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IES CAPELLANAAlh. De la Torre

EXAMEN DE CIENCIAS DE LA NATURALEZA 1 ESO CURSO 2006/2007

FECHA:..................... GRUPO:.........................

Nombre del alumno:....................................................................................

TEMA 6: EL AGUA Y LA HI DROSFERA

1.- (1 mark) DI CTATI ON: Dr inking wat er

2.- (1 mark) Tr anslat e int o Spanish:

a) Wat er is very import ant t o us, all li ving t hings need wat er t o live.

_____________________________________________________________________________.b) We need it t o live, and it covers two thirds of t he sur f ace of t he Ear t h.

_____________________________________________________________________________.

3.- (1 mark) Vocabulary. Wr it e t he meaning of t he f ollowing words:

word meaning word meaning

St eam Meander

River Ground wat er

Lake St r eam

Dam Spring

Fresh wat er Sea4.- (1 marks) Find out t he cor rect word and copy t hem in t he chart below:

1) Wat er is constant ly r ecycled on Ear t h. Wat er f alls f r om t he clouds ont o t he Ear t h. I t f lows in rivers

int o t he oceans. The wat er evaporates and t urns into clouds, which will make rain again. What is t his

cycle called? I t start s wit h "W ."

2) Somet imes, liquid wat er f alls f r om clouds in t he sky. I t st ar t s wit h "R." What is it called?

3) What is t he word f or f r ozen wat er? I t st art s wit h "I ."

4) What is t he name of a huge piece of f r ozen wat er t hat f loat s in t he seas? I t st ar t s wit h "I ."

5) Sometimes, f luf f y, f r ozen wat er f alls f r om t he clouds in t he sky. I t st ar t s wit h "S."

6) About half of your body is made of a very special liquid. You need to dr ink t his liquid every day. What

is t his liquid? I t start s wit h a "W ."

7) When a lot of snow collect s on mount ains it can make a river of snow. I t start s wit h "G." What is this

r iver of snow called?

8) Many animals and plant s live in wat er . Can you name a common t ype of animal t hat swims in wat er? This

animals has f ins and br eat hes using gills. I t s name start s wit h "F."

9) What is t he name of a large body of salt y wat er on Ear t h? I t star t s wit h "O." These bodies of wat er

cover t hree quar t ers of t he sur f ace of t he Ear t h.

10)When rain f alls and snow melt s in t he mountains, t he wat er f lows downhill in a large st r eams t hat

t r avel over a long dist ance, empt ying out int o an ocean or lake. What is t his t raveling body of wat er

called? I t st ar t s wit h an "R."

1) 2) 3) 4)5) 6) 7) 8)9) 10)

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5.- (1 pt o. ) Responde r azonadament e a las siguientes preguntas:

a) Por qu se dice que el agua que encont ramos normalment e a nuest r o alr ededor es una mezcla de

sust ancias?

b) Los cambios que suf re el agua dur ant e su ciclo, son qumicos o f sicos?

c) En qu se dif er encian las aguas dulces de las aguas saladas t picas de los mares y ocanos?

d) Por qu es ms alt a la salinidad de los lagos de zonas clidas?

6.- (05 pto. ) Complet a la t abla con las opciones pr opuest as: Luna Sol Vient o - Cambios de t emperatura

Fenmeno Olas Mareas corr ientes mar inas Evaporacin

Causa

7.- (05 pt os.) I ndica dos razones por las que el agua sea f undament al para las plantas.

8.- (05 pt os.) I ndica dos adaptaciones de:

a) las plantas a lugares muy secos

b) los animales al medio acut ico

9.- (1 pt o. ) Responde Verdadero o Falso, razonando tu respuesta en ambos casos:

a) las plant as acut icas hacen la f ot osnt esis, pero no consumen oxgeno

b) los peces no pueden vivir f uera del agua por que en el air e hay demasiado oxgeno

10.- (05 pt os.) I magina un planet a en el que la densidad del hielo f uera mayor que la del agua lquida. Qu

problema habr a en las zonas f r as donde el agua llegara a congelar se?

11.- (1 pt o. ) Dibuj a un esquema del ci clo del agua en el que coloques cor r ect ament e los siguient es t rminos:

evaporacin (mar )-evaporacin (plantas)-evaporacin (aguas super f iciales)-mar-aguas super f ici ales-plantas-

nubes-condensacin-precipit aciones-baj ada (pendient e).

12.- (05 pt os.) Se dice que los motores del ciclo del agua son el Sol y la gravedad. Explica est a af ir macin.

13.- (05 pt os.) En un pequeo pueblecit o cerca de Ant equera, se produjo el verano pasado un devastador

incendio que acab con el 80% de las plant as de la zona. Ahor a, la gent e coment a que las lluvias han disminuido

y que se debe a una maldicin que ha cado sobr e el pueblo. Es cier t o, o exi st e una explicacin cient f ica?.

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