How to find the GCF of 24 and 40.
I like to use a factor to find the GCF of 40 and 24.
The GCF is the largest number that divides evenly into two or more numbers.
After finding the prime numbers you just multiply the pairs of prime numbers.

How to find the GCF of 30 and 45.
I like to use a factor to find the GCF of 45 and 30.
The GCF is the largest number that divides evenly into two or more numbers.
After finding the prime numbers you just multiply the pairs of prime numbers.

Learn how to use a factor tree and the prime numbers for 7 and 8 in order to find the least common multiple ( LCM ) of 7 and 8 and the GCF or greatest common factor for 8 and 7.

The Least Common Multiple ( LCM ) of 7 and 8 equals 56
The Greatest Common Factor ( GCF ) of 7 and 8 equal 1

The scientific method is a systematic method for solving problems. In this video, I review 6 steps of the scientific method.

Step 1. State the problem in a question
Step. 2 Research
Step 3. State a hypothesis
Step 4. Experiment
Step 5. State results
Step. 6 State your conclusion

The earth rotates around an imaginary axis in a counterclockwise direction.

This rotation causes our daytime and night time.

If you find a simple globe, turn off the lights, point a flashlight at the globe, and spin it counterclockwise will you will notice the following. As the earth rotates notice how the east coast of Australia moves into the sunlight first, and then notice the last part of Australia to receive sunlight is the west coast.

So in the morning when you look at the sun rising you are looking east.

In the evening when you see the sunset you are looking towards the west.

The sun rises in the east and sets in the west only two times a year in each hemisphere

In the northern hemisphere on March 20, which is the first day of spring also called the vernal equinox the sun rises due east. Moving forward the sun then starts setting more northeast. The sun continues to set a little more northeast each day until June 20 or 21 which is the first day of summer also called the summer solstice. After the summer solstice, the sun starts setting less to the north until September 22 which is the autumn equinox or the first day of autumn on this day the sun sets due east again.

After this day it will rise a little further southeast until December 21 or 22 which is the first day of winter also called the winter solstice.

After this day it sets a little less south until March 20, which is the spring equinox.