the environment.

Front

Explain the concept of relative dating in geology.

Back

Relative dating is a method used to determine the age of rocks and fossils in relation to one another, without determining their exact age.

Front

What is the Cenozoic Era?

Back

The Cenozoic Era is the most recent geological era, beginning 66 million years ago, characterized by the dominance of mammals.

Front

What is the relationship between altitude and air pressure?

Back

As altitude increases, air pressure decreases due to the thinning of the atmosphere.