Tree Rings

As you can see, this tree is about 29 years old.

Scientists can tell the age of a tree by looking at the rings because not only do trees grow taller, they grow thicker also. Everytime the tree grows thicker, it creates a new ring. This is important because it tells you how long the tree has been alive, and sometimes it shows things that have happened to the tree throughout its life. This would be an example of absolute dating because each ring represents a certain amount of years.

Unconformity

D, A, E, B, C.
D was first because if you look carefully, you can see that it used to be whole until E intersected it later on. A was second, because before an earthquake or something else happened, D and A were horizontal. E was third, because it intersects both D and A. B was fourth because it is above A, D, and E. Lastly, C is last because it intersects B.

Des-ruction (haha get it Mr. Dunn)

I think earthquakes are most destructive because they can have buildings fall and other things fall for people who aren't very prepared for it.

1. The deepest mine in the world is 3.6 meters deep.

2. To dig to the mantle you would have to dig about 35 kilometers deep.

3. I think if I were able to reach the mantle, it wouldn't look extremely interesting. It would just look like a bunch of dirt. Same with the outer and inner core. Obviously it would not be dirt, but iron instead.

Blogpost grade

I believe I deserve somewhere in the 90s for a blogpost grade. I think I deserve such a grade because I follow all of the requirements for each blogpost. I also turn each blog in on time, and I think very thoroughly about each blog before I post it. I look for spelling and grammar mistakes, and I make sure each paragraph makes sense. I've enjoyed doing the blogs, and so far it has been a great experience. I think I'm doing a beautiful job on my blogs, and that's why I think I deserve a grade that is somewhere in the 90s.

Rock Cycle

The two main types of igneous rocks are intrusive and extrusive. An example of an intrusive igneous rock is diorite. Diorite is a coarse-grained rock thats composition is made up of feldspar, pyroxene, hornblende, and occasionally quartz. Another example of an intrusive igneous rock is gabbro. Gabbro is a coarse-grained, dark colored rock thats composition is made up of feldspar, augite, and occasionally olivine. Examples of extrusive igneous rocks are rhyolite and obsidian. Rhyolite is a light colored, fine grained, and its composition usually contains quartz and feldspar. Obsidian is a dark colored volcanic glass that forms from quick cooling of molten rock material. It cools so quickly that crystals do not form, so it is very smooth.

The two main types of metamorphic rocks are foliated and nonfoliated. Two examples of foliated metamorphic rocks are slate and phyllite. Slate is formed through the metamorphism of shale. It is a low-grade metamorphic rock that splits into thin pieces. Phyllites composition is mainly very fine grained mica. The surface of phyllite is occasionally wrinkled. It has a intermediate grade of metamorphic. Two examples of non-foliated metamorphic rocks are marble and quartzite. Marble is produced from the metamorphism of limestone. It is mainly composed of calcium carbonate. Quartzite is produced by the metamorphism of snadstone. It is mainly made up of quartz.

The two main types of sedimentary rocks are clastic and chemical. Two examples of clastic sedimentary rocks are breccia and shale. Breccia is composed of large angular fragments. The spaces in the large fragments can be filled with smaller particles or a mineral cement which binds the rock together. Shale is made of clay size weathering debris. It usually breaks into small, thin, flat pieces. Two examples of chemical sedimentary rocks are rock salt and some limestones. Rock salt is formed from the evaporation of ocean or saline lake waters. It is also known by the mineraly named halite. It is used as a winter highway treatment. Limestone is calcium carbonate. It can form from the precitpitaion of calcium carbonate from lake or ocean water..