unit 1
are protons positive or negative
positive
How many atoms are needed for a chemical reaction
two or more
an object at rest stays at ______
Rest
what pressure system has clear skies and no storms
high pressure
what are the three parts of an atom
protons, neutrons, and electrons
would melting ice be a chemical or physical change
physical
The law of inertia applies to both moving and nonmoving objects. True or False
True
what pressure system has storms and wind and is very cloudy
low pressure
where are the Electrons located
the electron cloud
Is burning wood a physical or chemical change
chemical
The only way to slow down a moving object is to apply a force to it. True or False
True
what front is when a warm air mass and a cold air mass meet, but neither has enough force to move the other.
A stationary front
are electrons positive negative or neutral
negative
the substances that are reacting in a chemical reaction are called what
reactants
A stationary object has no forces acting on it. True or False
False
what front happens when two cold air masses trap a warm air mass and force it upward.
occluded front