This is the final 2 sections of understanding basic concepts for Rocks and Minerals. You will find a detailed description on the 3 classes of rocks - igneous, sedimentary, and metamorphic - that includes some fun work and questions at the end for formative assessments.
Under the Ontario Science grade 4 curriculum, this package covers:
UNDERSTANDING EARTH AND SPACE SYSTEMS
ROCKS AND MINERALS
3. Understanding Basic Concepts
3.3 describe how igneous, sedimentary, and metamorphic rocks are formed (e.g., Igneous rocks form when hot, liquid rock from deep below the earth’s surface rises towards the surface, cools, and solidifies, for instance, after a volcanic eruption.
Sedimentary rocks form when small pieces of the earth that have been worn away by wind and water accumulate at the bottom of rivers, lakes, and oceans and are eventually compacted and consolidated into rock; they can also be formed when sea water evaporates and the dissolved minerals are deposited on the sea floor.
Metamorphic rocks form when pre-existing rocks are changed by heat and pressure.)
3.4 describe the characteristics of the three classes of rocks (e.g., Sedimentary rocks often have flat layers, are composed of pieces that are roughly the same size with pores between these pieces that are commonly filled with smaller grains, and sometimes contain fossils. Igneous rocks generally have no layers, have variable textures, and do not contain fossils. Metamorphic rocks may have alternating bands of light and dark minerals, or may be composed predominantly of only one mineral, such as marble or quartzite, and rarely contain fossils.), and explain how their characteristics are related to their origin