1.
The layer of gas covering the earth is called:
A. 
B. 
C. 
D. 
2.
The speed of light has been calculated to be 186,000.
A. 
B. 
C. 
D. 
3.
A distance of one mile is about:
A. 
B. 
C. 
D. 
4.
The largest object in the solar system is:
A. 
B. 
C. 
D. 
5.
Which of the following is most responsible for erosion?
A. 
B. 
C. 
D. 
6.
Which of the following is most responsible for earthquakes?
A. 
B. 
An imbalance in the crust
C. 
D. 
7.
When a scientist uses the process of reasoning, it means that he
A. 
B. 
Does not need to make observations
C. 
Makes inferences on the basis of observations
D. 
Does not need to make a hypothesis
8.
An instrument that is used to map the ocean floor is called?
A. 
B. 
C. 
D. 
9.
When scientists refer to the hydrosphere, they mean:
A. 
B. 
C. 
D. 
10.
Chemical elements that are usually present in only very small amounts are called?
A. 
B. 
C. 
D. 
11.
The Milky Way is a
A. 
B. 
C. 
D. 
12.
The brightest star in the sky other than our sun is:
A. 
B. 
C. 
D. 
13.
A scale of temperature that uses absolute zero, the lowest possible temperature for its zero points is called
A. 
B. 
C. 
D. 
14.
The force of attraction between the earth and the moon is called
A. 
B. 
C. 
D. 
15.
The moon’s gravity is _____________ that of the earth’s.
A. 
B. 
C. 
D. 
16.
Which of the following did Sir Isaac Newton discover?
A. 
B. 
C. 
D. 
17.
Why is it warmer in regions near the equator?
A. 
Regions near the equator have thicker atmosphere.
B. 
Regions near the equator get vertical rays from the sun.
C. 
Light is changed to heat faster near the equator.x
D. 
There is more pollution in that area.
18.
What is the important animal hormone responsible for the control of glucose levels in the blood?
A. 
B. 
C. 
D. 
19.
A 1,000-kilogram car traveling with a velocity of +20. meters per second decelerates uniformly at -5.0 meters per second2 until it comes to rest. What is the total distance the car travels as it decelerates to rest?
A. 
B. 
C. 
D. 
20.
What yellowish-orange compound belonging to the vitamin B complex is used to treat pernicious anemia? It is synthesized in the intestinal bacteria and occurs in green plants, fresh fruit, liver, and yeast. Its formula is C19H19N7O6.
A. 
B. 
C. 
D. 
21.
The reaction 2H2O(l) --> 2H2O(g) + O2(g) is forced to occur by use of an externally applied electric current. This procedure is called
A. 
B. 
C. 
D. 
22.
A student calculated the percent by mass of water in a sample of BaCl2 * H2O to be 16.4% but the accepted value is 14.8%. What was the student’s percent error?
A. 
B. 
C. 
D. 
23.
The symmetrical structure of the CH4 molecule is due to the fact that the four single bonds between carbon and hydrogen atoms are directed toward the corners of a:
A. 
B. 
C. 
D. 
24.
How much work is done on a downhill skier by an average braking force of 9.8 X 102 newtons to stop her in a distance of 10 meters?
A. 
B. 
C. 
D. 
25.
What is the absence of measurable electrical resistance in certain substances at temperatures close to zero degrees Kelvin?
A. 
B. 
C. 
D.