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Assessment-Gravity Mass & Distance (Other Teachers)

Online Assessment
Instructions
1) Type in your first and last name in the “Name” box in the top-left corner.
2) Next type in your teacher’s name in the “ID” box.
3) Then type in your school’s full name in the “Email” box.
4) Select the best answer for each question.
5) When you are finished click the “Grade and Submit” button.
6) The grade will be emailed to your teacher.
 

 1. 
NOTE: If your teacher’s last name is Elliott, then you are doing the wrong assessment.
---This assessment is only for students of other teachers.
---If your teacher is Mr. Elliott, then please go back to the website and click on the first assessment link instead. Thanks!

Two Planets
(far apart)
Two Planets
(close together)
.
mc001-1.jpg
.
mc001-2.jpg
.
When will the gravitational attraction be the weakest between two nearly identical planets, each with the same approximate mass?
a.
they are 5 million kilometers apart
c.
they are 3.2 million kilometers apart
b.
they are 225, 000 kilometers apart
d.
they are 2.6 million kilometers apart
 

 2. 
In 1867 Isaac Newton published his ideas about the attractive universal force called gravity.
Which of these affects the strength of the gravitational force between Earth and the moon?
a.
the amount of energy Earth receives from the sun
b.
the spherical shapes of the Earth and the Moon
c.
the mass of the Moon and mass of the Earth
d.
 the rotational motion of planet Earth
 

 3. 

Asteroids
(close together)
Asteroids
(farther apart)
.
.
mc003-1.jpg
.
.
.
mc003-2.jpg
.
Two objects in our solar system’s asteroid belt are drawn together due to gravity.
When will the gravitational attraction be greatest between these two asteroids?
a.
when they are 100 meters apart
c.
when they are 25 meters apart
b.
when they are 3 meters apart
d.
when they are 5 meters apart
 

 4. 

The Moon
Saturn
Earth
mc004-1.jpg
mc004-2.jpg
mc004-3.jpg
Mass: 0.0123 ME
Mass: 95.159 ME
Mass: 1.000 ME
Examine the diagrams displayed above: (1) The Moon, (2) Saturn, and (3) The Earth.
Which of these celestial objects has the GREATEST amount of gravity and why?
a.
Saturn has the least gravity because it has the largest amount of mass.
b.
The Moon has the least gravity because it has the smallest amount of mass.
c.
Earth has the least gravity because it has the least amount of mass.
d.
Saturn has the greatest gravity because it has the largest amount of mass.
 

 5. 
A solar system is discovered that has three planets revolving around a single star
(see diagram below).
.
mc005-1.jpg
.
Which planet in this solar system has the least gravitational attraction to the star?
a.
Planet X
b.
Planet Y
c.
Planet Z
d.
Planet 3
 

 6. 
Scientists observe a distant star with four planets revolving around it. They determine that the four planets have nearly identical diameters but approximately the same mass.
.mc006-1.jpg.
Which planet has the greatest gravitational attraction to the star?
a.
Planet 4
b.
Planet 1
c.
Planet 3
d.
Planet 2
 

 7. 
.
mc007-1.jpg
.
If Earth and Jupiter were the same distance away from the sun, which planet would have a greater gravitational attraction to the sun and why?
a.
Earth would have a greater gravitational attraction to the sun, because Earth has a greater density than Jupiter.
b.
Jupiter would have a greater gravitational attraction to the sun, because Jupiter has more mass than Earth.
c.
Earth would have a greater gravitational attraction to the sun, because Earth has a higher average temperature than Jupiter.
d.
Jupiter would have a greater gravitational attraction to the sun, because Jupiter has a larger volume than Earth.
 

 8. 
At the center of our Milky Way galaxy, there is a super-massive black hole. The gravity from this black hole is tremendous. Yet planet Earth is in no danger from this huge black hole.
mc008-1.jpg
Select the answer that correctly explains this.
a.
This black hole’s mass is 3 million times greater than our sun.  So it is no danger to us.
b.
The affect of gravity decreases over distance, and this black hole is very far away.
c.
This black hole contains a singularity which reduces the gravitation force to zero.
d.
Unlike other celestial objects, black holes do not have any gravity.
 

 9. 

The Sun
The Moon
.
mc009-1.jpg
.

.
.
.
.
mc009-2.jpg
.
The sun contains much more mass than the Moon. In fact the Sun contains more mass than all the planets and moons in our solar system combined.
Which statement best explains why the moon, despite its smaller size, has a greater effect on Earth’s ocean tides than the sun does?
a.
The moon has a lower surface temperature.
b.
The moon is much closer to Earth.
c.
The moon produces less light than the sun.
d.
The moon and Earth have the same composition.
 

 10. 

Earth
Unopened can of Coke
Moon
.
mc010-1.jpg
.
mc010-2.jpg
.
.

.
mc010-3.jpg
On Earth an unopened can of Coke weighs about 390 Newtons. The same unopened can on the Moon weighs about 65 Newtons because the Moon has less gravity than Earth. 
Why does the Moon have less gravity than planet Earth?
a.
The Moon contains less matter than Earth (less mass).
b.
The Moon contains less water (H2O) than the Earth.
c.
The Moon contains fewer chemical elements than Earth.
d.
The Earth has less matter than the Moon (less mass).
 



 
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