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;
41 Cards in this Set
- Front
- Back
|
Which planet could float on water? (density less than 1 g/mL) |
Saturn |
|
|
Which planet experiences an extreme greenhouse effect? |
Venus |
|
|
Which planet has long gullies that may have been caused by flowing water? |
Mars |
|
|
small rocky particles that move through space |
meteoroid |
|
|
a streak of light in Earth's atmosphere; when a meteoroid enters Earth's atmosphere |
meteor |
|
|
a meteoroid that strikes a planet or a moon |
meteorite |
|
|
a group of small, rocky planets; solid outer layer |
inner planets |
|
|
another name for outer planets |
gas giants |
|
|
an object that orbits a star, has enough mass and gravity to be spherical in shape, and has similar objects orbiting nearby |
dwarf planets |
|
|
Saturn's moon Titan is larger than which planet |
Mercury |
|
|
Names of Inner planets |
Mercury, Venus, Earth, Mars |
|
|
Which planet has no atmosphere? |
Mercury |
|
|
Neptune was the last planet to be visited by which space probe? |
Voyager II |
|
|
Name of Pluto's moon that is half it's diameter |
Charon |
|
|
How does a comet develop a tail? |
the sun's energy |
|
|
largest planet with colorful clouds |
Jupiter |
|
|
occurs when a planet's atmosphere traps solar energy and causes the surface temperature to increase |
greenhouse effect |
|
|
Earth's average distance from the Sun |
one Astronomical unit |
|
|
basic shape of every planet's orbit |
ellipse |
|
|
What causes planets and other space objects to revolve around the Sun rather than going off in a straight line due to inertia? |
gravity - the Sun is pulling the object toward it |
|
|
Although Mercury is closer to the Sun, why is Venus hotter? |
Mercury has no atmosphere to trap the heat and Venus has a dense atmosphere, greenhouse gases that cause it to retain heat energy |
|
|
Which of the inner planets have atmospheres made up mostly of carbon dioxide?
|
Venus (97%) and Mars (95%) |
|
|
Which two gases are the outer planets mostly composed of? |
hydrogen and helium |
|
|
What allows the hydrogen and helium gases to be in liquid form on the outer planets? |
pressure from the gravitational forces |
|
|
All of the outer planets have what two things? |
ring systems and moons |
|
|
Scientists believe that all of the outer planets have ... |
small solid cores |
|
|
Which dwarf planet is located in the asteroid belt? |
Ceres |
|
|
the time it takes a planet or any other object to travel once around the Sun |
period of revolution |
|
|
the time it takes a planet or any other object to spin or rotate once |
period of rotation |
|
|
Why is Mercury not strong enough for gravity to hold an atmosphere? |
too small |
|
|
planet with dark color storms and 13 moons |
Neptune |
|
|
planet with iron oxide and polar ice caps |
Mars |
|
|
planet with most complex ring system |
Saturn |
|
|
planet with axis of rotation tilted on its side |
Uranus |
|
|
planet with liquid water oceans |
Earth |
|
|
Starting with the planet closest to Sun...list them in order. |
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune |
|
|
What does it take for an object to be considered a planet? |
a spherical shape, mass of a planet must be much larger than the total mass of all other objects whose orbits are close by |
|
|
What is the structure of the outer planets? |
have thick gas and liquid layers covering a small solid core |
|
|
compare Jupiter's rotation to that of other planets |
Jupiter has fastest rotation of all planets (10 hours) |
|
|
pieces of rock and ice, vary in size, usually not spherical |
asteroids |
|
|
mixture of rock, ice, and dust held loosely together by their gravitational pull; travel in very long stretched out elliptical orbits |
comets |
