# Earth Science Multiple Choice Test

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Earth science gives us a new way to learn more about the universe we exist in. Having gathered a lot of knowledge in your past classes, you are seen as capable of answering the quiz below. Give it a try and polish up the ones you do not get right.

• 1.

### 32,000 is written in scientific notation as:

• A.

A. 3.2x10^4

• B.

B. 32x10^4

• C.

C. 32x10^3

• D.

D. 3.2x10^3

A. A. 3.2x10^4
Explanation
The number 32,000 can be written in scientific notation as 3.2x10^4. In scientific notation, a number is expressed as a product of a decimal number between 1 and 10 and a power of 10. In this case, 3.2 is the decimal number between 1 and 10, and 10^4 represents the power of 10. This notation makes it easier to represent and work with very large or very small numbers.

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• 2.

### What type of star system has no defined shape?

• A.

A. Irregular Galaxy

• B.

B. Milky Way

• C.

C. Spiral Galaxy

• D.

D. Binary Star System

A. A. Irregular Galaxy
Explanation
An irregular galaxy is a type of star system that has no defined shape. Unlike spiral or elliptical galaxies, irregular galaxies do not have a distinct structure or symmetry. They are often characterized by their chaotic and disorganized appearance, with no clear pattern or arrangement of stars. Irregular galaxies are typically smaller and less massive than other types of galaxies, and they often contain a high amount of gas and dust.

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• 3.

### A binary star system has more than three stars.

• A.

True

• B.

False

B. False
Explanation
The statement "A binary star system has more than three stars" is false. A binary star system consists of two stars that orbit around a common center of mass. It does not have more than three stars.

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• 4.

### What is an eclipsing binary?

• A.

A. Another name for a binary star system

• B.

B. A binary star system in which one star periodically blocks the other's light

• C.

C. When the moon eclipses the sun

• D.

D. When the sun eclipses the moon

B. B. A binary star system in which one star periodically blocks the other's light
Explanation
An eclipsing binary is a binary star system in which one star periodically blocks the other's light. This phenomenon occurs when the stars are aligned in such a way that one star passes in front of the other from our perspective on Earth, causing a temporary decrease in brightness. This periodic blocking of light allows astronomers to study the system's properties, such as the sizes and masses of the stars, as well as their orbits and rotation rates.

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• 5.

### What is inertia?

• A.

A. The tendency of an object to resist change in motion

• B.

B. How fast an object is going divided by the distance

• C.

C. Mass of an object divided by its volume

• D.

D. A type of gas for which the inert gases were named

A. A. The tendency of an object to resist change in motion
Explanation
Inertia refers to the tendency of an object to resist any change in its state of motion. This means that an object at rest will stay at rest, and an object in motion will continue moving at a constant velocity, unless acted upon by an external force. Inertia is directly related to an object's mass, with larger objects having more inertia. Therefore, option A correctly defines inertia as the tendency of an object to resist change in motion.

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• 6.

### What is a neap tide?

• A.

A. A tide that occurs when the difference between highest and lowest tides is least

• B.

B. A tide that occurs when the difference between highest and lowest tides is the most

• C.

C. A tide that occurs every 100 years

• D.

D. A tide that occurs whenever there is a full moon two months in a row.

A. A. A tide that occurs when the difference between highest and lowest tides is least
Explanation
A neap tide is a type of tide that occurs when the difference between the highest and lowest tides is the least. This happens when the gravitational forces of the moon and the sun are perpendicular to each other, resulting in a weaker tidal effect. During neap tides, the high tides are lower than usual and the low tides are higher than usual. Neap tides typically occur twice a month, during the first and third quarter phases of the moon.

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• 7.

### What is a spring tide?

• A.

A. A tide that occurs when the difference between highest and lowest tides is the least

• B.

B. A tide that occurs when the difference between highest and lowest tides is the most

• C.

C. A tide that occurs every 100 years

• D.

D. A tide that occurs whenever there is a full moon three months in a row

B. B. A tide that occurs when the difference between highest and lowest tides is the most
Explanation
A spring tide is a tide that occurs when the difference between the highest and lowest tides is the most. This happens when the Earth, Moon, and Sun are all aligned, creating a gravitational pull that causes the ocean waters to rise and fall more dramatically than usual. Spring tides occur about twice a month, during the new moon and full moon phases. During these times, the gravitational forces of the Moon and Sun combine, resulting in higher high tides and lower low tides.

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• 8.

### How are tides created?

• A.

A. Based on the moon's position

• B.

B. Based on the Earth's axis

• C.

C. Based on the Earth's tilt

• D.

D. Based on the height of the usn in the sky

A. A. Based on the moon's position
Explanation
Tides are created based on the moon's position. The gravitational pull of the moon and the sun on the Earth's oceans causes the water to bulge, creating high and low tides. When the moon is directly overhead or on the opposite side of the Earth, it creates a high tide. When the moon is at a right angle to the Earth, it creates a low tide. The moon's position determines the strength and timing of the tides, making option A the correct answer.

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• 9.

### What does AU stand for in Spacial Sciences?

• A.

A. Gold

• B.

B. Astronomical Unit

• C.

C. Auhsfart

• D.

D. Atoms United

B. B. Astronomical Unit
Explanation
AU stands for Astronomical Unit in Spatial Sciences. An Astronomical Unit is a unit of measurement used in astronomy to represent the average distance between the Earth and the Sun, which is approximately 93 million miles or 150 million kilometers. This unit is commonly used to measure distances within our solar system.

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• 10.

### What is a light year?

• A.

A. How many earth years it takes light to reach the sun.

• B.

B. The distance that light travels in one year

• C.

C. A small part of a year

• D.

D. The distance that light travels while on its journey to reach the moon

B. B. The distance that light travels in one year
Explanation
A light year is a unit of measurement used in astronomy to represent the distance that light travels in one year. It is a way to describe vast distances in space, as light can travel at a speed of approximately 186,282 miles per second. Therefore, a light year is a significant distance, equal to about 5.88 trillion miles.

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• 11.

• A.

True

• B.

False

B. False
• 12.

### The four terrestrial planets are: Mercury, Venus, Earth, and Mars.

• A.

True

• B.

False

A. True
Explanation
The statement is true because the four terrestrial planets in our solar system are indeed Mercury, Venus, Earth, and Mars. Terrestrial planets are rocky, solid planets that are similar in composition to Earth, as opposed to gas giants like Jupiter and Saturn. These four planets are located closest to the Sun and have solid surfaces, making them different from the gas giants and ice giants in our solar system.

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• 13.

### There are 9 planets.

• A.

True

• B.

False

B. False
Explanation
The statement "There are 9 planets" is not correct. As of now, according to the International Astronomical Union (IAU), there are only 8 planets in our solar system. In 2006, Pluto was reclassified as a "dwarf planet" by the IAU, which led to the revised count of 8 planets. Therefore, the correct answer is False.

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• 14.

### A space spinoff is

• A.

A. When 2 spaceships spin in space

• B.

B. Something developed for use in space that has uses on Earth

• C.

C. Something developed for use on Earth that has uses in space

• D.

D. When a spacecraft crashes before entering orbit

B. B. Something developed for use in space that has uses on Earth
Explanation
A space spinoff refers to something that was initially developed for use in space but also has practical applications or uses on Earth. This means that the technology or product created for space exploration has been adapted or repurposed for use in various industries or everyday life on Earth. It highlights the idea that advancements made in space technology often have a wider impact and can benefit society in multiple ways beyond space exploration.

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• 15.

### A space probe can hold a manned space crew.

• A.

True

• B.

False

B. False
Explanation
A space probe is an unmanned spacecraft that is designed to explore space and gather scientific data. It does not have the capacity to hold a manned space crew as it is not equipped with life support systems or living quarters for astronauts. Therefore, the statement is false.

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• 16.

### A space ship can hold a manned crew.

• A.

True

• B.

False

A. True
Explanation
A space ship is designed to carry astronauts or a manned crew into space. It is equipped with life support systems, communication systems, and other necessary facilities to ensure the safety and well-being of the crew during their journey. Therefore, it is true that a space ship can hold a manned crew.

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• 17.

### What is a rocket?

• A.

A. A missile

• B.

B. A toy

• C.

C. Something that exerts gas in one direction to move the other direction

• D.

D. Something that exerts gas in the direction that it is trying to move in

C. C. Something that exerts gas in one direction to move the other direction
Explanation
A rocket is something that exerts gas in one direction to move in the opposite direction. This is known as Newton's third law of motion, which states that for every action, there is an equal and opposite reaction. In the case of a rocket, the action is the expulsion of gas in one direction, and the reaction is the movement of the rocket in the opposite direction. Rockets use this principle to generate thrust and propel themselves through space.

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• 18.

### The moon is Earth's natural satellite.

• A.

True

• B.

False

A. True
Explanation
The statement is true because the moon is indeed Earth's natural satellite. It orbits around the Earth and is the fifth-largest satellite in the solar system. The moon plays a significant role in various natural phenomena on Earth, such as tides. It also has a substantial impact on the planet's climate and the behavior of some animals.

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• 19.

### A planet can have more than one moon.

• A.

True

• B.

False

A. True
Explanation
This statement is true because there are several planets in our solar system, such as Jupiter and Saturn, that have multiple moons. For example, Jupiter has 79 known moons, while Saturn has 82 known moons. Therefore, it is possible for a planet to have more than one moon.

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• 20.

### What is a satellite?

• A.

A. Something that brings us cable

• B.

B. A device put in space to orbit another object

• C.

C. Something that can only be controlled by someone in space

• D.

D. A device that only works on Saturdays

B. B. A device put in space to orbit another object
Explanation
A satellite is a device that is placed in space and orbits around another object, such as a planet or a moon. Satellites are used for various purposes, including communication, weather monitoring, navigation, and scientific research. They are not limited to being controlled only by someone in space and do not exclusively work on Saturdays.

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