PREZI SERENA WILLIAMS

I have made a prezi about Serena Williams with one of my classmates. Here you have the link.

http://prezi.com/p0of_1hrv-ff/?utm_campaign=share&utm_medium=copy&rc=ex0share

I hope you like it.

VOCABULARY UNIT 5 AND 7

UNIT 5

Elderly: Old person

Toddler: Child that stars to walk.

Eventually:  At some later time.

Properly: Correct

Sleepover: An instance of sleeping over, as at another person's house.

Variety show: Weird performance

Invite over: Bring your friends to your house

Worried: Concerned

UNIT 7

Bite:  To cut or tear with the teeth.

Sting: to prick or wound (a person or animal) with a sharp-pointed part of the body

Shy: Timid

Polite: Showing good maners

Serious: Important or significant

Helpful: Servitial.

Run away: Escape.

THE TUNGSTEN

THE TUNGSTEN

It is the chemical element with symbol W and atomic number 74.

It is a rare metal in the earth's crust, it is in the form of oxide and salts in certain minerals. It is gray, very hard and tense and has the highest melting point of all metals and the highest boiling point of all known chemical elements, which are: Melting: 3422 degrees celsius Boiling: 5930 degrees Celsius

Tungsten is the heaviest element used by living things

Tungsten and its most popular alloy, tungsten carbide are both excellent neutron reflectors, tungsten crystals are so compressed that they turn out to be effective shields against radiation of any kind.

Approximately half of the tungsten is consumed for the production of hard materials 

In its pure state it is used in the manufacture of filaments for electric lamps, resistors for electric ovens etc.

Tungsten, usually alloyed with nickel and iron or cobalt to form heavy alloys, is used in kinetic energy penetrators.