Earth & The Universe

Moon

the “blank” is a natural satelite that orbits around Earth.

Gravitational Pull

the “blank” between the Earth and Moon causes the tides to rise and fall.

Moon Phases

caused by the position of the moon, Earth, and the Sun. 

What causes moon phases?

moon orbits the earth, we can see a different amount of the moon lit by the sun

Seasons

caused by the 23.5 degree tilt of the Earth.

DOES NOT CAUSE SEASONS

rotation & revolution of the Earth

Sun is higher in the sky during….?

Summer

Northern Hemisphere tilts towards the Sun

more direct sunlight resulting in Summer

When North Pole is tilted away from the Sun, it’s further away

gives it less direct sunlight resulting in Winter

Sun is lower in the sky during….?

Winter

Southern & Northern Hemispheres

have opposite seasons

Why are there no seasons at the equator?

sun is always high in the sky there, it is always warm.

Earth revolves around the?

Sun

Revolution, Revolve

circling of one object around another in space 

Earth rotates on?

Axis

Axis

imaginary line going from the North & South Pole, earth spins on this line.

Two major effects from Earth’s tilt

angle of sun to earth & length of days

1 earth rotation around the sun is?

a year

Earth rotates on it’s axis every 24 hours to make

one day

Sun

largest thing in the solar system

Suns size give it 

strong gravitational pull

Keeps the Earth, stars, the moons & other planets in line

The Sun

Without the gravity of the Sun

Earth would go spinning off into space

The Sun is a star made up of

hydrogen & helium gasses, as well as smaller amounts of other elements.

The inner core is hotter than the?

outter core

Light Years

unit scientists used to describe distance of objects in space

A Light Year

distance light travels in one Earth year.

1 Light Year = ?

about 6 trillion miles

Lunar Eclipse

earth blocks the sunlight from reaching the moon, glows a dim orange/red color

Is it safe to view a Lunar Eclipse?

yes

Solar Eclipse

moon comes between sun & earth, prevents sunlight from reaching earth, moons shadow makes the sky grows darker

Partial Eclipse

only a portion of the sun or moon is blocked

Total Eclipse

sun and moon are completely covered.