1 The graph below represents the brightness and temperature of stars visible from Earth.

Which location on the graph best represents a star with average brightness and temperature?

(1) A        (3) C
(2) B        (4) D

1         2         3         4        

2 The length of an Earth year is based on Earth's

(1) rotation of 15o/hr
(2) revolution of 15o/hr
(3) rotation of approximately lo/day
(4) revolution of approximately lo/day

1         2         3         4        

3 Earths hydrosphere is best described as the

(1) solid outer layer of Earth
(2) liquid outer layer of Earth
(3) magma layer located below Earth's stiffer mantle
(4) gaseous layer extending several hundred kilometers from Earth into space

1         2         3         4        

4 The passage of the Moon into Earth’s shadow causes a

(1) lunar eclipse       (3) new Moon
(2) solar eclipse        (4) full Moon

1         2         3         4