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WorksheetsHabitable Planets CTS 8th Grade
Total questions: 25
Worksheet time: 13mins
What is the band of potential habitability?
the right distance from a star for an atmosphere to form
the right distance from a star for a terrestrial planet to form
the right distance and temperature for liquid water
the right distance to protect a planet from the sun's UV rays
Compared to a smaller, cooler star, a giant hot star's habitable zone would be found _________________.
at a much greater distance
at a much smaller distance
at a much higher temperature
at a much lower temperature
Which of the following is not a characteristic of a habitable planet?
Earth-sized
terrestrial planet
Within its stars habitable zone
gas giant
Why are big bright stars less likely to have habitable planets than smaller stars?
they are too long lived
they are short lived and run out of hydrogen fuel quickly
they are too bright
they do not produce enough heat
Why are very small stars less likely to have habitable planets than average sized stars (like our sun)?
the habitable zones would be so close that planets would be tidally locked
the habitable zones would be so close that planets would not orbit
the habitable zones would be so far that the planets would be too cold
the habitable zones would be very narrow, so it is unlikely any planets would be in it
What is the best place to look for habitable planets?
Around giant, hot stars
Around small, cool stars
Around sun-like stars (average size and temperature)
Around white dwarfs
Future missions will use telescopes to sense the reflected light of exoplanets. What biosignatures will these missions search for?
carbon dioxide, sulfuric acid
methane, nitroxide
glucose, sulfur dioxide
water vapor, oxygen, ozone
What is the term 'goldilocks zone' a nickname for?
habitable zone
mid-sized stars like our sun
mid-sized planets like our Earth
atmospheres of the right thickness
What is the Moon's most important role in making the Earth habitable?
causing tides
stabilizing Earth's axial tilt
causing seasons on Earth
blocking Earth from the sun's UV rays
Why are there seasons on Earth?
the Earth's axis is tilted about 23.4 degrees
the Earth wobbles on it's axis from 0-90 degrees
the Moon's gravity causes seasons
the Earth orbiting the sun causes seasons
Finding oxygen or ozone in another planet's atmosphere would be an indication that what process is occurring?
volcanic activity
plate tectonics
the burning of fossil fuels
photosynthesis
How many planets like Earth could there be in the Milky Way?
0
1 million
1 billion
10 billion
How do chemicals in the atmosphere leave a biosignature?
by appearing as different colors
by glowing
by causing a red-shift or blue-shift
by filtering out certain colors of light
This sphere is where you find any liquid water including any ice.
Atmosphere
Hydrosphere
Biosphere
Habitable
This sphere is where you would find a mixture of gasses surrounding the planet.
Atmosphere
Hydrosphere
Biosphere
Habitable
This sphere is where you would find any living things including plants and animals.
Atmosphere
Hydrosphere
Biosphere
Habitable
This sphere is the solid part of a rocky planet.
Geosphere
Atmosphere
Hydrosphere
Biosphere
If a planet has the necessary conditions for life to survive on the planet, that planet is said to be.
Beautiful
Habitable
Lovely
Biosphere
Which of the planets is not a rocky planet?
Mercury
Mars
Jupiter
Earth
What would you probably find in the hydrosphere?
Rocks and Mountains
Water
Life
Gasses
What would you probably find in the Geosphere?
Water
Animals
Oxygen and Carbon Dioxide
Rocks and Mountains
What would you probably find in the biosphere?
Rocks and Mountains
Animals
Oxygen and Carbon Dioxide
Water
What would you probably find in the atmosphere?
Water
Animals
Oxygen and Carbon Dioxide
Rocks and Mountains
The ocean would be part of what sphere?
Atmosphere
Biosphere
Hydrosphere
Geosphere
Which planet is the only planet so far we have found to be habitable?
Mercury
Venus
Earth
Pluto
