Asvab General Science

Front 1

building blocks of sugars, and the substances used by plants in photosynthesis

Back 1

H2O and Co2: In photosynthesis, water is split, oxygen is given off as a waste product, and hydrogen is combined with carbon dioxide to form sugars

Front 2

normal body temperature of a person

Back 2

37° centigrade (Celsius and centigrade are the same thing. Water boils at 100° centigrade or 212° Fahrenheit).

Front 3

A liter is about the same as...

Back 3

...a quart: A liter is slightly larger than a quart. There are about 33 ounces in a liter, while a quart has 32 ounces.

Front 4

When heat is added to water, the added energy...

Back 4

...makes the molecules move faster. Adding heat to water gives the molecules more kinetic energy, resulting in faster motion. It does not change the energy level of electrons or the number of electrons in the molecules.

Front 5

Look at the graph of someone's blood sugar after he or she had been injected with a substance. Which of the following statements is true?

Back 5

The person's blood sugar level fell faster than it rose. The slope of the line is a measure of the rate. Anyone who is injected with insulin has the same type of response.

Front 6

Two masses fall 3 meters to the ground. If friction is neglected, when they reach the ground...

Back 6

...both masses have the same speed. (The acceleration of objects in freefall is independent of mass, resulting in the same speed at the end of a fall. The momentum and energy are proportional to the mass).

Front 7

The electric current in a metal conductor is carried by...

Back 7

...electrons (the only charges free to move in a metal).

Front 8

Which of the following statements about diffusion is false?

Back 8

FALSE: Diffusion requires energy to do its work.
(Diffusion is the movement of molecules of liquid from a greater to a lesser concentration. The diffusion of water is osmosis, and no energy is required as these molecules move down a concentration gradient).

Front 9

Result of the angle of tilt that the Earth has on its axis

Back 9

summer and winter (Day and night are the results of the rotation of the earth. Continental drift is often offered as evidence of plate tectonics. While the variable star field may be affected by planetary tilt, the position of the observer relative to the star field is also a major factor. The seasons, choice B, are the result of the directness of the Sun's rays hitting Earth's surface. The primary factor controlling directness of the rays of the Sun is planetary tilt).

Front 10

composite cone (volcano)

Back 10

The hallmark of a composite cone composition is the mixture of cinder cone characteristics (granitic debris, very steep cone profile, and explosive eruptions) with shield cone characteristics (large footprint with gently sloping sides, basaltic debris, and lava flows).

Front 11

When air masses meet, why does warm air rise over cooler air, often causing rain?

Back 11

Cooling air can hold less water vapor than warmer air. (The motion of the warmer air over cooler air is due to differing densities, but it is the drop in temperature due to increased elevation and contact with cooler air (among other things) that causes the rain. As air cools, its capacity to hold water vapor decreases. As the saturation point is reached, excess water vapor condenses on particles in the air and eventually can fall as rain).

Front 12

The process of dividing one cell nucleus into two nuclei:

Back 12

Mitosis. (Mitosis is nuclear division, cytokinesis is cell division, and meiosis is used for sex cell production).

Front 13

Sodium ions have a charge of +1. This is because...

Back 13

...they have one more proton than electron. (Protons have a positive charge and electrons have a negative charge.)

Front 14

Electrons are negatively charged and are found outside the nucleus.

Back 14

Both protons and neutrons exist in the nucleus, while electrons orbit the nucleus.

Front 15

: In the lever shown below, a force is exerted on the left side to lift the mass on the right. Assuming the lever is ideal, which of the following is the same on both sides?

Back 15

WORK. The work done by the force is the same as the work done on the load in an ideal simple machine.

Front 16

Vaccines work well because they prepare one's...

Back 16

...memory cells. (Memory cells help us mount quicker responses to antigens we have previously encountered.)

Front 17

Components of an ecosystem

Back 17

producers, consumers, and decomposers

Front 18

The process by which energy is provided at the cellular level

Back 18

metabolism

Front 19

Light waves rate of travel:

Back 19

about 186,000 miles per second

Front 20

The stomach contains chemicals that break down:

Back 20

proteins

Front 21

Red blood cells

Back 21

carry oxygen and carbon dioxide

Front 22

Cell protoplasm is made up mostly of:

Back 22

water

Front 23

Conduction

Back 23

Method of transfering heat between two parts of a stationary system, caused by a temperature difference between the parts.

Front 24

Light waves move at a higher frequency than:

Back 24

infrared waves

Front 25

The atomic number of an atom is determined by:

Back 25

Number of protons

Front 26

The surface of the earth is called the:

Back 26

crust

Front 27

A seismograph measures the:

Back 27

the waves of an earthquake