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Name: ____________________________________________________
Entry #: ______
Chapter 4.4: Other objects in the Solar System
Part 1
• Very small, irregular shaped, rocky bodies
• ______________________________________
• Not enough gravity to be ____________________________
Asteroid belt
• Thousands of ________________________________
• Only make up _________________________ of Earth’s Moon mass
• Never able to form intro a planet due to Jupiter's _________________________________________ pull
Near-Earth Asteroids
• Some cross Earth’s orbit and _____________________________
• There are over 4,500 known
• One _______________________ m in diameter hits about once a year
• Some are over 1 __________________________ in diameter
• _________________________________________ keep looking for near-Earth asteroids to stop a collision
Asteroid Missions
• Scientists are very interested in studying __________________________________________
• They are made up of material that have not changed since the beginning of our solar system
• Important for space travel
• NEAR Shoemaker probe orbited the ________________________________________________ and landed
• ______________________________________ Hayabusa brought back samples
• Forms a streak ___________________________________ across the sky
• _____________________________________ stars
• Light comes from the material burning up in Earth’s ________________________________________
• ___________________________________
• When earth passes through a ____________________________________ pulling in more meteors
• Small piece of matter(__________________________) before it enters earth’s atmosphere they are called
• _______________________ in size
• Boulder to a small sand grain
• __________________________ together
• Debris left over from comets
• When a meteoroid is dragged towards by ___________________________________ and enters Earth atmosphere
• Friction and atmosphere heats the object up and turns into a _____________________________
• Provide Clues from our Solar system
• Small, ______________________ objects that orbit the sun
• ____________________________ Orbits
• When the comet gets close to the sun the ice evaporates and creates an atmosphere called an _______________
• Radiation from the sun push some of the gas and dust away creating a _______________________
• Can only see be seen if they have a tail, so they only appear near the Sun
• _______________________________________
• Period is 75 years
• Next time it will pass earth is 2061
Where comets come from
• Short Period Comets
• Long Period Comet Oort
• Period less than 200 Years
• Periods ranging from a thousand to
• Kuiper Belt
millions of years
• Contains comets asteroids, and
• Oort Cloud
dwarf planets
• Very far away
• Carry material from the solar
Warm-up: Draw where you would place the following and write one fact about each: Meteor, Meteoroid, Meteorite,
Asteroid, and Comet.
Part 2
Using your Webquest worksheet. What criteria is needed to be considered to be a planet?
Dwarf Planets
• We know that dwarf planets are only this way because their pathway is not __________________________
• ____________ in our solar system
• Ceres, Pluto, Makemake, Haumea, and Eris
• Rocky Body
• Can be an __________________________________
• Located in __________________________________________________
• Spherical due to its gravitational pull
• All the outer planets are gaseous except for __________________________
• Small and ______________
• Orbit is ______________________
• In ____________________________________
• 3 moons
• Shaped like an _____________________________
• Orbit is ___________________________________
• 283 years to orbit
• 4 hours to rotate
• Rocky
• ___________________________________
• ___________________________________
• Formed from an impact
• Revolves every __________________________ years
• _______________________________ of methane, ethane, and nitrogen ices
• Pluto's sister
• _________________________________ dwarf planet
• _________________________________