Looking at the Earth

a.	environment	d.	artifacts	
b.	axis	e.	Southern Hemisphere	
c.	sun	f.	Earth	

	1.	“half sphere” 0° to 90°S latitude

	2.	third planet from the sun

	3.	humans’ natural surroundings

	4.	tools and pottery from the past

	5.	center of the solar system

	6.	imaginary line running through the earth’s center

a.	the moon	e.	3651/4	
b.	plateau	f.	Mariana Trench	
c.	geography	g.	isthmus	
d.	Mt. Everest	h.	231/2	

	7.	a narrow piece of land that connects two larger pieces of land

	8.	the study of the earth in all its variety

	9.	number of days it takes the earth to travel around the sun

	10.	a cold, rocky sphere with no water or atmosphere

	11.	lowest spot on the earth’s surface

	12.	flat area at a high elevation

	13.	highest spot on the earth’s surface

	14.	number of degrees that the earth is tilted on its axis

	15.	The area that surrounds the earth’s core is called the ____.

	16.	The angle of the sun’s rays causes the ____.

	17.	The day with the fewest hours of sunlight occurs in the Northern Hemisphere in the ____.

	18.	Off each coast of a continent lies a plateau called a(n) ____.

	19.	Water, wind, and ice move weathered material through a process called ____.

	20.	The earth’s crust includes ocean floors and ____.

	21.	Dangerous rays from the sun are screened out on the earth by the ____.

	22.	Plates that form the earth’s crust float on liquid rock in the ____.

	23.	Weathering is a process that ____.

	24.	The earth’s 1,000-mile (1,609-km)-thick cushion of gases is called the ____.

	25.	The point where a river empties into another body of water is called its ____.

	26.	Plains and mountains are examples of ____.

	27.	About 70 percent of the earth’s surface is ____.

	28.	The movement of the earth’s huge land masses is known as ____.