## Astronomy Wonder Project

How do astronomers determine planets orbit?

For a long time astronomers thought that the planets orbited in a perfect circular shape but Johannes Kepler revealed that their path were not perfect circle. Most planetary orbits are nearly circular but when Kelper carefully observed and calculated he had established that they are not all perfectly circular. From Kepler’s work which was published between 1609 and 1619, he has improved the heliocentric theory of Nicolaus Copernicus, explaining how the planets speed  varies. The planets orbit in an oval shape called ellipse with having the sun be in the middle of it all. Nearly all the planets orbit in the same direction which is counter clockwise except for Venus, Uranus and Pluto, astronomers believe this happens because of the sun’s strong pull of those planets.

https://www.space.com/37054-we-dont-planet-different-orbit-types.html

With the earth being the third planet from the sun with a radius of 6370 kilometers which is 100 times smaller then the suns radius and the distance of 149 million kilometers away. The earth orbits around the sun once per year with the orbit being slightly elliptical in shape, the orbit defines a plane containing the sun. Since the earth orbits around the sun in a elliptical shape, the earth becomes closes to the sun calling it perihelion which happened during the month of January and the earth being the farthest away from the sun during the month of July called aphelion. The earth takes 23.439 hours to completely rotate on its own axis and take nearly 365.266 days to complete an orbit around the sun which is one calendar year.

In conclusion I really enjoyed learning about the planets in orbit. My questions that I have from after doing this project is how do planets in other galaxies orbit? It is the same orbit path as our galaxies?

Sources:

http://nineplanets.org/overview.html, https://www.space.com/37054-we-dont-planet-different-orbit-types.html, http://funnel.sfsu.edu/courses/gm310/handouts/orbit_facts.html, https://en.wikipedia.org/wiki/Kepler%27s_laws_of_planetary_motion

## Desmos Portrait 2018

How I figured out how to use what equations was mostly guess and check, but I did go off of the equations for like linear and quadratic. I found the most challenging thing was to make it look like ourselves. Jayna helped me a lot and we shared equations for different parts of the face. The assignment helped me realize what each equation is for and what kind of lines it makes.

## Peer Teach

For my peer teach Clare and I did field hockey, we had two P.E. classes to teach the class the basic rule, skills and drills to field hockey . We both had made daily plans for what we were going off of during the class which made it seem more organized and efficient. We would take turns to talk to the class and demonstrate. I think through out my peer teach I spoke loud, clearly and made the instructions easy to understand. I enjoyed doing my peer teach and I have realized that I like teaching things that I love.

## Surface Area of a Sphere

For this activity we cut up an orange to make two hemispheres and took all of the orange out from the centre and traced the circumference of the orange on to a piece of paper as many times as you can. After we ripped apart the peel of the orange. we filled the circles that we have drawn with the ripped pieces of orange to make 4 full circles of peel. I learnt that the formula of a sphere is 4 x pi x r^2

My Estimate on how much water the Barrier contains behind in the lake is about 3/4 of the water in Garibaldi lake which is about 4,500,000,000 cubic meters since the volume is 6,099,609,059 cubic meters.

If the Berrier faulted, what do you think would happen. It would wipe out a lot. The weight of the water after the berrier would be broken would be 2,766,764.519 pounds per cubic meter, which could kill someone 35,000 times.

I would think that since the lake is 258.7 meters deep so if the berrier were to break i would imagine that only 3/4 of the water out.

## RAC 2018

This week it is Random Act of Caring week, and I chose a RAC to demonstrate throughout the week. I chose to do something for a close friend.

I met this girl at the beginning of the year and since then we have grown closer and closer everyday. I know in the past she has had struggles with friends and so i am so glad that she has found my friends and i. On Friday as couple of friends and i went to Dairy Queen but she could not come since she is working so hard on the backstage stuff of the school musical. I felt bad that we went and she was stuck at school so i decided that i would get her something and bring it back to her. i decided to get her a cookie ice cream cake and run it back to school with a bunch of spoons so we could give it to her and we could all enjoy it together.

What did you notice about the people who benefited from the RAC?

Since she has had a long day at school you could tell that she was grateful that we came back for her and she was vary surprised that we brought her a cake to all share.

What did you notice about yourself?

I notice that i could not take the smile i had on my face away. i knew that she was not expecting it so it felt good to see her face light up and make her day better. i also realized that even something small can make all the different to others. She was with others doing the lighting and they joined with eating that cake to and you could tell that they were grateful to have some ice cream in them as well.

How did performing a RAC contribute to your personal awareness and responsibility?

Performing the RAC helped me to  be aware that even something small for someone can do all the difference. i realized that i should do more little things for people because it makes them feel good as well it makes me feel good.

Did you enjoy this RAC? Would you do it again? Would you change it, if so, how?

I really enjoyed doing this RAC and i would for sure do it again. It is going to be my goal to do more RAC and to do it in different ways, like making new friends, helping someone with something and so many other ways.