Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
ROTATION
|
Means to rotate on an axis, which on Earth takes 24 hours. (Causes day and night.)
memory trick: rotate and axis both contain an "a". |
|
|
REVOLUTION
|
Means to orbit/revolve around the sun, which on Earth takes 365 1/4 days.
|
|
|
AXIS
|
The imaginary line through both poles of a planet.
|
|
|
SUN
|
A giant star at the center of our solar system. It is the nearest star to Earth.
|
|
|
SOLAR SYSTEM
|
A sun and the planets/objects that revolve around it.
Our solar system: 1 star, 8 planets, and 5 dwarf planets. |
|
|
GALAXY
|
A group of solar systems connected by a common gravity. Ours is the Milky Way.
|
|
|
GALACTIC YEAR
|
The time it takes for the sun to orbit around the center of the galaxy - about once every 250 million years.
|
|
|
MOON PHASES
|
Caused by reflecting sunlight as the moon circles Earth. Even though the moon looks different from day to day as it orbits Earth, it really doesn't change.
|
|
|
INNER PLANETS
|
Mercury, Venus, Earth, Mars
*the rocky planets *terrestrial (means land) planets *small/dense - limited in size (Mercury/smallest, Earth/largest) |
|
|
OUTER PLANETS
|
Jupiter, Saturn, Uranus, Neptune
*the gas giants - not solid surfaces *low densities - much larger than the inner planets *all have rings, moons and are extremely cold! |
|
|
DWARF PLANETS
|
There are 5: Ceres, Pluto, Haumea, Makemake, Eris
* Small bodies in orbit around the sun that have nearly round shapes. |
|
|
SEASONS
|
The Earth's axis is tilted at 23.5 as it revolves around the sun. Our part of the Earth is tilted toward the sun during our summer.
*There would be no seasons and the temperature would remain constant (same) if the Earth's axis had no tilt. |
|
|
ORDER OF PLANETS FROM THE SUN
|
MERCURY, VENUS, EARTH, MARS,
(MY VERY EXCELLENT MOTHER) JUPITER, SATURN, URANUS, NEPTUNE (JUST SERVED US NOODLES) |
|
|
ORDER OF PLANETS FROM SMALLEST TO LARGEST
|
MERCURY, MARS, VENUS, EARTH, NEPTUNE, URANUS, SATURN, JUPITER
|
