This six weeks, we will study about the Earth, Moon, Sun, and the Solar System. These concepts can be found in Unit C in our textbook. Below you will find links to help you better understand each concept.
Earth’s Structure and Properties
There are four Earth layers. The crust which is the Earth’s outermost layer and made up of solid rock. The mantle which is the layer right below the crust. It is 1,800 miles wide constantly being pressed down by the other layers. The third layer is the outer core. It is a liquid lawer that is made of melted iron. The fourth layer is the inner core. It is 800 miles wide and made up of solid materials.
http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Inside.shtml
or
http://scign.jpl.nasa.gov/learn/plate1.htm
Soil
Have you ever wondered why we need soil or dirt? It is very important and has several layers. Read on pages C 44-C49 to learn about this interesting material.
Rock Cycle
Have you ever really looked at the rocks on the ground? The next time you see one, pick it up and try to decide which of the three types of rocks it can be classified as (igneous, metamorphic, or sedimentary). Igneous rocks are primarily made of molten material from volcanoes or deep inside of the Earth. Some examples are granit, obsidian, and basalt. Sedimentary rocks are bits or chunks of material that have been broken apart by water, wind, or ice. Some examples are shale and limestone. Metamorphic rocks are rocks that can be changed into both of the other types depending on what is done to them. If heat is applied, they become igneous rocks. If pressure is applied they turn into sedimentary rocks.
http://library.thinkquest.org/J002289/index.html
Moon’s Structure and Properties
The moon has many interesting properties, including it’s eight phases.
http://www.woodlands-junior.kent.sch.uk/time/moon/phases.html
Moon Missions
http://www.google.com/moon/
The Sun and its Properties
What do we really know about the Sun? Click here to learn more about the sun: http://www.kidcyber.com.au/topics/sun.htm
The Solar System
http://science.nationalgeographic.com/science/space/solar-system