Geologic Time - Devonian Period

Devonian Period

Devonian Period started 417 million years ago and ended 354 million years ago. This period was the age of fish. During this period there was a sharks, rays, lobe finned fish. Ammonities increased in population. First forests formed in this period. Some trees developed up to 38m high. Some rock types were Hunsruck Shale, Rhynie Chert, and the gilboa forest. 

Project Reflection

     1. What did you enjoy most about this project?
One thing I enjoyed about this project is working in partners. So we could divide the work. 

     2. What was most challenging about this project? Why?

One challenging thing about this project was writing reference, because we had to copy every single link and paste it to our reference page. Finding information was also challenging, because you don't know which information is true and which is wrong. 

     3. What would you change about this project and why?

One thing I would change about this project is I would choose a different geologic time period.   

     4. What are the three things that you learned from this project? 

Three things I learned from this project are Earth has a huge history, and it includes eons, eras, periods, and epochs. Devonian period is one of those periods, and it is the age of fish. Supercontinent Pangea formed during this period. 

The Stars - Blog Entry

  

     What is a star?
     
    A star is a ball of hot gas. Stars are born in giant clouds. Stars look small because they are light years away from us. In fact, some of them are even bigger and hotter than our Sun. The stars can be cool and dim, cool and bright, hot and dim, and hot and bright. They can be blue, red, yellow, white, and orange.

   Types of Stars

   Stars has a size - tells how big or small a star is, luminosity - tells how bright or dim a star is, temperature - tells how hot or cool a star is, spectral class - a letter that tells the temperature of a star, type - tells what stage a star is in and color - tells the color of a star.

     There are 4 types of stars: white dwarf, main sequence, giants, and super giants. White Dwarf - has old, small, mostly hot, and dim stars; Main Sequence - has middle age, medium, hot and cold, bright and dim stars; Giants - has middle age, large, bright, hot and cold stars; and Super Giants - has middle age large, bright, hot and cold stars.

   H-R Diagram
     H-R Diagram, which stands for Hertzsprung-Russel Diagram, is a graphical tool used by astronomers to classify stars based on their luminosity, spectral type, color,temperature, and evolutionary stage. This diagram also shows relationships and differences between stars.
  In this diagram stars are represented by a dot. The position of each dot tells us two things about each star: its luminosity and its temperature. A star in the upper left of the diagram would be hot and bright. A star in the lower right of the diagram would be cool and dim.

    Nuclear Fusion

     Nuclear Fusion is a process when nuclear reactions inside a star change 2 hydrogen gas molecules in to a helium molecule. Nuclear reactions help star to born, because when the giant clouds of dust and gas - stellar nebula shrinks because of gravity, it becomes hotter and nuclear reactions start in the middle. Nuclear fusion creates an energy for a star.

   The Life Cycle of a Star

   All the stars are born in a giant clouds of dust and gas called Stellar Nebula. There are 3 types of stars: Sun-like stars, Huge stars, and Giant stars. Each of them have different cycle of life. 

   Sun-like stars start with stellar nebula, then it become red giant. After being a red giants, it become cloud of dust and gas called Planetary Nebula. After that, it become a white dwarf, then invisible object called black dwarf.

   Huge stars starts with stellar nebula, then become a red giant. After that it explodes into supernova, and begin collapsing into neutron star.

   Giant stars also start with stellar nebula, then become red giant. After that, it explodes in to supernova, and become a black dwarf.

Planet Profile - Neptune

NEPTUNE

Planet Order: 8th from the Sun.

Distance from the Sun: 4,496 million km

Mass: 1,0243x1026                    Diameter: 49532 km

Rotation: 16 hour 17 min          Revolution: 60,190 days

# of Moons: 13

Neptune is Jovian

Planet Description: Neptune's atmosphere contains hydrogen, helium and methane. There's a white cloud called "scooter", which moves around rather quickly. Neptune is a very windy place.

2 Interesting Facts: 

-In 2011, Neptune will complete its first orbit around the Sun since it was discovered in 1846. 

-There's storm called "Great Dark Spot", because it appears as a dark oval shape on the surface of the planet.

Planet Profile - Venus

VENUS



Planet Order: 2^nd from the Sun.
Distance from the Sun: 108.2 million km
Mass: 4.869x10²⁴                        Diameter: 12,104 km
Rotation: 243,16 days      Revolution: 224,701 days
# of Moons: 0
Terrestrial


Planet Description: Venus has an atmosphere, which contains carbon dioxide and nitrogen. Venus have an ozone layer, which protects the planet from Sun's ultraviolet radiation. This radiation has slowly broken down water molecules into hydrogen and oxygen. As a result, there is very little water left on Venus. It's really hot in Venus, no living thing would ever be able to survive on it.


2 Interesting Facts
  -If you weigh 70 pounds (32 kg) on Earth, you would weigh 63 pounds (29 kg) on Venus;
  -Because Venus is so close to the Earth, it appears as the brightest planet in the night sky.

Hurricane Irene Project

Critical thinking

1. What time of the year do hurricanes occur? Why do they only happen during that time?

   -Hurricanes basically occur in the summer. They happen in this period because hurricane needs warm water to survive. 

2. How can the timing of the tides (high or low) effect the devastation of a hurricane?

   -High tides can affect hurricane, because when the water level in the sea increases, hurricane brings water to the ground, which causes huge damage. 

3. If an area is fully saturated, will a hurricane have more or less impact on an area?

   -If the area is fully saturated, hurricane will have more impact on an area, because the ground is already wet, and flooding can happen easily.

4. How does groundwater saturation affect rivers and streams?

   -Groundwater saturation affect rivers and streams, because the water in the ground goes straightly to rivers and streams, which makes their water level increase.  

 Reflection

1. What is something that you liked about this Mini-project?

   -Something I liked about this project is I learned about different topics. 

2. What was difficult for you on this project?

   -The difficult thing for me on this project was finding information.

3. What would you change about your work on this project?

   -If I could change one thing in my project, it would be my questions about hurricane.

4. How did this project help you learn about Hurricane Irene?

   -This project helped me learn a lot about Hurricane Irene, such as how it forms, its effects and causes.