Vocabulary 4

electromagnetism: The production of magnetism by electricity and the production of electricity by magnets.

electromagnetic spectrum: All the wavelengths of visible and invisible light in order from short ( gamma rays ) to long ( radio ).

laser: A device that produces a thin steream of linght of just a few close wavelengths.

Vocabulary 3

prism: A cut piece of clear glass (or plastic) with two opposite sides in the shape of a triangle or other geometric shape.

spectrum: A band of colors produced when light goes through a prism.

primary color: Red, green, or blue; mixing these colors can produce all the colors of the spectrum.

primary pigment: Megenta, cyan, yellow; material whith any of these colors absorbs one primany color of linght and reflects the other two.

Pollution Water of River Juan Diaz.

contaminated water from the river Juan Diaz.

Type of pollution is because the water are contamined, when the people trow waste into the river and this overflows.

the type of pollution are destructive of all the flooding that so much trash in the river and destroy many things and everything they have in them.

Solutions to this problem.

This problem is very common, not only in this river of my community, but also in others. The solution would be that people are more careful not littering or polluting our rivers.

Vocabulary 7

dasalination: Getting fresh water from seawater.

Water cycle: The continuous movement of water between Earth's surface and the air changing from linquid to gas bto linquid.

groundwater: Water that seeps into the ground into spaces between bits of rock and soil.

water table: The top of the water-filled spaces in the ground.

aquifer: An underground layer of rock or soil filled with water.

spring: A plance where ground water seep out of the ground.

well: A hole dug below the water table that water seeps into.

reservoir: A storage area for freshwater supplies.

Vocabulary 6

renewable resource:  A resource that can be replaced in a short period of time.

ozone layer: A layer of ozone gas in the atmosphere that screens out much of the Sun's UV rays.

fossil fuel: A fuel formed from the decay of ancient froms of life.

smog: A mixture of smoke and fog.

acid rain: Moisture that falls to Earth after being mixed with wastes from burned fossil fuels.

Vocabulary 5

mineral:  A solid material of Earth's crust a definite composition.

luster: The way light bounces off a mineral's surface.

streak: The color of the powder left when a mineral is rubbed against a hard, roungh surface.

hardness: How well a mineral resists scratching.

cleavage: The tendency of a mineral to break along flat surface.

ore: A mineral containing a useful substance.

gem: A mineral valued for baing rare and beautiful.

nonrenewable resource: A resource that cannot be replaced within a short period of time or at all.

Solar system

 Introduction: Solar system.The solar system is the sun and the objects that aer traveling around it.Our sun is a star similar to other stars in the night sky.
















The solar System is made up of all the planets that orbit our Sun.In addition to  
planets,the Solar System also consists of moons, comets, asteroids, minor planets, and dust and gas.


mercury



The planet mercury is the  closest of the planet to the sun.because this planet lies so close to the sun, and as a result somewhat near to the Earth, it is visible to observers on Earth in night time sky.




Venus



The planet Venus has long been one of the most misunderstood of all the inner planet.Like the Earth, Venus has an atmosphere. 


Earth



Our planet is an oasis of life in an otherwise desolate universe.The Earth's temperature,weather, atmosphere and many other factors are just right to keep us alive.




Mars

Mars excites scientists because its mild temperament is more like the Earth's than any of the other planets.Evidence suggests that Mars once had river,streams,lakes,and even an ocean

Jupiter


Jupiter's great red spot visible in the picture to the right is where a giant storm has been raging for at least 300 yaers.This storm's super hurricane winds blow across an area larger than the Earth.

Saturn


Saturn is a favorite object for many observers.Its beautiful rings are 169,800
miles wide, but lees thick than a football field.In many ways Saturn is similar to Jupiter, but it is much smaller.

Uranus


Uranus is very odd. Unlike all the other planets and most of the moon in our Solar System Uranus spins on its side. It is believed that long ago a very large object smashed into thi planet.

Neptune


Neptune has a giant storm much like the storm on Jupiter. This storm is often called The Great Dark Spot.

CONCLUSION

The diagram below is a computer-generated image that depicts the positions of the Sun and Earth during each season. You can see that the Northern and Southern hemispheres of the Earth receives different amounts of light from the Sun during different seasons.