1.
Which scientific term is best defined as an electrically charged atom?
Correct Answer
B. Ion
Explanation
An ion is an electrically charged atom that has gained or lost electrons. This process creates an imbalance between the number of protons and electrons, resulting in a positive or negative charge. Unlike a neutral atom, ions can easily participate in chemical reactions and are often involved in the conduction of electricity. Therefore, the term "ion" is the best definition for an electrically charged atom.
2.
What is a space which is entirely devoid of matter called in science terms?
Correct Answer
D. Vacuum
Explanation
A space which is entirely devoid of matter is called a vacuum in science terms. A vacuum is an area where there is no air or any other substance present. It is completely empty and lacks any particles or molecules. Vacuums are commonly created in laboratories to study the behavior of matter and to conduct experiments in a controlled environment. In outer space, the vast majority of space is a vacuum, with very low density and absence of matter.
3.
What is the distance between two peaks of a wave called?
Correct Answer
B. Wavelength
Explanation
The distance between two peaks of a wave is called wavelength. Wavelength is a fundamental property of a wave and is measured as the distance between two corresponding points on adjacent waves, such as from one crest to the next crest or from one trough to the next trough. It is commonly represented by the Greek letter lambda (λ) and is used to describe various types of waves, including electromagnetic waves, sound waves, and water waves. Wavelength plays a crucial role in determining the characteristics and behavior of waves.
4.
What is the rate at which something moves called?
Correct Answer
C. Speed
Explanation
The rate at which something moves is called speed. Speed refers to the distance traveled by an object in a given amount of time. It is a measure of how fast or slow something is moving. Orbit, momentum, and mileage are not directly related to the rate of movement, making speed the correct answer.
5.
A unit of electromotive force is called what?
Correct Answer
D. Volt
Explanation
The unit of electromotive force is called a volt. It is a measure of the electric potential difference between two points in a circuit. The volt is named after the Italian physicist Alessandro Volta, who invented the first battery.
6.
What unit of measurement is one-thousandth of a gram?
Correct Answer
C. Milligram
Explanation
A milligram is the correct answer because it is a unit of measurement that is one-thousandth of a gram. It is commonly used to measure small amounts of substances, particularly in the field of medicine and chemistry.
7.
What is water in its solid form called?
Correct Answer
B. Ice
Explanation
Water in its solid form is called ice.
8.
A unit for measuring pressure is also known as what?
Correct Answer
C. Pounds Per Square Inch (Psi)
Explanation
The correct answer is "Pounds Per Square Inch (Psi)". A unit for measuring pressure is commonly referred to as Psi. Psi is a unit of pressure that represents the force exerted on an area of one square inch. It is commonly used in various fields such as engineering, physics, and fluid mechanics to measure and describe pressure levels.
9.
What is the irregular and instantaneous motion of air called?
Correct Answer
B. Turbulence
Explanation
Turbulence refers to the irregular and instantaneous motion of air. It is characterized by unpredictable changes in wind speed and direction, causing a bumpy or rough ride for aircraft and other objects in the air. Turbulence can be caused by various factors such as atmospheric pressure changes, temperature variations, and wind shear. It is a common phenomenon during flights and can be uncomfortable for passengers, but it is generally not dangerous as modern aircraft are designed to withstand it.
10.
What does splitting a laser light into two beams through a silver mirror make?
Correct Answer
D. Hologram
Explanation
Splitting a laser light into two beams through a silver mirror creates a hologram. A hologram is a three-dimensional image that is created by using interference patterns of light. By splitting the laser light, the silver mirror allows for the creation of multiple beams that can be used to create a holographic image.
11.
Which term describes flying at six times the speed of sound?
Correct Answer
C. Mach 6
Explanation
The term that describes flying at six times the speed of sound is Mach 6. The Mach number is a unit used to measure the speed of an object in relation to the speed of sound. Mach 6 means that the object is traveling at a speed six times faster than the speed of sound.
12.
What is another name for a volt-ohm meter?
Correct Answer
D. VOM
Explanation
A volt-ohm meter is commonly referred to as a VOM. This device is used to measure voltage, current, and resistance in electrical circuits. The term VOM is an abbreviation for volt-ohm meter and is widely used in the field of electronics. The other options, such as Laser Counter, Scope, and Wire Tracer, do not accurately describe a volt-ohm meter and are therefore incorrect.
13.
Which abbreviation refers to a term that literally means "below red"?
Correct Answer
A. IR
Explanation
The abbreviation "IR" refers to the term "infra-red," which literally means "below red." Infra-red refers to the portion of the electromagnetic spectrum with wavelengths longer than those of visible light, and it is commonly used in various technologies such as remote controls, night vision, and heat detection.
14.
The four engines of a Boeing 747 jet produce 188,000 pounds (85,275 kilograms) of what?
Correct Answer
B. Thrust
Explanation
The correct answer is "Thrust." In the context of a Boeing 747 jet, thrust refers to the force produced by the engines that propels the aircraft forward. It is the force that counteracts drag and allows the plane to move through the air. The four engines of a Boeing 747 jet collectively produce a significant amount of thrust, enabling the aircraft to achieve and maintain flight.
15.
Which of these is a property of a marble?
Correct Answer
A. It Will Sink In A Glass Of Water
Explanation
Marble is a dense material, which means it has a high mass per unit volume. This property allows it to sink in water because the buoyant force exerted on the marble is less than its weight. Therefore, the correct answer is "It Will Sink In A Glass Of Water."