Chemical change
What is the formula for speed?
distance/time
The _____ form a passageway for air to enter the body and waste gases to exit the body.
a. heart and blood vessels
b. bladder and kidneys
c. nose, throat, and trachea
d. mouth, esophagus, and stomach
c. nose, throat, and trachea
What system includes the brain and spinal cord?
nervous system
Motion is a change in ________.
a. energy
b. matter
c. force
d. position
d. position
When your eyes squint when a light is too bright, what two systems are involved in this process?
a. circulatory and respiratory
b. nervous and respiratory
c. nervous and muscular
d. circulatory and muscular
c. nervous and muscular
A flat, horizontal line on a distance-time graph shows what type of motion?
No motion
Friction acts in the ______ direction of a moving object.
opposite
Which of the following organs are made of spongy tissue that provide lots of surface area to increase contact with the air?
a. nerves
b. kidneys
c. intestines
d. lungs
d. lungs
What force helps mass determine the weight of an object?
gravity
A pan balance scale measures ______.
mass
oxygen, carbon dioxide
nerves
The amount of matter in an object is _____.
mass
What is measured by a spring scale?
weight
A campfire giving off heat is an example of what type of heat transfer?
radiation
conduction
Water boiling in a pot is an example of which type of heat transfer?
convection
If you hit your knee while you are walking, how do you know that you hurt your knee?
a. Your knee became smaller than it was before
b. The blood cells in your toe sent a signal through your leg to your brain
c. The nerves in your knee sent a signal through your body to your brain
d. Your knee became cold and numb
c. The nerves in your knee sent a signal through your body to your brain
Which force is there is less of when you slip and fall on water?
friction
A bicycle rusting is a ______ change.
chemical
Every force is either a _____ or a ______.
push/pull
Gravity ______ objects toward the center of the earth.
pulls
What is the control center of your body?
brain
Which systems does the nervous system control?
all