Planets
Name the planets in order
mercury, venus, earth, mars, jupiter, saturn, uranus, neptune
a meteroid that strikes a planet or moon is called a...
meteorite
The time it takes an object to travel once around the sun is called...
The period of revolution
more than 80% of venus is covered by
solidified lava
the sun is a...
star
which planets are our terrestrial planets?
Mercury, Venus, Earth, Mars
what is a comet made of?
rock, ice, and dust
The average distane from the Earth to the Sun is called
The astronomical Unit
what is the largest planet in the solar system?
Jupiter
the sun and the group of objects that move around it are called the ...
solar system
Which Planets are our gas giants?
Jupiter, saturn, uranus, neptune
comet
Wind on this planet can produce dust storms that last for months
list four objects that orbit the sun...
planets, astroids, dwarf planets, comets
the solid inner part of a comet is called the
nucleus
which planet is the least dense?
saturn
How many moons does neptune have?
16
Polar ice caps are made of ...
carbon dioxide and ice
which planet has an outer gas layer, and a thick layer of hydrogen and a solid core?
saturn
what is the smallest planet in our solar system?
mercury
The strength of a planets gravity depends on what?
The planets mass
contrast comets and astroids
Asteroids-
Orbit the Sun in the asteroid belt between the orbits of Mars and Jupiter.
Size: less than a meter to several kilometers in length.
Usually not spherical.
Pieces of rock and ice
Most orbit the Sun in the asteroid belt
Asteroid belt is between Mars and Jupiter
Comets-
Made of gas, dust, and ice.
Move around the Sun in an oval-shaped orbit.
Mixtures of rock, ice, and dust
Loosely held together by gravitational attractions among the particles
Solid inner part- nucleus
As it moves closer to the Sun it absorbs thermal energy and can develop a bright tail
Coma- comets bright tail and glowing nucleus
where is the largest known mountain located and what is it called?
olympus mons, on mars
On venus, describe what is unique about its period of rotation vs its period of revolution
rotation is longer than revolution
what is the purpose of the Artemis space program?
to return humans to the Moon, establish a sustainable presence there, and use the Moon as a stepping stone for future human missions to Mars