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Human activities have had major affects on our planet "Earth". We are responsible for the destruction of animal habitats and re-forestation. During the 19th century (1800), we have released tons of carbon dioxide into the atmosphere causing temperatures to rise and melt Polar Ice Caps.

Oil is a nonrenewable natural resource, once it is used it can not be re-formed.

Water is an inexhaustible natural resource.​ Water is also covered at most of the parts of the Earth and is used for transportation.

The picture shows of a basketball **__rotating__,** movement of an object in circular motion, just like how earth would be when it turns night and day.



Now it shows a tennisball **__orbiting ​__** around the basketball, representing the earth and the moon when it's rotating around the sun. Gravitation is whe object with **__mass__** attract one another. In everyday life gravitation is most familiar as the agent that lends **__weight__** to objects with mass and causes them to fall to the ground when dropped. It is responsible to keep the moon in it's orbit around the earth ;for the formation of __**tides**__ ; by which fluid flow occurs under the influence of **__gravity__** and __**density**__ gradient.

__**Photosynthesis**__ is a process that converts carbon dioxide into organic compounds, especialy sugars,using energy from sunlight. Photosynthetic organisms are called photoautotrophs, since they __**produce**__, or create their own food. In plants, algae uses carbon dioxide and water, releasing __**oxygen**__ as a waste product.

A __**herbivore**__ is a human/animal that is adapted, evolutionary process whereby a population becomes better suited to its habitat, to eat plants, and only plants.

A **__carnivore__** meaning meat eater is an organism that derives its energy and nutrient requirements from a diet. Animals that depend solely on animal flesh for their nutrient requirements are considered obligate carnivores.

__**Omnivores**__ are species that eat both plants and animals as their primary food source.Various mammals are omnivores by nature, such ashumans, pigs, bears, opossums and chipmunks. Also some primates are omnivorous including chimpanzees. Various birds are omnivores,whose diet varies from berries and nectar to insects.


 * __Ecosystem__** is the whole group of living and nonliving things that make up an environment and affect each other.

__**Environment**__ is the surrounding conditions or forces (as soil, climate, and living things) that influence the form and ability to survive of a plant or animal or ecological community.

A __**consumer**__ is a person or thing that consumes,or to absorb completely. A person who buys goods or services for his own needs and not for resale :opposed to producer.


 * __Producer__** is a person or thing that produces. One who produces goods and services :opposed to consumer (example:plants)

__**Lunar cycle**__ :The moon exhibits different phases as the relative geometry of the Sun, Earth and Moon changes, appearing as a full moon when the Sun and Moon are on opposed sides of the Earth.One half of the lunar surface is always illuminated by the Sun. The moon has 8 phases:waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, last quarter, waning crescent, and new moon.


 * __Sediment__** is a solid fragment of an inorganic or organic material that come from the weathering of rock and is carried/deposited away by wind, water or ice.The material can be originating on the land or originating in the ocean.

__**Sedimentary Rock**__ are formed by the accuuilation of sediments. Examples of sedimentary rocks are coal, limestone, rock salt, sandstone, shale and siltstone. For example, sandstone is a clastic sedimentary rock made up mainly of sand-size weathering debris.Environments where large amounts of sand can accumulate include beaches, deserts, flood plains and delta.

A __**Season ​**__ is a division of the year, marked by changes in weather, ecology, and hours of daylight. There are 4 season's each year; summer, fall/autumn, winter and spring.

__**Minerals**__ are inorganic crystalline compounds formed by natural processes. Many minerals are the raw materials from which metals are extracted; others are used as gemstones.


 * __Fossils__** are the preserved remains of traces of animals and plants from the past.

An __**Atmosphere**__ is a layer of gases that may surround a material body of mass.Just as there are layers inside the Earth, there are also layers in the atmosphere.The layers interact, heat up, with the top layer of Earth's crust. Sometimes you feel the atmosphere as a cool breeze. Sometimes it is really hot and humid day that seems to push on you from all sides.



​ minerals

the sun is a producer

Sedimentary rocks