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ILTS Earth and Space Science (108) Practice Tests & Test Prep by Exam Edge - Topics



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Understanding what is on the ILTS Earth and Space Science exam is crucial step in preparing for the exam. You will need to have an understanding of the testing domain (topics covered) to be sure you are studying the correct information.

  • Directs your study efforts toward the most relevant areas.
  • Ensures efficient and adequate preparation.
  • Helps identify strengths and weaknesses.
  • Allows for a focused approach to address gaps in understanding.
  • Aligns your preparation with the exam's expectations.
  • Increases the likelihood of success.
  • Keeps you informed about your field's current demands and standards.
There is no doubt that this is a strategic step in achieving certification and advancing your career.

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ILTS Science Earth and Space Science Exam Blueprint

Understanding the exact breakdown of the ILTS Science Earth and Space Science test will help you know what to expect and how to most effectively prepare. The ILTS Science Earth and Space Science has 100 multiple-choice questions The exam will be broken down into the sections below:

ILTS Science Earth and Space Science Exam Blueprint
Domain Name % Number of
Questions
Science Process Skills 23% 23
Disciplinary Core Ideas 37% 37
Astronomy 14% 14
Earth Systems 26% 26

ILTS Science Earth and Space Science - Exam Topics Sample Questions

Above is a piece of quartz. When you try to break it, it breaks unevenly along jagged edges because the silicon dioxide produces tightly bonded atoms. Minerals that break in this jagged or rough way are said to have:

Correct Answer:
fracture.
the correct answer to the question is "fracture." when a mineral such as quartz breaks with jagged, uneven edges rather than along flat, clean planes, it demonstrates a property known as fracture. this physical characteristic is a result of the atomic structure of the mineral, particularly how the atoms are bonded within the mineral. in the case of quartz, which is composed of silicon dioxide, the atoms form a robust and tightly bonded three-dimensional lattice that does not allow for cleavage, which is the tendency of some minerals to break along specific planar surfaces.

fracture varies among different minerals and can manifest as irregular, conchoidal (shell-like curves), splintery, or hackly (jagged with sharp edges). other minerals that exhibit fracture include flint, jasper, and chalcedony, all of which are variants of quartz and similarly lack a cleavage property due to their molecular structures.

it is essential to differentiate fracture from other mineral properties: - **cleavage** refers to the way some minerals break along specific flat planes corresponding to zones of weak bonding in their crystal structure. this is markedly different from fracture and is not applicable to minerals like quartz that break irregularly. - **luster** describes the appearance or quality of light reflected from the surface of a mineral. while interesting and useful for identification, it does not relate to the pattern in which a mineral breaks. - **hardness** is a measure of how easily a mineral can be scratched, which is determined by the strength of the bonds between atoms in the mineral's structure and is assessed by the mohs scale of mineral hardness.

understanding these properties helps in the identification and classification of minerals in geology and related fields. each property provides insights into the mineral's composition and the environmental conditions under which it formed.