An orbit is the curved path of a celestial object or spacecraft around a star, planet, or moon.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)Orbit
💡 Explicación
'Orbit' is the specific scientific term for the elliptical path of an object around a larger body in space.
Ver respuesta
Respuesta correcta: B)Orbit
A)TunnelIncorrect. A tunnel is through something.
B)OrbitCorrect. The path followed by an object in space.
C)LandingIncorrect. Arriving on a surface.
D)ExplosionIncorrect. Sudden release of energy.
💡 Explicación
'Orbit' is the specific scientific term for the elliptical path of an object around a larger body in space.
Pregunta 2
Pregunta 2 · D4Bloom: Understand
Describing a past space mission.
The moon landing in 1969 was watched by millions of people around the world.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)was watched
💡 Explicación
The past simple passive 'was watched' describes how the audience experienced a specific historical event.
Ver respuesta
Respuesta correcta: A)was watched
A)was watchedCorrect. Past simple passive for a completed historical event.
B)watchedIncorrect. Active voice.
C)has been watchedIncorrect. Present perfect.
D)is watchedIncorrect. Present tense.
💡 Explicación
The past simple passive 'was watched' describes how the audience experienced a specific historical event.
Pregunta 3
Pregunta 3 · D4Bloom: Apply
Speculating about alien life.
If life existed on other planets, it would change our understanding of the universe.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)existed
💡 Explicación
The second conditional 'if + past simple' is used to talk about an imaginary or unlikely current situation.
Ver respuesta
Respuesta correcta: A)existed
A)existedCorrect. Second conditional for a hypothetical present situation.
B)existsIncorrect. First conditional.
C)had existedIncorrect. Third conditional.
D)would existIncorrect. 'Would' not used in 'if' clause.
💡 Explicación
The second conditional 'if + past simple' is used to talk about an imaginary or unlikely current situation.
Pregunta 4
Pregunta 4 · D4Bloom: Analyze
Article about the "Goldilocks Zone".
The "habitable zone" refers to the region around a star where conditions are just right for liquid water to exist on a planet's surface.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)habitable
💡 Explicación
'Habitable' is the standard scientific adjective for regions or planets that could potentially support life.
Ver respuesta
Respuesta correcta: B)habitable
A)frozenIncorrect. Too cold.
B)habitableCorrect. Habitable means suitable or good enough to live in.
C)toxicIncorrect. Unsafe for life.
D)aridIncorrect. Too dry.
💡 Explicación
'Habitable' is the standard scientific adjective for regions or planets that could potentially support life.
Pregunta 5
Pregunta 5 · D6Bloom: Evaluate
Discussion on the cost of space exploration.
Critics argue that the resources spent on space exploration could be better utilized to address pressing issues on Earth.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)pressing
💡 Explicación
'Pressing' describes urgent and serious problems that require immediate action and resources.
Ver respuesta
Respuesta correcta: C)pressing
A)unimportantIncorrect. Issues on Earth are important.
B)trivialIncorrect. Trivial means of little importance.
C)pressingCorrect. Pressing means requiring urgent attention.
D)solvedIncorrect. If they were solved, there would be no debate.
💡 Explicación
'Pressing' describes urgent and serious problems that require immediate action and resources.
Pregunta 6
Pregunta 6 · D6Bloom: Remember
Types of spacecraft.
A probe is an unmanned exploratory spacecraft that transmits information from outer space.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)probe
💡 Explicación
'Probe' is the specific term for an unmanned craft designed for remote scientific observation.
Ver respuesta
Respuesta correcta: B)probe
A)shuttleIncorrect. A shuttle is usually manned and designed for multiple trips.
B)probeCorrect. Standard term for unmanned exploration tools.
C)stationIncorrect. A station is a permanent base.
D)rocketIncorrect. The rocket is the vehicle used to launch the probe.
💡 Explicación
'Probe' is the specific term for an unmanned craft designed for remote scientific observation.
Pregunta 7
Pregunta 7 · D6Bloom: Understand
Describing an ongoing mission.
Data from the James Webb Telescope is being analyzed by astronomers around the globe.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)is being analyzed
💡 Explicación
The present continuous passive describes the current and continuous scientific work being done.
Ver respuesta
Respuesta correcta: C)is being analyzed
A)is analyzing"Is analyzing" is the active voice: it would make the data the thing doing the analyzing. The astronomers are the ones analysing, so the sentence needs the passive.
B)analyzedIncorrect. Past simple.
C)is being analyzedCorrect. Present continuous passive for an ongoing process.
D)have analyzed"Have analyzed" is the active voice and a perfect form; here the analysis is still under way, and the data is what receives the analysis.
💡 Explicación
The present continuous passive describes the current and continuous scientific work being done.
Pregunta 8
Pregunta 8 · D6Bloom: Apply
Text on "astrophysics".
Astrophysics is the branch of astronomy that deals with the physical properties of celestial bodies and the interaction between matter and radiation.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)Astrophysics
💡 Explicación
'Astrophysics' is the correct scientific discipline for studying the physical nature of stars and galaxies.
Ver respuesta
Respuesta correcta: C)Astrophysics
A)GeologyIncorrect. Study of the Earth.
B)BiologyIncorrect. Study of life.
C)AstrophysicsCorrect. Study of the physics of the universe.
D)BotanyIncorrect. Study of plants.
💡 Explicación
'Astrophysics' is the correct scientific discipline for studying the physical nature of stars and galaxies.
Pregunta 9
Pregunta 9 · D6Bloom: Analyze
Talking about a past astronomical discovery.
Scientists had suspected the existence of black holes long before they were able to photograph one.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)had suspected
💡 Explicación
The past perfect 'had suspected' establishes that the suspicion existed before the actual photograph was taken.
Ver respuesta
Respuesta correcta: A)had suspected
A)had suspectedCorrect. Past perfect for an action before another past point.
B)suspectIncorrect. Present tense.
C)have suspectedIncorrect. Present perfect.
D)suspectsIncorrect. Third person singular present.
💡 Explicación
The past perfect 'had suspected' establishes that the suspicion existed before the actual photograph was taken.
Pregunta 10
Pregunta 10 · D6Bloom: Evaluate
Critique of "space debris".
The accumulation of space debris in Earth's orbit poses a serious threat to future space missions and satellite technology.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)threat
💡 Explicación
'Threat' is the appropriate term for the danger posed by the growing amount of junk in space.
Ver respuesta
Respuesta correcta: A)threat
A)threatCorrect. A threat is a person or thing likely to cause damage or danger.
B)benefitIncorrect. Debris is harmful.
C)solutionIncorrect. Debris is the problem.
D)mysteryIncorrect. We know it's there and what it is.
💡 Explicación
'Threat' is the appropriate term for the danger posed by the growing amount of junk in space.
Pregunta 11
Pregunta 11 · D8Bloom: Remember
Definition of an astronaut.
An astronaut is a person who is trained to travel in a spacecraft.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)astronaut
💡 Explicación
'Astronaut' is the professional title for individuals who travel beyond Earth's atmosphere.
Ver respuesta
Respuesta correcta: C)astronaut
A)pilotIncorrect. Pilots fly planes; astronauts travel in space.
B)driverIncorrect. Refers to ground vehicles.
C)astronautCorrect. The specific term for a space traveler.
D)sailorIncorrect. Refers to water vehicles.
💡 Explicación
'Astronaut' is the professional title for individuals who travel beyond Earth's atmosphere.
Pregunta 12
Pregunta 12 · D8Bloom: Understand
Describing a future goal in space.
By the end of this century, a permanent base will have been established on Mars.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)will have been established
💡 Explicación
The future perfect passive indicates that the base will be a finished achievement by the end of the century.
Ver respuesta
Respuesta correcta: C)will have been established
A)will establishIncorrect. Active voice.
B)establishedIncorrect. Past tense.
C)will have been establishedCorrect. Future perfect passive for a completed state in the future.
D)establishingIncorrect. Gerund.
💡 Explicación
The future perfect passive indicates that the base will be a finished achievement by the end of the century.
Pregunta 13
Pregunta 13 · D8Bloom: Apply
Discussing zero gravity.
Microgravity is the condition in which people or objects appear to be weightless.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)Microgravity
💡 Explicación
'Microgravity' is the scientific term for the state of apparent weightlessness experienced in orbit.
Ver respuesta
Respuesta correcta: C)Microgravity
A)PressureIncorrect. Pressure is force.
B)FrictionIncorrect. Resistance between surfaces.
C)MicrogravityCorrect. The specific term for "zero-g" environments.
D)VelocityIncorrect. Speed in a direction.
💡 Explicación
'Microgravity' is the scientific term for the state of apparent weightlessness experienced in orbit.
Pregunta 14
Pregunta 14 · D8Bloom: Analyze
Conditional about the Apollo missions.
If the Apollo 11 mission hadn't been successful, the space race would have taken a different turn.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)hadn't been
💡 Explicación
The third conditional is used to speculate about how historical events might have gone differently.
Ver respuesta
Respuesta correcta: C)hadn't been
A)wasn'tIncorrect. Second conditional.
B)isn'tIncorrect. Present.
C)hadn't beenCorrect. Third conditional for hypothetical past.
D)wouldn't beIncorrect. 'Would' not in 'if' clause.
💡 Explicación
The third conditional is used to speculate about how historical events might have gone differently.
Pregunta 15
Pregunta 15 · D8Bloom: Evaluate
Conclusion of an article on private spaceflight.
The author concludes that private companies are set to play a pivotal role in the future of space exploration.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: C)pivotal
💡 Explicación
'Pivotal' is an excellent adjective for describing a role that is central and critically important.
Ver respuesta
Respuesta correcta: C)pivotal
A)minorIncorrect. Pivotal means the opposite.
B)negativeIncorrect. The author sees them as key developers.
C)pivotalCorrect. Pivotal means of crucial importance in relation to the development of something else.
D)accidentalIncorrect. Their role is intentional and planned.
💡 Explicación
'Pivotal' is an excellent adjective for describing a role that is central and critically important.
Pregunta 16
Pregunta 16 · D8Bloom: Remember
Defining a galaxy.
A galaxy is a system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)galaxy
💡 Explicación
'Galaxy' is the standard term for a massive, gravitationally bound system of stars.
Ver respuesta
Respuesta correcta: A)galaxy
A)galaxyCorrect. Large system of stars.
B)planetIncorrect. Smaller part of a galaxy.
C)cometIncorrect. Small icy body.
D)meteorIncorrect. Small rocky body.
💡 Explicación
'Galaxy' is the standard term for a massive, gravitationally bound system of stars.
Pregunta 17
Pregunta 17 · D10Bloom: Understand
Reporting a discovery.
Astronomers announced that they had found evidence of liquid water on Europa.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: A)had found
💡 Explicación
In reported speech, we backshift the tense of the discovery to show it happened before the announcement.
Ver respuesta
Respuesta correcta: A)had found
A)had foundCorrect. Backshifted from present perfect to past perfect.
B)have foundIncorrect. Backshifted in reported speech.
C)findIncorrect. Present tense.
D)will findIncorrect. Future tense.
💡 Explicación
In reported speech, we backshift the tense of the discovery to show it happened before the announcement.
Pregunta 18
Pregunta 18 · D10Bloom: Apply
Text about "terraforming".
Terraforming is the hypothetical process of deliberately modifying another planet's atmosphere to make it habitable for humans.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)Terraforming
💡 Explicación
'Terraforming' (literally 'Earth-shaping') is the term for making other planets more like Earth.
Ver respuesta
Respuesta correcta: D)Terraforming
A)DestroyingIncorrect. Opposite goal.
B)MappingIncorrect. Just making a map.
C)MiningIncorrect. Extracting resources.
D)TerraformingCorrect. Specific term for planet-shaping.
💡 Explicación
'Terraforming' (literally 'Earth-shaping') is the term for making other planets more like Earth.
Pregunta 19
Pregunta 19 · D10Bloom: Analyze
Describing a long journey.
By the time the spacecraft reaches Pluto, it will have been traveling for over nine years.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: B)will have been traveling
💡 Explicación
The future perfect continuous describes the total length of the journey at the moment of arrival.
Ver respuesta
Respuesta correcta: B)will have been traveling
A)will travelIncorrect. Simple future.
B)will have been travelingCorrect. Future perfect continuous for duration up to a future point.
C)is travelingIncorrect. Present continuous.
D)traveledIncorrect. Past simple.
💡 Explicación
The future perfect continuous describes the total length of the journey at the moment of arrival.
Pregunta 20
Pregunta 20 · D10Bloom: Evaluate
Final thought on the spirit of exploration.
Space exploration embodies the human desire to push the boundaries of knowledge and explore the unknown.
Elige una opción para comprobar tu respuesta.
Respuesta correcta: D)embodies
💡 Explicación
'Embodies' is a sophisticated verb used to show how an activity (exploration) represents a deeper value or desire.
Ver respuesta
Respuesta correcta: D)embodies
A)ignoresIncorrect. Exploration is about paying attention.
B)limitsIncorrect. It expands knowledge.
C)delaysIncorrect. It advances knowledge.
D)embodiesCorrect. To embody means to be an expression of or give a tangible or visible form to an idea or quality.
💡 Explicación
'Embodies' is a sophisticated verb used to show how an activity (exploration) represents a deeper value or desire.
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