General Science

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1.
1 point
Sounds travels fastest through
2.
1 point
In order to use water on board ship for boilers, the water must first be
3.
1 point
The most abundant metal in a free state in the Earth's crust is
4.
1 point
An object will most effectively absorb the sun's rays if it is
5.
1 point
The most effective farming method for returning minerals to the soil is
6.
1 point
An example of a lever is
7.
1 point
A lunar eclipse occurs when the
8.
1 point
The part of the body that would suffer the most from a diet deficient in calcium is the
9.
1 point
Which of the following is found in greatest quantities in automobile exhaust gases?
10.
1 point
Which common electrical device contains an electric magnet?
11.
1 point
In a vacuum, radio waves and visible light waves must have the same
12.
1 point
The most accurate description of the earth's atmosphere is that it consists
13.
1 point
Object A with a mass of 2 kilograms and object B with a mass of 4 kilograms are dropped simultaneously from rest near the surface of the earth. Neglecting air resistance, at the end of 3 seconds, what is the ratio of the speed of object A to the speed of object B?
14.
1 point
In June, a weather station in a New England city reports a falling barometer and winds coming out of the southeast. The best weather forecast is probably
15.
1 point
Which substance can be removed from water by filtration?
16.
1 point
As a balloon rises, the gas within it
17.
1 point
The best estimate of the age of the earth comes from the study of
18.
1 point
The presence of coal deposits in Alaska shows that, at one time, Alaska
19.
1 point
When an airplane is in flight, the air pressure on the top surface of the wing is
20.
1 point
In the human eye, which structure is like the film in a camera?
21.
1 point
When water is taken apart by electricity, what two substances are formed?
22.
1 point
Compounds are created when
23.
1 point
The three elements found most commonly in commercial fertilizers are
24.
1 point
Two non-porous rocks seem to lose the same weight when a string is attached to each and they are submerged in water. These two rocks must have the same
25.
1 point
The thermos bottle is most similar in principle to