ASVAB General science1

In taxonomy, which classification comes after 'family'?

Genus Order is Kingdom, phylum, class, order, family, genus, species, with the higher classifications encompassing more organisms.

The number of an atom is composed of:?

Protons and neutrons The nucleus of an atom is composed of protons and neutron.

The sun's energy reaches the Earth's surface primarily in the form of:

Visible light radiation ultraviolet radiation

Which of the following is an organic compound?

glucose (C6H12O6) All organic compounds contain carbon (C). Potassium (K) is only a single element, and it does not contain carbon.

What does an anemometer measure?

wind speed A anemometer is a device for measuring wind speed. Humidity is measured by a hygrometer. Atmospheric or air pressure is measured by an barometer. Temperature is measured by a thermometer.

Craig ran 2.5 miles on his afternoon run . How many feet did he run?

13200 feet There are 5,280 feet in a mile meaning that 2.5 miles is 13,200 feet

Approximately how many bones exist in the human boy?

200 There are 206 bones in the body.

Heparin is an anticoagulants. What is the primary purpose of drugs like Heparin?

to prevent the blood from clotting An anticoagulant is a substance that stops blood from clotting.

One of the reasons bacteria can be so deadly is because they multiply very quickly. E. coli has a doubling time of around 15 minutes. This means that if 100 bacteria are left alone for 2 hours, they will multiply to become: ?

25,600 Bacteria A doubling time of 15 minutes means that the bacteria double in number every 15 minutes. In two hours, that is 8 doubling periods. We can thus calculate the number of bacteria by 1008 = 25,600.

The Earth is about 4.5 billion years old. About many years ago did life first appear?

3.5 billion years First life forms were single cell organism RNA molecules that could self replicate.

In meiosis, one parent cell becomes how many daughter cells?

4

A calorie is actually a measure of energy, and is equivalent to how many Joules?

4.18

Water has heat capacity of 4.2 J/g*C. This means that heat up 100 mL of water 1 degree Celsius, we need:?

420 Joules

What is the molecular weight of the compound C2H5O ?

45 Add masses of each individual element

When a human cell divides in mitosis, the two daughter cells will each have:?

46 chromosomes human genome has 23 pair of chromosome meaning each cell has a total of 46 chromosomes.

If bowling ball is pushed with 20 Newtons of force and has a mass of 5kg, what is its initial acceleration?

5 m/s^2 Acceleration from force equation F = ma. A = force/mass 20N/4kg = 5 m/s^ acceleration

ON the pH scale, any substance below what number is considered acid?

7 The pH scale ranges from 0 to 14, with 0 being acidic and 14 being alkaline (or basic). A pH of 7 is considered neutral. Anything below 7, then, is acidic.

The earth's surface is covered by approximately what percent water?

70% The Earth's surface is primarily covered by water

A train travels at 25 mph for 3 hours. How far did the train move?

75 miles 25 * 3 = 75 miles

IN the lily flower, the red color is dominant and the white color is recessive. This means that if you cross a homozygous red flower with a white one, the offspring will be:?

All red If gene is dominant then all crossing will be red

A nerve impulse is transmitted through your nervous system primarily by:?

An electric potential Nerves impulses are transmitted in the nervous system.

Bile is a substance secreted to help digest fats. Bile is stored in the :?

Gallbladder the gallbladder is a small organ next to the liver that secretes bile.

What is the latitude of any point on earth's equator?

0 All points on the equator have a latitude of 0 degrees. The North Pole has a latitude of 90 degrees North. The South Pole has a latitude of 90 degrees South.

Ten thousand centimeters equals how many kilometers?

0.1 One hundred centimeters equals one meter. 1,000 meters equal one kilometer, so ten thousand centimeters equals one-tenth of a kilometer or 0.1 kilometers.

The potential energy of an object with a mass of 5kg that is placed 20 meters above the surface of the Earth is most nearly:?

981 Joules Ep = mgh. Ep = 5kg * 9.81m/s2 * 20cm = 981 m= mass g= gravitational accele. h= height

DNA has which of the following structures?

A double helix The Watson-Crick model of DNA is a double-stranded twisted ladder, or double helix.

Diffraction

A wave interference by a medium which causes scattering of the light.

Muscles in the human body require what energy compound to function?

ATP

Muscle in the human body require what energy compound to function?

ATP Mostly glucose (sugar)

Plants are autotrophs, meaning that they?

Are able to produce their own food.

A solution contains 0.1 molar hydrogen ions (H+). This means the solution is likely:?

Around pH 1.0

Plant and animal cells both have cell membrane and nuclear membrane. However, plant cells have a structure that animal cells do not, known as a:?

Cell wall

Two separate weather fronts will have air that is of different:?

Density

Which of the following time periods is the longest?

Eon

Which element in the protein hemoglobin, found in red blood cells, is responsible for binding oxygen?

Iron iron is responsible for Carrying oxygen from the air in the lungs and releasing it through the body.

One of the primary characteristic of a bacteria is its:?

Lack of nuclear membrane All bacteria are prokaryotes

Which of the following is a characteristic of the tundra ecological biome?

Landscape dominated by shrubs and short trees.

The cell membrane is a structure composed primarily of:?

Lipid The cell membrane is a lipid bilayer.

Which of the following body system is most closely associated with the immune system?

Lymphatic system Lymphatic system is responsible for recycling dead cells, including dead bacteria and other infectious organisms.

All of the following are phenotypic traits except for:?

Missing 22nd chromosome phenotypic are expressed physically.

Which of the following symbols represents one of the elements present in NaCI?

Na The elements that make up NaCl are sodium (Na) and chlorine (Cl). Choice a is the symbol for carbon, which is not present at all. Choice d is the symbol for nitrogen. Choice c is a compound including more than one element.

If CaCI2 is mixed with Na2SO4 in aqueous solution, which of the following is a possible product?

NaCI

If an unbalanced force acts on an object, then the object will begin to accelerate according to?

Newton's second law Newton's second law states that if if an unbalanced force acts on an object, ti will begin to move according to Force = mass x acceleration

Which of the following planets has a perfectly circular orbit?

None of the above None of the planets have perfectly circular orbits. A. Earth B. Mars C. Jupiter

What is the second most abundant gas in the atmosphere?

Oxygen Oxygen represents 21% of the Earth atmosphere nitrogen is about 78%.

Carbon dioxide can be consumed and converted into glucose by what type of organism?

Plants Plants are capable of photosynthesis and use light from sun to consume carbon dioxide and water to form glucose.

When a blood vessel is injured, which of the following is responsible for clotting?

Platelets Platelets are small proteins in the bloodstream that reacts when the body signals an injury.

As light passes through a substance, the incident angle changes, meaning the light's entering angle is different than its exiting angle. This is an example of:?

Refraction Refraction is the change in direction of light or wave as it passes through a material.

Blood that flows back from the body will enter the heart through the:

Right Atrium

Which type of rock would likely be found at the bottom of a river bed:

Sedimentary Sedimentary rock is formed from 'sediment,' which is a mixture of sand, shell, and other small pieces of material commonly located at the bottom of a river or lake.

All agents have two poles which can be used to predict the direction of their magnetic waves. these two poles are the:?

South and North Magnets have a North Pole and a South Pole..

If one tectonic plate slides under another, the process is known as:?

Subduction The process of which plates slide under another

Organisms which help on another survive by providing a mutual benefit to each other are known as:?

Symbionts provide mutual benefits to one another

Which of the following statements about the Earth is true?

The mantle makes up the largest percentage of the earth volume The mantle is the largest segment of the Earth's structure.

Sound waves will travel the fastest in a medium that is:?

The most dense The speed of sound is directly proportional to the density of the material through which it travels.

In an electromagnetic wave, as the frequency of the wave becomes greater, what becomes shorter?

The wavelength

Which of the following is true of chemical elements?

They are pure substances consisting of one type of atom. Chemical elements are substances containing only atoms of a single type.

Of the following layers of the atmosphere, which is the closest to the earth's surface and contains the majority of clouds?

Troposphere

Which of the following plants lacks a vascular system?

liverworts Liverworts are bryophytes, which are characterized by their lack of a vascular system.