Complete this week’s CRCT warmups. The worksheet will be collected
today so be sure your name is on the
worksheet.
16.Gravitational force between two masses
______ as the distance between the masses
decreases and rapidly ______ as the
distance between the masses increases.
A.
B.
C.
D.
increases, increases
decreases, decreases
decreases, increases
increases, decreases
17. Two forces are acting on an object, but the net
force on the object is 0 N. For the net force to be 0
N, all the forces on the object must cancel. What
must be true for the two forces on the object to
cancel?
A. The forces are the same size and in the same direction.
B. The forces are different sizes and in the same direction.
C. The forces are the same size and in opposite directions.
D. The forces are different sizes and in opposite directions.
18. Which of the following always causes change in
speed, direction, or both?
A.
B.
C.
D.
balanced forces
unbalanced forces
either balanced or unbalanced forces
more than three forces
19. During a space shuttle launch, about 830,000 kg of
fuel is burned in 8 min. The fuel provides the
shuttle with a constant thrust, or forward force.
How does Newton’s second law of motion explain
why the shuttle’s acceleration increases as the fuel
is burned?
20. Suppose you are standing on a skateboard or on
in-line skates and you toss a backpack full of heavy
books toward your friend. What do you think will
happen to you? Explain your answer in terms of
Newton’s third law of motion.
Student #1 – Fans the cards face down
Student #2 – Picks a card and read the
question; pass card to student #4
Student #3 – Answers the question
Student #4 – Praise if correct or tutor if
wrong
Rotate positions; repeat until all twelve
cards are used!
S8P4. Students will explore the wave nature of
sound and electromagnetic radiation.
f. Diagram the parts of the wave and explain how
the parts are affected by changes in amplitude
and pitch.
What characteristic of a
wave – wavelength,
amplitude, or frequency –
make a tsunami so
destructive?
http://www.cnn.com/
Cause rhythmic disturbances in a
medium
Travel through a medium
Transmit energy
Leave the medium unchanged.
2. An ocean wave has a length of 10.0 m. Two
waves pass a fixed point every 1.0 s. What is
the speed of the wave? (Hint: Determine the
frequency of the wave first.)
2 waves = 2 hertz
1.0 s
2. An ocean wave has a length of 10.0 m. Two
waves pass a fixed point every 1.0 s. What is
the speed of the wave? (Hint: Determine the
frequency of the wave first.)
Find: ________ Formula: ___________________
Given:
Apply & Solve
Characteristics of a Compressional or
Longitudinal Wave
Compression – crowded or dense area
Rarefaction – less dense or spread out area
Characteristics of a Compressional or
Longitudinal Wave
Wave Cycle – one compression and one
rarefaction
Characteristics of a Compressional or
Longitudinal Wave
Wavelength – distance between two
compressions
Characteristics of a Compressional or
Longitudinal Wave
Amplitude – measure of the amount of
compression; depends on the amount of energy
being transferred
Characteristics of a Compressional or
Longitudinal Wave
Frequency – number of compressions that pass
a stationary point in one second
Find a partner. Use your notes
and your brains to complete the
mechanical wave map.
Work with your
cooperative team to
create the best map
comparing transverse and
longitudinal waves!