April 5th test-Grade3 Flashcards
anything that has mass and takes up space
matter
the amount of matter that something contains
mass
something that describes matter
property
a property that can be observed by the senses, such as touch and sight
physical property
a property that describes how matter can change into another kind of matter
chemical property
a change in size, state of matter, or shape
physical change
a change in matter in which a new kind of matter is formed
chemical change
the ability to cause a change in matter
energy
energy of motion of tiny particles
heat
a form of energy that you can see
light
a property of blocking light
opaque
something that makes a task easier to do
machine
a push or a pull
force
a force that pulls objects toward each other. The size of this force depends on the size of the object
gravity
a device that changes the size and direction of a force
simple machine
a wheel around which a rope or chain is passed
pulley
two wheels that turn together (a simple machine)
wheel and axle
a simple machine made of a bar that turns around a fixed point.
lever
a fixed point around which a lever turns
fulcrum
attracts objects made of steel or iron, like nails or paper clips
magnets
what part of the body exchanges carbon dioxide (that your body can’t use) for oxygen that it needs?
lungs
what is our largest organ and helps to protect our internal organs?
skin
