State of matter changes
phase change for solid to liquid is called?
Melting
Give an example of a solid, liquid and a gas
ice, water, vapor
Give an example of a physical change
water to ice
give an example of a force
push or pull
Friction gives out unecessary _________ and _________
heat, Noise
Phase change of liquid to gas is called?
Boiling or evaporation
give an example of something that can dissolve in water
salt, sugar
give an example of a chemical change
burning wood
which direction does friction go relative to a force? for example if a car is moving to the right, which way is friction?
the opposite way, right
Friction allows us to _______________ objects
hold
phase change of liquid to solid is called
freezing
dry ice is an example of what phase change?
sublimation
which change, physical or chemical, often makes a new substance?
chemical
What tool do we use to measure force?
Spring Balance
give a positive and negative for friction
positive: allows us to move
negative: wears out surfaces
Phase change of gas to solid is called?
Deposition
explain what happens when we add baking soda to vinegar, is it a chemical or physical change?
the substances react creating foam, chemical
which change is always irreversible?
Chemical
define resultant force
the summation of all the forces acting on an object
define the magnitude, in relation for forces
magnitude is the size of a force or how long an arrow is on a diagram. for example a big magnitude force is a large force.
what is the phase change called that is a solid to a gas?
sublimination
what is the name of the process when iron or metal oxidizes and turns green or brown?
rust
Give an example of an irreversible change for both physical and chemical
cutting wood, burning the wood
which has greater friction, sandpaper or glass? why?
sandpaper because it is rougher
What does the word stationary mean?
not moving