Lesson 2 Flashcards
Satellite
A natural or artificial object in space that circles around another object.
Phases
The appearance of the shape of the Moon at a particular time.
Tide
The regular rise and fall of the water level along a shoreline.
Solar eclipse
A blocking of the Sun’s light that happens when Earth passes through the Moon’s shadow.
Lunar eclipse
A situation that occurs when Earth, the Sun, the Moon are in a straight line and Earth’s shadow falls across the Moon.
One of many small, rocky objects between Mars and Jupiter
Asteroid
A chunk of rock from space that travels through Earth’s atmosphere
Meteor
A mixture of ice, frozen gases, rocky and dust left over from the formation of the solar system
Comet
An object in space that produces its own energy,including heat and light
Star
A huge cloud of gas and dust in space that is the first stage of star formation
Nebula
An object whose gravity is so strong that light cannot escape it
Black hole
The distance light travels in a year
Light year
A star that can no longer turn helium into carbon; it cools and shrinks, becoming very small and dense
White dwarf
Any of the patterns that are formed by a group of stars in the night sky
Constellation
A star that has produced more energy than gravity can hold together and has exploded
Supernova
As the Earth revolves around the Sun the ______________ revolves around the Earth.
Moon
The Moon’s orbit around the Earth takes ______________ days.
29
The apparent shapes of the Moons are called ______________.
Phases
________________ phase is when you can’t see the moon at all.
New Moon
_______________ phase is almost a full moon.
Gibbous moon
________________ phase is when you see a sliver of the moon.
Crescent Moon
__________________ phase is when the moon appears smaller.
Waning
_________________ phase is when the moon appears larger
Wacing
The moon’s gravitational pull causes the tides and it happens twice a day the rise and fall of the tides are called a ______________ and ______________.
High tides and low tides
________________ are small rocky or metallic object that orbits the Sun in both the inner and outer regions of the Solar System.
Meteoroids
_______________ is a meteor that hits the Earth’s surface.
Meteorites
The head of a comet is made up of a _______________ and nucleus.
Coma
A ___________ is formed when the heat from the Sun’s rays pushes some of the coma away from the comet.
Glowing tail
Stars have different colors.Colors occur because of the surface ______________ of each star.
Temperature
Sun’s temperature makes it look _______________.
Yellow
Cooler stars appear _____________ or ______________
Red and orange
Warmer stars appear _______________ or ________________
White and Blue
The Sun is about ____________ years old.
5 billion
It takes 8 minutes for ____________ to reach Earth.
Light
Astronomers use _______________ to describe the great distance between stars.
Light years
Constellation are named after ______________ ____________ or objects.
Animals and Fictional characters
There are ______ constellation.
88
Travelers can use the Big Dipper or the Little Dipper to find ____________ which tells you which direction is ____________.
Polaris and North
The Sun contains 99% of the Solar System’s total _______________.
Mass
92% of the Sun is made up of _____________ gas.
Hydrogen
________________ are the sudden release of energy from the Sun’s atmosphere.
Solar flares
