VIOLENT UNIVERSE – PHYSICS 006
TEST QUESTIONS AND ANSWERS
planetesimals. - ANSWER Tiny solid particles stick to form
hw4) What is interstellar dust? - ANSWER Much of the space between the
stars is filled with atomic and molecular gas (primarily hydrogen and helium)
and tiny pieces of solid particles or dust
What are the main two types of objects in the solar system that may collide with
the Earth? - ANSWER
Speed - ANSWER rate at which objects move, distance traveled in a given
time. (MPH)
Velocity - ANSWER Objects speed in a certain direction. EX: "10 M/S moving
fast"
Acceleration - ANSWER a change in objects velocity. A change in either speed
or direction is an acceleration.
forces - ANSWER forces change the motion of objects.
momentum - ANSWER he (mass x velocity) of an object.
mass - ANSWER the amount of matter in an object
weight - ANSWER measurement of the force that acts on a subject.
Newtons Law - ANSWER 1) an object left alone does't change momentum. 2)
A force can change an objects momentum. 3) For every force, there is always
equal force back. momentum is conserved
,Angular momentum - ANSWER momentum that involves spinning or circling
torque - ANSWER anything that can cause change in angular momentum
tides - ANSWER the side closest to the moon feels the bigger gravational pull.
The side closest to the moon, gets more gravational pull.
light year - ANSWER the distance that light can travel in a year.(unit of
distance not time)
hw#1. Explain the difference between mass and weight - ANSWER mass is the
actual amount of material contained in a body, & weight is the force exterded
by gravity on the object.. mass- independent, weight different on moon
hw#1What is momentum? (i.e., what quantities does it depend on?) -
ANSWER the (mass x velocity) of an object.
hw#1Write down the equation of gravity and explain what each of the variables
represents. - ANSWER Fg= (Gx(M1xM2)/d^2
hw#1What happens to the force of gravity if the distance between two objects is
doubled? - ANSWER then gravity decreases....... (if mass goes up then gravity
goes up.) & (if distance increases then gravity decreases)
hw#1During the demo in class, explain why Javier rotated faster when he
brought his arms closer to his body. - ANSWER conservation of angular
momentum
hw#1What is the difference between the "solar system" and "galaxy"? -
ANSWER solar system has the star our sun & its orbiting planets.. galaxy
contains millions of star.
hw#1Name the two types of planets in our solar system and list the names of the
planets that belong to each of the two types. - ANSWER TERRESTIAL:
(mercury, venus, earth, mars) JUVIAN PLANETS: (jupiter, saturn, uranus,
neptune)
, hw#1List at least three differences between the two types of planets. -
ANSWER terrestial planets: (smaller & mass, closer to the sun, made of mostly
rock and metal)
Juvian Planets: (large in size & mass, further from the sun, has rings & moons)
hw#1Why do all planets orbit the Sun in the same direction? - ANSWER
conservation of angular momemtum, they all form one disk.
hw#1why did the solar nebula form a disk as it collapsed? - ANSWER
interstellar of cloud of gas dust.
Asteroids - ANSWER rocky, located between mars and jupitar.
comets/dirty snowball - ANSWER Icy, located beyond neptune, where pluto is
located. The only time they grow a tail is if they enter the solar system. the tail
is ionized gas swept by the solar wind.
how did the solar system formed? - ANSWER according to the Nebular
theory., from giant cloud of interstellar gas.
Orderly Motions in Solar System - ANSWER all planets lie in one plane (in the
disk)
- all planets orbit in one direction (the spin direction of the disk)
- Sun rotates in same direction
- planets tend to rotate in this same direction
- most moons orbit in this direction
- most orbits are near circular (collisions in the disk)
hw#2. Why and how are planets inside of the frost line different from those
outside the frost line in our solar system? - ANSWER Inside the frost line,
closer to the sun so hotter & made of rocks & metals, smaller farther, cooler so
allows ei and hydrohen to form. more gravity to attract more gas so bigger.
hw#2. Explain why the Explain why the planetesimals beyond the frost line
were initially able to grow larger than those inside the frost line. beyond the
frost line were initially able to grow larger than those inside the frost line. -
ANSWER Because beyond the frost line temperatures are LOW, planetesimals
are able to grow larger because initially they are able to form as ice rocks which
TEST QUESTIONS AND ANSWERS
planetesimals. - ANSWER Tiny solid particles stick to form
hw4) What is interstellar dust? - ANSWER Much of the space between the
stars is filled with atomic and molecular gas (primarily hydrogen and helium)
and tiny pieces of solid particles or dust
What are the main two types of objects in the solar system that may collide with
the Earth? - ANSWER
Speed - ANSWER rate at which objects move, distance traveled in a given
time. (MPH)
Velocity - ANSWER Objects speed in a certain direction. EX: "10 M/S moving
fast"
Acceleration - ANSWER a change in objects velocity. A change in either speed
or direction is an acceleration.
forces - ANSWER forces change the motion of objects.
momentum - ANSWER he (mass x velocity) of an object.
mass - ANSWER the amount of matter in an object
weight - ANSWER measurement of the force that acts on a subject.
Newtons Law - ANSWER 1) an object left alone does't change momentum. 2)
A force can change an objects momentum. 3) For every force, there is always
equal force back. momentum is conserved
,Angular momentum - ANSWER momentum that involves spinning or circling
torque - ANSWER anything that can cause change in angular momentum
tides - ANSWER the side closest to the moon feels the bigger gravational pull.
The side closest to the moon, gets more gravational pull.
light year - ANSWER the distance that light can travel in a year.(unit of
distance not time)
hw#1. Explain the difference between mass and weight - ANSWER mass is the
actual amount of material contained in a body, & weight is the force exterded
by gravity on the object.. mass- independent, weight different on moon
hw#1What is momentum? (i.e., what quantities does it depend on?) -
ANSWER the (mass x velocity) of an object.
hw#1Write down the equation of gravity and explain what each of the variables
represents. - ANSWER Fg= (Gx(M1xM2)/d^2
hw#1What happens to the force of gravity if the distance between two objects is
doubled? - ANSWER then gravity decreases....... (if mass goes up then gravity
goes up.) & (if distance increases then gravity decreases)
hw#1During the demo in class, explain why Javier rotated faster when he
brought his arms closer to his body. - ANSWER conservation of angular
momentum
hw#1What is the difference between the "solar system" and "galaxy"? -
ANSWER solar system has the star our sun & its orbiting planets.. galaxy
contains millions of star.
hw#1Name the two types of planets in our solar system and list the names of the
planets that belong to each of the two types. - ANSWER TERRESTIAL:
(mercury, venus, earth, mars) JUVIAN PLANETS: (jupiter, saturn, uranus,
neptune)
, hw#1List at least three differences between the two types of planets. -
ANSWER terrestial planets: (smaller & mass, closer to the sun, made of mostly
rock and metal)
Juvian Planets: (large in size & mass, further from the sun, has rings & moons)
hw#1Why do all planets orbit the Sun in the same direction? - ANSWER
conservation of angular momemtum, they all form one disk.
hw#1why did the solar nebula form a disk as it collapsed? - ANSWER
interstellar of cloud of gas dust.
Asteroids - ANSWER rocky, located between mars and jupitar.
comets/dirty snowball - ANSWER Icy, located beyond neptune, where pluto is
located. The only time they grow a tail is if they enter the solar system. the tail
is ionized gas swept by the solar wind.
how did the solar system formed? - ANSWER according to the Nebular
theory., from giant cloud of interstellar gas.
Orderly Motions in Solar System - ANSWER all planets lie in one plane (in the
disk)
- all planets orbit in one direction (the spin direction of the disk)
- Sun rotates in same direction
- planets tend to rotate in this same direction
- most moons orbit in this direction
- most orbits are near circular (collisions in the disk)
hw#2. Why and how are planets inside of the frost line different from those
outside the frost line in our solar system? - ANSWER Inside the frost line,
closer to the sun so hotter & made of rocks & metals, smaller farther, cooler so
allows ei and hydrohen to form. more gravity to attract more gas so bigger.
hw#2. Explain why the Explain why the planetesimals beyond the frost line
were initially able to grow larger than those inside the frost line. beyond the
frost line were initially able to grow larger than those inside the frost line. -
ANSWER Because beyond the frost line temperatures are LOW, planetesimals
are able to grow larger because initially they are able to form as ice rocks which
