GROWTH DEVELOPMENT CHILD
SUMMATIVE ASSESSMENT
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Most rocks
|
|
|
are made of more than one mineral.
|
|
|
Most rocks are made
|
|
|
None of the above.
|
Detailed explanation-1: -A rock is an aggregate of one or more minerals, or a body of undifferentiated mineral matter. Common rocks include granite, basalt, limestone, and sandstone.
Detailed explanation-2: -Rocks are a composed of one or more minerals. A rock can be made up of only one mineral or, as shown in the figure, a rock can be made up of a number of different minerals. So, rocks are composed of one or more minerals and minerals are composed of one or more elements.
Detailed explanation-3: -About 200 minerals make up the bulk of most rocks. The feldspar mineral family is the most abundant. Quartz, calcite, and clay minerals are also common. Some minerals are more common in igneous rock (formed under extreme heat and pressure), such as olivine, feldspars, pyroxenes, and micas.
Detailed explanation-4: -A monomineralic rock is a rock made of only one mineral. Examples include rock salt (mineral: halite), limestone (mineral: calcite), quartzite (mineral: quartz), etc.