Unit Checklist (Print out
in htm or doc)p
T / F
| Check
your "Prior Knowledge". |
T/F
|
| What goes up, must come down. |
. |
| Gravity pulls the same everywhere on earth. |
. |
| Gravity is measured in lbs/sq.in. |
. |
| Tidal waves are caused by the moon. |
. |
Pic 1
"A picture is worth a thousand words".
Does this many weigh more on the mountain or down at the beach?
Reading Assignment - TBA
Activities
1. What
is gravity?
Read the article about gravity and:
a). Write your own definition for gravity.
b). Determine your force of gravity on the earth (hint: Fgrav=m*g)
c). Check out the gravity
simulation.
2. Did you know?
Sir Issac Newton, who published his laws of motion in 1687 in
the monumental work Mathematical Principles of Natural Philosophy,
had a fundamental belief that guided his work: "As below,
so above". In other words, by understanding why objects
move the way they do here on Earth, we should be able to understand
the motions of the planets. Newton, therefore, studied motion
in detail, making many new observations. His observations led
him to derive three laws that govern the forces in our universe.
For Issac, F describes the force acting (in our case gravity),
m is the mass of any object (you for example), and a is its
acceleration, (or attraction to the center of the earth). In
the metric system, this unit of force is called a Newton, whose
abbreviation is "N". A Newton is equal to 1 kgom/s2.
In our English system, the unit of force is the pound; it is
equal to 4.45 N.
a). Why did Newton study motion here on earth?
3.
Three Types of Gravity.
This
explanation separates gravity into three generally held views
of gravity.
State them in your own words without using numbers. (Make
certain you understand the third use.)
4. Keppler, Orbits
& Gravity
a. Check out the orbits on this
java applet.
5. Gravity
and Tides.
Gravity here on earth has many effects on our planet. Ocean
tides are created by the interaction of Earth's gravity interacting
with the gravity from the Sun and Moon. Gravity, pulling in
three directions at the same time, does strange things to our
oceans.
a). Write a paragraph on how this effects our oceans and explain
your reasoning behind your answer.
6. Poem
- Read and comment on how light is used in common expression.
Lab - No lab this lesson.
T / F
| Now check
your "Present Knowledge". (Answers at bottom of
page.) |
T/F
|
| What goes up, must come down. |
. |
| Gravity pulls the same everywhere on earth. |
. |
| Gravity is measured in lbs/sq.in. |
. |
| Tidal waves are caused by the moon. |
. |
Pic 2
This picture is worth YOUR thousand words
(250 at least).
Discuss ALL the different aspects of gravity encompassed in
this picture.
Vocabulary - These
are important terms used in this unit.
By the end of this study you should be familiar with
all of them. Define in writing all the word you don't know.
· Gravity
· Mass
· Weight
· Forces
· Newtons
· Tides