Tuesday, June 6, 2017

Matter

 I watched a couple of brainpop videos about matter. I decided to share my newly refreshed knowledge.

Summary of Knowledge:
(Measuring Matter)

Mass, Volume and Density are all physical properties of matter that are used to measure matter. Matter is anything that has mass, and volume. We measure matter to identify unknown substances, compare substances, and standardize those measurements. To find the mass of an object, measure the object on a digital scale, or a triple beam balance. This method is successful because on milliliter is equivalent to 1 cubic centimeter. To find the volume of an object, multiply it's dimensions, (length x width x height) or displace that object in water. Density is the measure of how tightly packed the atoms are inside of it. To find the density of an object, divide mass/volume.

Summary of Knowledge:
(States of Matter)
Matter is anything that has mass and volume. Matter is made up of atoms. Atoms can chemically combine with other atoms and form a new molecule, or substance. A substance made up of only one type of atom is called an element. The periodic table of elements lists all the known elements that chemically combine with other types of elements to form everything else! Solids, liquids, and gases are all made up of atoms. Liquids have a fixed volume, but not a fixed shape. The atoms inside of a liquid vibrate and slide past one another. If you increase the temperature of a liquid, and reach it's boiling point, it will become a gas. But no matter how many times that substance changes states, the chemical composition stays the same. Water is made up of H20. If you boil liquid water, it becomes steam. But that steam is still made up of H2O. Gases don't have a fixed volume, or a fixed shape. The atoms inside of a gas are very spread apart, and they move around unexpectedly. If you freeze liquid water, it becomes solid ice. Ice has a fixed volume, and a fixed shape. Atoms inside of a solid are packed tightly together and vibrate in place. Other than solids, liquids, and gases there are a couple of other states of matter. Plasma is an electrically charged gas. Colloids are mixtures that contain two separate phases of matter. Bose-Einstein condensate is a state that can only be created in a lab because the temperature is close to absolute zero.

Thursday, June 1, 2017

Lesson 6: Five Number Summary

Welcome to the sixth part of the Data Analysis Series! In this lesson we will be learning how to find the five number summary.

Lesson 6: Five Number Summary

What is a Five Number summary? A summary of all the main points within a data set, splitting it into four sections each with a value of 25%

Here is an example of a data set.
68, 73, 78, 80, 83, 85 , 86, 90, 96

The first part of the five number summary is the minimum, the number with the least value (68)

The second part of the five number summary is the maximum, the number with the greatest value (96)

The third part of the five number summary is the median, the number in the middle (83)

The fourth part of the five number summary is the lower quartile, the median of the lower half (75.5)

The fifth part of the five number summary is the upper quartile, the median of the upper half (88)

Lesson 5: MAD

Welcome to the fifth part of the Data Analysis Series! In this lesson, we will be learning about calculating MAD.

Lesson 5: MAD

What is MAD? MAD is the summary of how much the values in a data set vary or clutter.
This is an example of a data set.
10,11,11,12,13,15

To find the MAD of a data set, we first have to find the mean of all the numbers.
10+11+11+12+13+15= 72
72/6 = 12

Next, we have to find the absolute value of the mean (12) and each of the numbers in the data set.
l10-12l = 2
l11-12l =1
l11-12l =1
l12-12l =0
l13-12l =1
l15-12l =3

Then, we have to find the mean of these new numbers.
2+1+1+0+1+3= 8
8/6= 1.3333333..

So, 1,333333.. is the MAD of the data set.

Lesson 4: Histograms

Welcome to the fourth part of the Data Analysis Series! In this lesson, we will be learning about histograms.

Lesson 4: Histograms

What is a Histogram? A histogram is a diagram consisting of rectangles whose area is equal to the amount of a variable and its width is equal to the interval.

This is an example of a Histogram.

Now let's answer some questions!

How many hours were studied? 5+4+3= 12

Which interval does the median fall? 4-5

How many hours were studied for students 4-5 and over? 4+3= 7



Wednesday, May 31, 2017

Lesson 3: Unknown Values (Mean)

Welcome to the third part of the Data Analysis Series! In this lesson we will be learning about unknown values. (mean)

Lesson 3: Unknown Values (Mean)
What is an unknown value in a mean question? A question that asks for the unknown value in a data set.
This is an example of an unknown value mean question:
Katie buys 6 hair ties. These are the costs of the hair ties: 16,19,22,30.50,41.50,___The mean price is 25.50. What is the cost of the 6th hair tie?

There are two ways to solve this problem:
Trial and Error: Add up all of the known values. Divide by the number of units (in this case, hair ties). Trial and Error the unknown value until you reach the correct mean. Check your work.
16+19+22+30.50+41.50= 129
Unknown value: 24
Checking:
16+19+22+30.50+41.50+24= 153
153/6= 25.50

Backwards: Add up all of the known values. Multiply the number of units (in this case, hair ties) by the mean. Subtract the known values from the product of the units and mean. Check your work.
Example:
16+19+22+30.50+41.50= 129
25.50x6= 153
153-129= 24
Checking:
16+19+22+30.50+41.50+24= 153
153/6= 25.50


Lesson 2: Observing Dot Plots

Welcome to the second part of the Data Analysis Series! In this lesson, we will be learning about observing dot plots.

Lesson 2: Observing Dot Plots

What is a Dot Plot? A Dot Plot is a numerical chart that organizes various numbers on a plot.

This is an example of a Dot Plot. First, we have to organize the numbers in order of value.
1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 5, 5, 5

Now, let's answer some questions!

How many people were surveyed?  28

How many people had 4 family members or more? 5

What is the median number of family members in this survey? 3

What is the mean of family members in this survey? 2.78

Lesson 1: Mean, Median, Mode and Range

This week I am taking a test on Data Analysis. I am going to make a series of blog posts covering each of the standard topics that I will be tested on this Friday.

Lesson 1: Calculating Mean, Median, Mode and Range.
In this lesson we will be using the numbers from this example:
20, 22, 22, 26, 27, 29, 32
To find the mean in a data set, add all of the numbers and then divide the total by amount of numbers that are in the data set.
Example:
20+22+22+26+27+29+32= 178
178/8= 22.25

To find the median in a data set, simply cross out one number at a time on each side.
Example:
20, 22, 22, 26, 27, 29, 32
The median in this data set is 26.

To find the mode of a data set, identify which number is used the most.
Example:
In this data set 22 is the mode because it is used twice, and all the other numbers are only used once.

To find the range in a data set, subtract the maximum from the minimum.
Example:
32-20= 12


Monday, May 15, 2017

Motivational Speech Practice

I have always thought about the question,
"What do you want to be when you grow up?"
And after 12 years of contemplation, I have come to the conclusion that I would like to be a Motivational Speaker. So I decided to practice. I took some of my ideas from the nike motivational video called "Rise and Shine, Welcome to the Grind" Here is my practice speech, inspired by that video.

Leave No Dream Behind
Lauren Kennedy
What do you want in life? Just ask yourself that, you don’t need to come up with the answer right away, just think. Never let anybody tell you that you can't. Never let anybody tear you apart. I know it may seem hard now, but the only person that is stopping you is yourself.

One step toward living your dreams is to become friends with yourself. Becoming friends with yourself can give you Confidence, Honesty, Trustworthiness, Respect, Humbleness, and many more qualities that can help you live your life to the greatest potential. It doesn’t matter how many tiny voices inside your head tell you otherwise, because everyone starts somewhere. Just Start. You can only achieve your dreams if you are sure of yourself. If you can accept who you are, if you can accept the fact that you do and will make mistakes, if you can accept that one day you will get there. And the only way to do that is, to Believe.

Believe in who you are and who you can be. You can only pursue your dreams when you have the drive and determination to do so. Don't listen to the thousands of thoughts racing through your mind telling you can’t do it. Because you can. You have always been able to. Now, it the time to start the journey. Because the remainder of your journey will only be against yourself. You will only feel satisfied at the end. When you can genuinely tell yourself, “I did It!” and feel proud. Because in the end, you have something to be proud of, you have always had something to be proud of, and that is... you!
Now is the time, leave no dream behind.

Some important points I took from the video were:


“Calm the thoughts that tell you, you aren’t good enough. Believe in the ones that tell you, you belong.” – Lauren Kennedy

Surface Area VS Volume

In math we are learning about Surface Area and Volume. I was talking to my peers this morning, asking them, "Which one is harder? Surface Area? Or Volume?" Four of seven students think that Surface Area is harder. This is why I am going to explain how to calculate Surface Area and Volume today.

Here is an example of a Three-Dimensional prism.
To find the Surface Area of this rectangular prism we first have to multiply the dimensions to find the area of each face. To find the Area of the top and bottom faces, we would multiply 4x3x2= 24. To find the area of one of the sets of faces, we would multiply 4x5x2= 40. To find the other set of faces, we would multiply 3x5x2= 30. Now, because we have all the calculations, we have to add the area of the faces together. 24+40+30= 94, so the Surface Area of the rectangular prism is 94 units squared.

To find the Volume of the prism we would multiply 3x4x5= 60, so the Volume of the rectangular prism is 60 units cubed.

It amazes me how the same three-dimensional prism has such different answers to their Surface Area, and Volume.


Saturday, February 25, 2017

What does light have to do with photography and photograph?

I was studying my science quizlet on growing and flowing vocabulary flashcards, one of the questions was about phototropism. Phototropism: The tendency for a plant to grow towards light.
I know that the prefix "photo" is used in "photosynthesis" and based on this I can infer that "photo" means light. So what does photography or photograph have to do with light?

After some research I found that,
"Photography is the science, art, application and practice of creating durable images by recording light or other electromagnetic radiation." - Wikipedia
This helps me understand that by taking a picture you are recording light. That is why the prefix "photo" is used in the words photography and photograph!


(Pictures taken from www.cnet.com and www.pcwallart.com)

Friday, February 24, 2017

How Soil Conservation Could Affect Our Lives in 2050

In Social Studies this week we learned about Black Death.  I was wondering, "How many people did the Black Death kill?" and history.com said,
"In the 14th century, a devastating plague known as the Black Death claimed an estimated 75 million lives." - www.history.com
I know that the earth's population is about 7 billion people. And I remember a while back, we learned about how to conserve the soil. I found a website that stated why soil conservation is so important.
"Our team is tasked to solve this problem: 'How to feed the 7 billion people already on Earth today plus another 3 billion by 2050?' Feed 10 billion. And we can’t wait till 2050 to start. The clock’s ticking. We’re already at the tipping point. We must start planning now." - www.marketwatch.com
This research made me wonder, will we lose a good amount of earth's population in 2050?
I will be alive then, will we go through the population loss that Europe went through in 1348?
After that, I searched for all the ways that are/could be used to conserve the soil.
1) Plant Trees
2) Build Terraces
3) No-till farming
4) Contour Plowing
5) Crop Rotation
6) Maintain soil pH
7) Watering
8) Salinity Management
9) Promote helpful Soil organisms
10) Grow indigenous crops
Many of these strategies that were listed, I learned in class. But I did not know numbers 6,8, or 10. I found that, "The contamination of soil by addition of acidic or basic pollutants and due to acid rains has an adverse effect on the soil pH. Soil pH is an indicator of the level of nutrients in soil. The uptake of nutrients by plants also depends on the pH of soil. Maintaining the correct value of soil pH, is thus essential for soil conservation." -buzzle.com
This makes so much more sense, I understand the purpose of maintaining soil ph. But before reading this article, I did not know that pH was an indicator of soil nutrients, and by keeping track of this, we know if plants can grow here.

This is an image of a soil pH tester

I also found that salinity management Is important because, "The salinity of soil increases due to excessive accumulation of salts in the soil. This has a negative effect on the metabolism of crops. The salinity of soil is detrimental to the vegetative life in it. The death of vegetation leads to soil erosion. Hence, salinity management is an indirect way of conserving soil." -buzzle.com
I did not know that there are actually salts in the soil, but I do know that salt (not the same one that is used in the soil) causes high blood pressure. But I didn't know it affected the metabolism of crops!!! I didn't even know crops have metabolism!!! I now know that by managing the salinity in the soil, we can help prevent erosion and plant death.




I also found that, "Planting native crops is beneficial for soil conservation. If non-native plants are grown, fields should be bordered by indigenous crops to prevent soil erosion, thus achieving soil conservation." -buzzle.comI never knew this! I guess this explains why I can't row avocadoes in my backyard! I didn't know that by planting native crops we can help prevent soil erosion. Fascinating! 😄



In conclusion, I have found more information on ways to help conserve the soil, and because I can see what a big impact the soil could make on the human population in the future, I am going to water the plants this weekend!
(Pictures also taken from -Buzzle.com)