# Rocketry & Space Travel Chapter 3 Science Quiz For 2nd Grade

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2nd Quarter Test for Science 7. Chapter 3 - Rocketry & Space Travel

• 1.

### Newton's Third Law states, "For every action, there is a/an ___________ and _____________ reaction."

• A.

Unequal / indistinct

• B.

Equal / distinct

• C.

Unequal / opposite

• D.

Equal / opposite

D. Equal / opposite
Explanation
Newton's Third Law states that for every action, there is an equal and opposite reaction. This means that whenever an object exerts a force on another object, the second object exerts a force of equal magnitude but in the opposite direction on the first object. This law highlights the principle of conservation of momentum, stating that the total momentum of a system remains constant unless acted upon by external forces.

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• 2.

### True or False.  The aperture is the opening of the telescope which lets in light.

• A.

True

• B.

False

A. True
Explanation
The aperture of a telescope refers to the opening through which light enters the instrument. It is an essential component as it determines the amount of light that can be collected by the telescope. A larger aperture allows more light to enter, resulting in a brighter and clearer image. Therefore, it is correct to say that the aperture is the opening of the telescope that lets in light.

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• 3.

### Newton's First Law: an object at rest tends to ______________________________.

• A.

React more rapidly to gravitational pull than an object in motion

• B.

Have an opposite and equal reaction

• C.

Drift slowly at first, then more quickly when an outside force is applied

• D.

Stay at rest until acted upon by an outside force

D. Stay at rest until acted upon by an outside force
Explanation
Newton's First Law states that an object at rest will remain at rest until an external force is applied to it. This means that if there are no external forces acting on an object, it will continue to stay at rest. Once an external force is applied, the object will begin to move. Therefore, the correct answer is "stay at rest until acted upon by an outside force."

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• 4.

### F = m a means

• A.

Force = mass x appreciation

• B.

Force = mass x acceleration

• C.

Flux = mass x acceleration

• D.

Flux = mass x appreciation

B. Force = mass x acceleration
Explanation
The correct answer is "Force = mass x acceleration" because according to Newton's second law of motion, the force acting on an object is directly proportional to its mass and the acceleration produced. This equation is commonly used to calculate the force exerted on an object when its mass and acceleration are known.

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• 5.

### F = m ais used to calculate the ___________ of an object.

• A.

Flux

• B.

Fracture

• C.

Force

• D.

Frequency

• E.

First Law of Newton

C. Force
Explanation
The equation F = ma represents Newton's second law of motion, which states that the force acting on an object is equal to the mass of the object multiplied by its acceleration. Therefore, the correct answer is "force" because the equation is used to calculate the force exerted on an object.

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• 6.

### A/An __________ orbit is _________ and the satellite does not remain the same distance away from the planet.

• A.

Elliptical / not even

• B.

Elliptical / even

• C.

Circular / not even

• D.

Circular / even

A. Elliptical / not even
Explanation
An elliptical orbit is not even and the satellite does not remain the same distance away from the planet. This means that the satellite's distance from the planet varies throughout its orbit, resulting in an uneven and non-constant path.

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• 7.

### A/An __________ orbit is _________ and the satellite remains the same distance away from the planet.

• A.

Elliptical / not even

• B.

Elliptical / even

• C.

Circular / not even

• D.

Circular / even

D. Circular / even
Explanation
A circular orbit is even and the satellite remains the same distance away from the planet. In a circular orbit, the satellite follows a path that is perfectly round, with the planet at the center. This means that the distance between the satellite and the planet remains constant throughout the orbit. Additionally, the speed of the satellite remains constant, resulting in an even orbit.

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• 8.

### In a/an _________________ orbit the closest point of the orbit is the ___________ and the point furthest is called the ______________.

• A.

Circular / perigee / apogee

• B.

Elliptical / perigee / apogee

• C.

Circular / apogee / perigee

• D.

Elliptical / apogee / perigee

B. Elliptical / perigee / apogee
Explanation
In an elliptical orbit, the closest point of the orbit is called the perigee and the point furthest is called the apogee. This is because an elliptical orbit is shaped like an ellipse, with one end closer to the central body (perigee) and the other end farther away (apogee).

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• 9.

### The most famous space telescope is called the _________________ Space Telescope

• A.

Hemble

• B.

Himble

• C.

Humble

• D.

Hamble

• E.

None of the above

E. None of the above
Explanation
It is called the Hubble Space Telescope.

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• 10.

### The __________ landers, which were sent to __________ , used __________ to collect __________ rock and soil.

• A.

Lunar / Moon / robotic arms / Lunar

• B.

Combustion / Moon / highly trained astronauts / Lunar

• C.

Viking / Mars / robotic arms / Martian

• D.

Voyager / Mars / highly trained astronauts / Martian

C. Viking / Mars / robotic arms / Martian
Explanation
The correct answer is Viking / Mars / robotic arms / Martian. The Viking landers were sent to Mars and used robotic arms to collect Martian rock and soil.

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• 11.

### All fires need these three things.

• A.

Fuel, heat and exhaust

• B.

Oxygen, heat and gravity

• C.

Exhaust, oxygen and fuel

• D.

Fuel, heat and oxygen

• E.

Oxygen, fuel and gravity

D. Fuel, heat and oxygen
Explanation
All fires require three essential components: fuel, heat, and oxygen. Fuel provides the material that will burn, heat is necessary to initiate and sustain the combustion process, and oxygen acts as the oxidizing agent that supports the chemical reaction. Without any of these three elements, a fire cannot occur.

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• 12.

### A/An ___________________ telescope uses a large mirror.

• A.

Reflecting

• B.

Refracting

• C.

Magnifying

• D.

Aperature

A. Reflecting
Explanation
A reflecting telescope uses a large mirror to gather and focus light. The mirror reflects the incoming light and directs it towards the eyepiece, allowing for observation and magnification of distant objects. This type of telescope is commonly used in astronomy and provides a clearer and sharper image compared to a refracting telescope, which uses lenses instead of mirrors.

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• 13.

### A/An ___________________ telescope uses only lenses to produce images.

• A.

Reflecting

• B.

Refracting

• C.

Magnifying

• D.

Aperature

B. Refracting
Explanation
A refracting telescope uses only lenses to produce images. Unlike reflecting telescopes that use mirrors, a refracting telescope relies on the bending or refraction of light as it passes through the lenses to form an image. The lenses in a refracting telescope work together to gather and focus incoming light, allowing us to see objects in the sky with greater clarity. This type of telescope is commonly used by astronomers and amateur stargazers to observe celestial bodies.

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• 14.

### The Hubble Space Telescope is an example of a _________________ telescope.

• A.

Reflecting

• B.

Refracting

• C.

Magnifying

• D.

Aperature

A. Reflecting
Explanation
The Hubble Space Telescope is an example of a reflecting telescope because it uses mirrors to gather and focus light. Reflecting telescopes are designed with a curved mirror that reflects and concentrates incoming light, allowing for clearer and more detailed observations of celestial objects. This design also eliminates the chromatic aberration that can occur in refracting telescopes, making reflecting telescopes a preferred choice for space exploration. The Hubble Space Telescope, with its large mirror and advanced technology, has provided invaluable insights into the universe since its launch in 1990.

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• 15.

### _____________________ are unmanned space vehicles sent out to gather information about planets.

• A.

Refracting lenses

• B.

Satellite perigees

• C.

Robotic landers

• D.

Space probes

D. Space probes
Explanation
Space probes are unmanned space vehicles that are sent out to gather information about planets. They are equipped with various instruments and sensors to collect data such as images, atmospheric composition, temperature, and magnetic fields. These probes are designed to withstand the harsh conditions of space and the specific environment of the planet they are exploring. They can be sent to orbit a planet, fly by it, or even land on its surface to provide valuable scientific insights and expand our knowledge of the solar system.

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• 16.

### In order for a rocket to get as high off Earth as it can it must fight ___________.

• A.

Oxygen

• B.

Gravity

• C.

Atmospheric pressure

• D.

Thrust

B. Gravity
Explanation
In order for a rocket to reach its maximum height off Earth, it must overcome the force of gravity. Gravity is the force that pulls objects towards the center of the Earth, and it is what keeps the rocket grounded. To overcome gravity, the rocket's engines generate enough thrust to propel it upwards, allowing it to fight against the pull of gravity and reach higher altitudes. Oxygen and atmospheric pressure are not directly related to the rocket's ability to reach maximum height, although they may play a role in the rocket's propulsion system.

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• 17.

### The ________________________ is the only equipment lost on each mission of the U.S. Space Shuttle.

• A.

Solid rocket booster

• B.

Cargo

• C.

External fuel tank

• D.

Internal fuel tank

• E.

None of the above

C. External fuel tank
Explanation
The external fuel tank is the only equipment lost on each mission of the U.S. Space Shuttle. This is because the solid rocket boosters are recovered and reused, while the cargo and internal fuel tank are not lost during the mission.

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• 18.

### The U.S. Space Shuttle is a significant development in space exploration because it is ______________.

• A.

Inexpensive

• B.

Extremely expensive

• C.

Reusable

• D.

Not reusable

C. Reusable
Explanation
The U.S. Space Shuttle is a significant development in space exploration because it is reusable. This means that after each mission, the shuttle can be refurbished and used again for future missions, reducing the cost and resources required for each launch. The ability to reuse the shuttle allows for more frequent and cost-effective space exploration, making it a significant advancement in the field.

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• 19.

### The Voyager 2 space probe visited which four planets.

• A.

Mercury, Venus, Mars and Jupiter

• B.

Mars, Jupiter, Neptune and Pluto

• C.

Jupiter, Saturn, Uranus and Neptune

• D.

Uranus, Mercury, Venus and Saturn

C. Jupiter, Saturn, Uranus and Neptune
Explanation
The Voyager 2 space probe visited Jupiter, Saturn, Uranus, and Neptune. This is evident from the given answer choice, which correctly lists these four planets. The other answer choices do not include all four of these planets, making them incorrect.

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• 20.

### True or False. The Galileo probe gathered much information about Jupiter and its moons before returning to earth.

• A.

True

• B.

False

B. False
Explanation
The Galileo probe was descroyed by the intense pressure of Jupiter's atmosphere after 70 minutes.

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• 21.

### True or False.  Some space probes have left our Solar System.

• A.

True

• B.

False

A. True
Explanation
Some space probes, such as Voyager 1 and Voyager 2, have indeed left our Solar System. These probes were launched by NASA in 1977 and have been traveling through space ever since. In 2012, Voyager 1 became the first human-made object to enter interstellar space, which is beyond the influence of our Sun. Voyager 2 followed suit in 2018. These probes continue to send back valuable data about the space beyond our Solar System.

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• 22.

### The first person in space was ____________________.

• A.

Neil Armstrong, an American astronaut

• B.

Yuri Gagarin, a Soviet cosmonaut

• C.

Buzz Aldrin, an American astronaut

• D.

Johannes Kepler, a German astronaut

B. Yuri Gagarin, a Soviet cosmonaut
Explanation
Yuri Gagarin is the correct answer because he was the first person to travel into space. On April 12, 1961, Gagarin piloted the Vostok 1 spacecraft, completing one orbit around the Earth. This historic achievement made him a pioneer in human space exploration and a symbol of the Soviet Union's space program's success. Neil Armstrong and Buzz Aldrin were both American astronauts, but they were the first two people to walk on the moon during the Apollo 11 mission in 1969. Johannes Kepler was a German astronomer and mathematician, not an astronaut.

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• 23.

### The first person to walk on the moon was ____________________.

• A.

Neil Armstrong, an American astronaut

• B.

Yuri Gagarin, a Soviet cosmonaut

• C.

Buzz Aldrin, an American astronaut

• D.

Johannes Kepler, a German astronaut

A. Neil Armstrong, an American astronaut
Explanation
Neil Armstrong was the first person to walk on the moon. He achieved this historic feat on July 20, 1969, as part of the Apollo 11 mission. Armstrong, an American astronaut, took the famous first step onto the lunar surface and uttered the iconic words, "That's one small step for man, one giant leap for mankind." His accomplishment marked a significant milestone in human space exploration and solidified his place in history as a pioneer in space travel.

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• 24.

### The force of an object is equal to its mass times its acceleration is ____________________.

• A.

Newton's First Law

• B.

Newton's Second Law

• C.

Newton's Third Law

• D.

Newton's Fourth Law

• E.

Newton's Fifth Law

B. Newton's Second Law
Explanation
Newton's Second Law states that the force acting on an object is directly proportional to the mass of the object and the acceleration it experiences. This law is mathematically represented by the equation F = ma, where F is the force, m is the mass, and a is the acceleration. Therefore, the correct answer is Newton's Second Law.

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• 25.

### __________________ confirmed the findings of Copernicus, that the Earth orbits the sun.

• A.

Gagarin

• B.

Newton

• C.

Kepler

• D.

Galileo

D. Galileo
Explanation
Galileo confirmed the findings of Copernicus, that the Earth orbits the sun. He made significant contributions to the field of astronomy and is known for his observations using the telescope. Galileo's observations of the phases of Venus and the moons of Jupiter provided strong evidence for the heliocentric model proposed by Copernicus. His work challenged the prevailing geocentric view of the universe and supported the idea that the Earth is not the center of the solar system.

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• 26.

### True or False.  The U.S. Space Shuttle has a remote-controlled robotic arm that is used to launch, retrieve, and repair satellites in space.

• A.

True

• B.

False

A. True
Explanation
The U.S. Space Shuttle does indeed have a remote-controlled robotic arm that is used for various tasks in space. This arm is known as the Canadarm and it was used to deploy, retrieve, and repair satellites during the Space Shuttle missions. The Canadarm played a crucial role in the assembly and maintenance of the International Space Station as well. Therefore, the statement is true.

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• 27.

### True or False. The fuel for a rocket may be either liquid or solid.

• A.

True

• B.

False

A. True
Explanation
The fuel for a rocket may be either liquid or solid because different types of rockets use different propellants. Liquid rockets use liquid propellants, such as liquid hydrogen and liquid oxygen, which are stored in separate tanks and mixed together during combustion. Solid rockets, on the other hand, use a solid propellant, which is a mixture of fuel and oxidizer that is already combined and packed into a solid form. Both types of rockets have been successfully used in space exploration and have their own advantages and disadvantages.

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• 28.

### LOX = _________________

• A.

Law of exhaustion

• B.

Liquid oil exhaust

• C.

Law of oxidation

• D.

Liquid oxygen

• E.

Law of xrays

D. Liquid oxygen
Explanation
LOX stands for liquid oxygen. Liquid oxygen is a form of oxygen that is in a liquid state at extremely low temperatures. It is commonly used in rocket propulsion systems and in the medical field for respiratory therapy. The other options listed in the question, such as "law of exhaustion," "liquid oil exhaust," "law of oxidation," and "law of X-rays," are not relevant to the abbreviation LOX and do not accurately describe what LOX represents.

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• 29.

### True or False.  A liquid-fueled rocket has one tank.

• A.

True

• B.

False

B. False
Explanation
A liquid-fueled rocket has two tanks; one for liquid fuel and one for liquid oxygen.

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• 30.

### A ________________________ is where combustion occurs.

• A.

Solid-fueled rocket

• B.

Combustion chamber

• C.

Liquid-fueled rocket

• D.

Body tube

• E.

Fuel tank

B. Combustion chamber
Explanation
A combustion chamber is a space or chamber where combustion takes place. It is designed to contain and control the process of burning fuel, whether it is solid or liquid. This is where the fuel is ignited and reacts with oxygen to produce hot gases and release energy. The combustion chamber is an essential component of rockets as it provides the necessary environment for the combustion process to occur efficiently and safely.

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• 31.

### The Earth has a/an ______________ orbit around the __________.

• A.

Elliptical / moon

• B.

Circular / moon

• C.

Elliptical / sun

• D.

Circular / sun

C. Elliptical / sun
Explanation
The Earth has an elliptical orbit around the sun. This means that the shape of Earth's orbit is not a perfect circle, but rather an elongated oval shape. The sun is located at one of the foci of this elliptical orbit. As the Earth moves along its orbit, it is closer to the sun at some points (perihelion) and farther away at others (aphelion). This elliptical orbit is responsible for the changing seasons on Earth, as the distance from the sun affects the amount of sunlight received by different parts of the planet.

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