ASVAB General Science Practice Test 521208 Results

Your Results Global Average
Questions 5 5
Correct 0 3.00
Score 0% 60%

Review

1

Blood is created in:

68% Answer Correctly

red blood cells

bone marrow

the heart

the liver


Solution

Blood is created in bone marrow and is made up of cells suspended in liquid plasma. Red blood cells carry oxygen, white blood cells fight infection, and platelets are cell fragments that allow blood to clot.


2

-40°F is how many °C?

40% Answer Correctly

\({40 \over 9}\)

-40

-8

\(-{40 \over 9}\)


Solution

The formula to convert from F° to C° is:

\(C° = {5 \over 9} (F° - 32)\)

plugging in our values gives:

\(C° = {5 \over 9} (-40 - 32)\)

\(C° = {5 \over 9} (-72) = {{-72 \times 5} \over 9}\)

\(C° = {-360 \over 9}\)

\(C° = -40\)


3

A dominant trait will be expressed when paired with:

75% Answer Correctly

a recessive trait

a chromosome

a gene

a dominant trait


Solution

The traits represented by genes are inherited independently of each other  (one from the male and one from the female gamete) and a trait can be dominant or recessive.  A dominant trait will be expressed when paired with a recessive trait while two copies of a recessive trait (one from each parent) must be present for the recessive trait to be expressed.


4

Which of the following is not a characteristic of the Sun?

52% Answer Correctly

makes up over 99% of the mass of the solar system

formed 2.6 billion years ago

is a yellow dwarf star

is composed of hydrogen and helium


Solution

The Sun is a G-type main-sequence star (G2V) but is informally known as a yellow dwarf star. Composed of 73% hydrogen and 25% helium, the hot plasma that makes up the Sun reaches 9,900°F (5,505°C) at the surface. It formed approximately 4.6 billion years ago and makes up 99.86% of the mass in the solar system.


5

Atoms of an element whose atoms can vary in the number of neutrons in their nucleus are called which of the following?

64% Answer Correctly

reactants

isotopes

ions

products


Solution

The atomic mass of an element listed in the Periodic Table represents the average mass of a single atom of that element and is measured in atomic mass units (amu). This number is an average as some elements have isotopes with atoms that vary in their number of neturons and, therefore, differ in weight.