Planets - Sheet1 Flashcards
Mercury
What is the smallest planet?
Venus
Which planet is covered with clouds?
Earth
Which planet is the only one with liquid water and an atmosphere that allows life?
Mercury
Which planet is closest to the sun?
Mars
Which planet is known as the red planet?
Venus
Which planet is the hottest?
patterns
Objects in the sky have ________________ of motion.
orbit
The path a planet takes around the sun is called an _______________.
rotation
Night and day are caused by the _______ of the earth.
east/west
The sun appears to move across the sky from ___________ to __________.
star
The sun is a medium-sized ____________.
sun
The ________________ has most of the mass of our solar system.
energy
The sun is the major source of ____________ for the earth.
planet
A _________________ is a ball of rock or gas that orbits a star.
rocky
The four inner planets are called _________ planets.
the sun
What is the center of our solar system?
Jupiter
Which planet is the largest?
Saturn
Which planet is best know for its rings?
Jupiter
Which planet has a red spot?
Uranus
Which planet spins like a top on its side?
Neptune
Which planet is farthest from the sun?
asteroids
Small rocky objects in space that orbit the sun are called ______________.
telescope
A tool that helps us see objects that are far away is called a ______________.
constellations
Stars appear to form patterns in the sky called _______________.
astronomers
People who study the stars and planets are called ___________________.
gas giants
The four inner planets are called rocky planets. What are the four outer planets called?
Mars and Jupiter
What two planets have an asteroid belt between them?
Pluto
What dwarf planet was once classified as a planet?
Venus
What is the hottest planet?
Mercury
Which planet is the closest to the sun?
Mercury
What is the smallest planet?
Venus
Which planet is covered with clouds and second from the sun?
Earth
Which is the only planet with liquid wate and an atmosphere that allows life?
Mars
Which planet is red?
Saturn
Which planet is best known for its rings?
Uranus
Which planet spins on its side?
the sun
What is the major source of energy for the earth?
the earth’s rotation
What causes night and day on the earth?
an imaginary line that Earth spins around as it rotates
axis
the path of one object in space around another object
orbit
a device people use to observe distant objects with their eyes
telescope
any natural body that revolves around a planet
moon
the different shapes that Earth’s moon seems to have
phase
The _________ ________,(about June 21st in the Northern Hemisphere) is the day of the year that has the most sunlight.
summer solstice
The __________ _________,(about December 21st) is the day that has the most hours of darkness.
winter solstice
The ______ _________(about September 21st) and the _______ _______(about March 21st) are the days the hours of daylight and darkness are the same.These dates mark the beginning of autumn and of the spring.
autumn equinox
Dark areas on the Moon’s surface are large flat areas called ________.
mares
Is the Italian word for sea
mare
The moon’s surface is _______,_______, and full of __________. It has __________ and_________,smooth areas and hilly ones. There is no ________ water.
rocky
Why does the moon have more craters than the Earth?
Unlike Earth,which has a thick layer of air around it,the moon has no atmosphere to protect it, so the rocks from space crash into it.
__________ are low areas with high rims that form when rocks and other objects crash into the moon.
craters
Why do craters last a long time on the moon?
There is no water to wear the rims down.
__________ is a small planetlike body that revolves around Earth, instead of the Sun.
Moon
When the moon is visible at night,why can we see it?
Light from the sun reflects from the moon.
The phases of the moon follow the same pattern about every __________ days.
29 1/2
Phases of the Moon
New Moon—–First Quarter—–Full Moon—–Third Quarter—-New Moon
On one of those days,all of the lit side of the moon can be seen from Earth. When this happens, we say there is a _________ ________.
full moon
When we see none of the lit side of the moon at all, on that night, the moon is called a _____ _____.
new moon
What occurs after three years have 365 days each?
Leap Year
Most calenders are based on the _______ year.
solar
Every four years we have a __________ year
Leap
