Rationalize the Denominator
The Outer Planets-Jovian Planets
Properties of Nonmetals
Nonmetals share these properties
Low density
Poor conductors of heat and electricity
Not malleable or ductile
Brittle solids or gasses at room temperature
React with metals to form salts
11 Body Systems in 3 minutes
If you could take a look inside this person riding the skateboard you would see an amazing team of different body systems working together.
There are at least 11 body systems that work together to help keep the human body alive.
The muscular system is responsible for movement inside and out of the body. There are three major types of muscles, skeletal muscles which are muscles attached to bones, smooth muscles which are involuntary muscles found inside the stomach, the intestines and several other places, and cardiac muscle which are muscles of the heart.
The urinary system filters blood through the kidneys where it works to filter out waste and produces urine.
The function of the respiratory system is to exchange oxygen and carbon dioxide between the atmosphere and the blood. The lungs are a major organ of this system.
The endocrine system sends chemical messages throughout the body. This system is composed of glands that produce hormones that act as chemical messengers of the body. For example adrenaline is a hormone that causes you to have a sudden burst of energy.
The lymphatic system includes organs and cells that filter lymph and blood and destroy foreign microorganisms.Lymph is the fluid that leaks out of the capillaries. This fluid circulates among the tissue cells and is collected by lymphatic vessels and returned to the veins.
The circulatory system pumps blood throughout your body. It consists of your heart veins that carry blood to the heart arteries that carry blood away from the heart and capillaries which connect the veins and the arteries.
A Guide to Improving Your Grades
Function Notation and Evaluating Functions
How to Calculate Mean-Median-Mode and Range
Numbers and groups of numbers are all around us.
For example, what is the total number of students at your school?
Who is the oldest student or the youngest student?
Who runs the fastest mile and who has the highest test average?
A measure of central tendency is one way to organize data so you can figure out what it is telling you.
Three Measures of Central Tendencies include: MEAN, MEDIAN & MODE.
A measure of central tendency is a single number that is used to summarize all the values of a data set.
For example, you have this group of people. You may want to know if they are all close to the same age, or what is the average height or how many have dark hair ?
What is the mean median and mode of this family?
The ages are 68,10,7,40,36,2.12,65
MEAN - the average of a set of numbers.
Mean and average are the same.
STEPS FOR CALCULATING THE MEAN:
1. Add all of the numbers in the data set
2. Divide by the total number of items in the data set
3. If there is a ZERO, it must be included!
Let’s add the ages together 68,10,7,40,36,2.12,65 = 240
Now let’s divide by the number of numbers in the data set.
If there was a zero it would be included and we have 8 members.
So 240 divided by 8 = 30 so the average age is thirty
Now let’s calculate median
MEDIAN - the number in the center of a data set when the numbers are in order from least to greatest.
STEPS TO DETERMINING THE MEDIAN:
1. Arrange the numbers from least to greatest order.
2. Cross off the greatest and least numbers in the list (at the
same time) until you are left with just one number in the
middle - this is the MEDIAN!
3. If there are two numbers left in the middle, you have to find
the MEAN or AVERAGE of the two numbers.
Find the median of the ages of the family.
68,10,7,40,36,2.12,65
Let's arrange from least to greatest
Since we have an even number we need to take the average of the numbers in the middle.
So the mean or average of 12 and 36 is 48 divided by 2 which equals 24.
If you had an odd number it would just be the number in the middle.
Mode equals the number which occurs most often in a data set. There might be one mode, no mode, or many modes.
Arrange the numbers from least to greatest order.
See if any numbers repeat.
The number that repeats most often is the mode.
What is the mode of the family?
Let’s arrange from least to greatest
2,7,10,12,36,40,65,68
So no number repeats so you have no mode.
If you had this,
2,7,7,7,10,12,36,40,65,68
Then 7 would be the mode.
Finally let’s figure out the range for this data set.
RANGE is NOT a measure of central tendencies, it is a MEASURE OF VARIATION.
It is a measure of the variation between the greatest and lowest numbers in a data set.
Find the greatest number and SUBTRACT the least number.
What is the range of of the family?
Let"s order from least to greatest.
2,7,10,12,36,40,65,68
So the range is 68 -2 which equals 66