We
the smallest piece of matter that can still be considered matter
A golfer swinging his golf club is an example of what energy transformation?
chemical to mechanical
no definite volume and no definite shape
gas
The cart next to the board will not move unless an unbalanced force acts upon it. Why?
Inertia -- N1L
amplitude
pizza
trial mix
potting soil
heterogenous mixture
If 40% of the Potential energy in a closed system is being used, how much Kinetic energy is in that system?
60% Kinetic energy
PE+KE = 100% ALWAYS!
gas to liquid
condensation
Bob is angry! Bob punches the wall! What does the wall do -- which law?
Punch back with equal force -- Newton's 3rd Law
The number of waves that pass a give point in a given time period
frequency
the smallest piece of a compound that can exist
molecule
Jacob stretched a rubber band between his index fingers. When his friend plucked it, a sound was made. Which is the best explanation for why sound was heard? A. The air around the rubber band was heated B. The rubber band absorbs energy from the air C. The rubber band releases molecules into the air causing sound D. The rubber band vibrates the air creating longitudinal waves
What is D. The rubber band vibrates the air creating longitudinal waves.
gases
When light wave travel from one medium to another, they bend and change speed. This behavior is called what?
refraction
3Al2O3
How many atoms of Oxygen are there?
9
anything that has mass and takes up space
matter
When hiking in the woods, Kimberly came upon a waterfall. Which type of energy does moving water have?A. Electrical energy B. Mechanical Energy C. Thermal energy D. Moving water does not have energy
What is B. Mechanical Energy
Horatio was sitting by a campfire watching the logs burn. Which of the following is true?
A. The fire produces chemical change in the logs
B. The fire produces physical changes in the logs
C. The fire causes a chemical change in the logs
D. The ashes left by the logs are going to made into new logs
What is C. The fire causes a chemical change in the logs
speeding up
slowing down
changing direction
m/s2
acceleration
What is the name of the elements that are nonreactive in group 18?
Noble gases
salt water
green jello
air
homogeneous mixture
On a hot sunny day, the side walk will burn your bare feet. The side walk is heated by which form of heat transfer: conduction, convection, or radiation
has a definite shape and a definite volume
solid
speed in a given direction
velocity
Baby Karrington has gained 5 pounds in 2 weeks! The doctor says that's great! Is growing a physical or chemical change?
chemical