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Mr Mac Space

Space/Solar System Flash Cards

List the planets in order beginning from the sun. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune
The first 4 planets (inner planets) are what kind of planets? terrestrial
The 4 planets farthest from the sun (outer planets)are what kind of planets? gas giants
What is astronomy? The study of space.
Our solar system is located where? An outer arm (called Orion) of the Milky Way Galaxy.
Pluto is no longer a planet because it is to small? True or False False! It has an irregular orbit that has not been cleared of other objects.
What are the 3 characteristics that define a planet? 1. The body of the object is round from it's own gravity 2. It's orbit is clear of other objects 3. It orbits a star.
What kind of planet is Pluto? Dwarf planet
Is Pluto the only Dwarf planet? No, Ceres, Eris, Haumea and Makemake are others, and there are more to come.
Name the outer planets. Jupiter, Saturn, Uranus and Neptune
What can be found between Mars and Jupiter? The Asteroid Belt. (and Dwarf Planet Ceres)
Where is Pluto located? The Kuiper Belt -some of the time and between Neptune and Uranus other times.
Name somethings in our solar system that are not planets. Asteroids and Asteroid Belt, KBOs and Kuiper Belt, comets, Dwarf Planets -Pluto, Eris and Ceres,and the Sun
How is a meteor and a meteorite different? A meteorite hits the Earth's surface and a meteor is only the name of the object when it is traveling through the atmosphere.
Supernova the explosion of a large star -incredible amounts of energy and matter are released
Which planets have the most moons? The larger ones: Jupiter and Saturn
Do all 4 gas giants have rings? yes
Name some Dwarf Planets other than Pluto. Ceres, Eris, Haumea, Makemake
Why does Venus stay so hot? It's atmosphere of carbon dioxide traps the Sun's energy as heat close to the surface.
Why is Mars red? The iron oxide (rust) on it's surface.
Dark energy is used to explain what? Why the universe is believed to expanding faster and faster.
Which is believed to be a stronger force: dark energy or dark matter? Dark energy -If dark matter was stronger the universe would be slowing down due to the gravity of all matter.
Name some different types of telescopes. radio wave, x-ray, optical, infrared, ultraviolet and gamma ray
What telescope(s) collect information from light we cannot see. ultraviolet and infrared telescopes
Which telescope(s) collect information from visible light sources. optical telescopes
What gases are the gas giants mainly composed of? hydrogen and helium
What is a large ball of super hot glowing hydrogen and helium? A star
Where is a comet's tail located? directly away from the sun
What unit of measurement is the average distance from Earth to the Sun? An au or astronomical unit
Is Venus more than 1au from the Sun or less than 1au from the Sun? Less than 1 astronomical unit
Is Jupiter more than 1au from the sun or less than 1au from the Sun? More than 1 astronomical unit
What unit is used to measure how far other stars are from Earth? Light years
How long is a light year? The distance light travels in 1 year. exactly 9,460,730,472,580.8 km about 5,878,625,373,183.608 miles about 63,241.1 astronomical units
How long is an astronomical unit? The average distance from the Earth to the Sun. about 149,597,870.7 km
What is between Mars and Jupiter? The Asteroid Belt and Dwarf Planet Ceres
What is located beyond Neptune? The Kuiper Belt with Dwarf planets Pluto, Eris, Makemake and Haumea
Pluto was demoted to dwarf planet status because it did not fit one of the 3 criteria for being a planet. Which one did Pluto fall short on? It has not cleared it's orbit of other objects.
Which is longer an astronomical unit or a light year? Light year (it is much greater distance)
Name the different types of galaxies. Spiral, elliptical and irregular/peculiar.
The Milky Way is what type of galaxy? Spiral
A galaxy with no clear shape is a... irregular galaxy (or peculiar galaxy)
a group of stars, planets and other objects traveling through space together is called what? a galaxy
If you see a shooting star, you are looking at a ______________. meteor (burning up!)
What is the largest planet in our solar system? Jupiter
Which terrestrial planet has the hottest surface temperature? Venus
Mercury is closest to the sun. What makes Venus hotter than Mercury? The atmosphere filled with green house gases like carbon dioxide.
Which planet has the longest day? Venus! It's days are longer than it's years!
Which planet has the shortest day? Jupiter! It rotates or spins very fast.
Which planet has a year that is 365.25 days long? Earth
Which planet has the longest year? Neptune of course! It is the farthest from the sun. The dwarf planets in the Kuiper belt would even have longer years.
Which planet has the shortest year? Mercury It is closest to the sun so it's orbit is shortest.
Are the gas giants made mostly of hydrogen and helium like the sun? yes
Why are Earth and Venus sometimes called sister planets? They are similar in size, both inner and terrestrial planets and they are next to each other.
Should we send a probe to land on Jupiter? Why or why not? No, it is a gas giant it has no surface.
Why do some scientist think Jupiter was on it's way to becoming a star? It is big and made of mostly of hydrogen and helium gas.
How many Venus sized planets would fit inside Earth? about 1
Optical telescopes collect information carried on ... ...visible light
Who was Galileo? An Italian scientist/astronomer who made great discoveries with the telescope, including the rings of Saturn and moons of Jupiter. He also improved upon the design of the telescope.
Why did Galileo spend the last years of his life under arrest. He supported the Copernicus' heliocentric model of the universe, which was heresy (against religious teachings).
The force of Gravity is effected by what to things? Mass and Distance
All matter is attracted to each other by a force called... Gravity
If the Sun's gravity is pulling Earth and the other planets toward it. Why hasn't Earth been pulled into the Sun yet? The Earth has inertia. Earth's inertia is perpendicular to the gravity of the Sun.
When the Sun's energy is directly hitting the Tropic of Cancer, what season are we having? Summer!
The Earth's spins on an axis. This axis is tilted at 23.5 degrees. This is one of the main reasons for our seasons. True or False? TRUE
Name specific things Galileo discovered. Rings of Saturn and moons of Jupiter
The moon looks different every night, why? The Sun shines on different parts and we can only see the same side with different amounts of light.
When the Sun shines totally on the side we see, this is called a... full moon.
When the sun shines on the side we cannot see, this is called a... new moon.
When the sun shines on over half of the side we can see, we call this a... gibbous moon
Created by: MrMac



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