Primary economic activities are defined as extracting raw materials. This includes mining, arable and pastoral farming, forestry and fishing.
Secondary economic activities include manufacturing good using raw materials. An example could be anything made in a factory, such as cars or processed foods, to a house or roads.
Tertiary economic activities provide services and good to people. Teachers, shops and doctors provide tertiary economic activities.
1. Declines in primary sector employment
Machines take away the need for manual labor in the primary economic sector.
As there is often higher paid jobs in the tertiary economic sector people begin to get an education and aim for jobs in the tertiary sector instead.
2. Decreases in infant mortality rate
Education of basic health care helps communities give a child a healthy environment growing up.
More availability of medical resources and professionals help to treat the illnesses that could cause the death of an infant.
3. Improvements in women's social status
Higher education for both women and men encourages gender equality.
Women become less dependent on men with more education and can gain better jobs and equal social status.
Answer: 
Explanation:
We need to know the volume of the cone that can be filled with bubble gum ball, but firstly we need to calculate the volume of the cone 
and the volume of the buble gum ball (a sphere) 
:
<u>Volume of the cone:</u>
(1)
Where:
is the radius of the cone
is the height of the cone
(2)
(3) This is the volume of the cone
<u>Volume of the gum ball:</u>
(4)
Where:
is the radius of the sphere (half the diameter)
(5)
(6) This is the volume of the gum ball
Know we are able to find the closest approximation of the volume of the cone that can be filled with bubble gum ball, by calculating the difference or substracting (6) from (3):
(7)
Finally:
(8)
A slow change to the earth's surface would be the formation of mountain ranges over millions of years due to the shifting of tectonic plates under the earth. Also, another slow change could be considered erosion or weathering. Two rapid changes could be landslides and earthquakes.
A rift zone sometimes occurs in some volcanoes, more so in the shield volcanoes. It is made up of a linear series of fissures in the volcanic edifice. Lava can erupt from this, let us call it volcanic flank, instead of it's summit. Rift zones tend to extend for dozens of kilometers. Volcanoes have an elongated shape because of the repeated eruptions from these rift zones.
It is affected by the rotation on the earth's axis
