Type of matter
What are the states of matter?
Solid, liquid, gas
When a new substance is formed with different properties than the original substance it is called a
chemical change
What is the name of the phase change when water goes from a liquid to a solid?
Freezing
the temperature at which a liquid turns into a gas = ____ point
boiling
_____ is the movement of particles from an area of higher concentration to an area of lower concentration
diffusion
Which state of matter is a brick?
A solid
filling up a balloon with hot air is a _____ change
physical
when a thermal energy is increased in a solid, what change in state is happening?
melting
if the temperature of a substance is below the melting point, it will be a ____ form
solid
Diffusion is the movement of particles from a region of _____ concentration to a region of _____ concentration
higher, lower
What is the state of a milk?
A liquid.
Which change can be easily be reversed?
physical change
what cause water to evaporate?
Name of process when a liquid turn into a gas
condensation
when there is no difference in concentration, molecules _____ in all directions at the same rate
diffuse
Which state of matter takes the shape of its container?
a liquid
Which is an example of a physical change?
metal rusting, silver tarnishing, water boiling, and paper burning
water boiling
When thermal energy is decreased in a gas, what change in state is happening?
condensation
What word do we use when a liquid changes into a gas?
Evaporation
what is affected the substance to diffuse in a whole room?
high temperature
A liquid can change its _________.
shape easily
Which of the following is a common sign that a chemical change has occurred?
a) A chemical has changed size.
b) A chemical has changed to a different state (solid, liquid or gas)
c) A chemical has become a different shape.
d) A chemical has turned a different color.
d) A chemical has turned a different color.
What happens to the movement of the particles in a substance when the thermal energy is decreased?
slower
the higher pressure > the closer each particles > the volume ____
decreases
Explain why placing a teabag in hot water causes the tea to spread out and color the water faster than in cold water.
the tea in a teabag spread the concentration to the water