Forces and Motion
an object's speed and direction
what is velocity?
the center of the bone is usually filled with this
what is marrow?
the type of muscle found only in the heart
what is cardiac?
the pH scale goes from 0 to this
the thing a scientist is testing
what is the independent variable?
the unit used to measure force
what is a Newton?
the smooth, slippery substance at the ends of bones that helps joints move
what is cartilage?
the type of muscle that you can control consciously
what is voluntary or skeletal?
a protein that can speed up chemical reactions in the body
what is an enzyme?
the enzyme that breaks down the sugar in milk
what is lactase?
Newton's second law
what is F=ma
the layer of bone that makes it lightweight
what is spongy bone?
tendons
what are the things that connect muscles to bones?
the part of the enzyme that makes it only work on one thing
what is the active site?
the type of joint that can only move in one plane
what is a hinge joint?
the force that accelerates everything toward Earth at 9.8m/s2
what is gravity?
the layer of bone that makes it extremely strong
what is compact bone?
muscles that you are not aware of
what are involuntary muscles? (or smooth muscles or cardiac muscles)
anything that has mass and takes up space
what is matter?
the data collected in a lab
what is the dependent variable?
the property of matter that makes it resist changing its motion
what is inertia?
the least stable type of joint
what is a ball and socket?
the type of muscle in the walls of the stomach
what is smooth muscle?
the type of digestion that enzymes are involved in
The information on the x-axis of a graph
what is the independent variable?
the amount of force needed to overcome inertia depends on how fast it needs to accelerate, and this
what is the mass of the object?
the type of joint found in the wrists and ankles
what are gliding joints?
what muscles are made up of
what are fibers (or cells, or bundles of bundles)?
the smallest particle of matter
what is an atom?
the factors that could affect results of a lab so you hold them constant for all treatments
what are controlled variables?
the acceleration if a 30N force is applied to a 15kg ball
what is 2m/s2?
a job of the skeletal system along with movement and protection
correct answer is any one or more of:
what is makes blood cells?
what is stores nutrients?
what is gives shape and structure?
the muscle that allows you to fully straighten your elbow
what is the tricep?
this is made when two or more elements combine to make a new substance
what is a compound?
because muscles can only exert force in one direction, they must work this way
what is in opposing pairs
every action has an equal and opposite reaction
what is Newton's third law?
the tough fibrous tissue that connects bones to each other
what is a ligament?
the term to describe the appearance of skeletal muscle
what is striated?
chemicals that speed up or affect reactions without actually being changed themselves
what is a catalyst?
this is what a moving object will do if there are balanced forces acting upon it
what is continue moving (at the same speed in the same direction)?