The energies involved are so large, and the nucleus is so small that physical conditions in the Earth (i.e. The rate of decay or rate of change of the number N of particles is proportional to the number present at any time, i.e.The half-life is the amount of time it takes for one half of the initial amount of the parent, radioactive isotope, to decay to the daughter isotope.

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Browse earth science questions or use our advanced search to find existing questions while filtering by grade levels and keywords. Related: Fun Daily Activities for Earth Science Week and Online Earth Science Lessons © Copyright Notice: All worksheets contain copyrighted work and are designed for use by individual teachers, tutors, and parents.

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Minerals have a specific chemical structure which is the same throughout the entire mineral.

Rocks, on the other hand, are composed of a variety of different minerals and are not consistent throughout their structure.

These consist of Modified True/False, Multiple Choice, Completion, Matching, Short Answer and Problem Solving.

Upon completion, web page will automatically grade and give you feedback on your performance.

Investigate the planet Earth with these assessments on its structure, processes, and resources.

Earth Science activities include rock classification and diagramming the rock cycle.

Igneous rocks formed on the surface cool down in just a matter of a few hours.

The crystals in these rocks can be microscopically small.

Instead, it is a rock composed of multiple minerals.