matter
what is kinetic energy
energy in motion
which of the following is evidence of a chemical change
A: Change in shape
B: change in temperture
change in temperature
definition for the following
heterogenous mixture -
homogenous mixture -
heterogenous - The components are distributed unevenly, creating two or more distinct regions or phases.
homogenous - a combination of two or more substances that are blended so evenly that you cannot see the individual parts.
metalloids can not do what two things ?
- insulate
- malleable
less dense =
more dense =
- float
- sink
what are the three states if matter
solid
liquid
gas
definition for chemical change
A chemical change happens when one or more substances transform into entirely new substances with different properties
Two substances are mixed together, what is a form of evidence that a new substance did NOT form?
A- gas was produced
B- change in texture
C- thermal energy increased
D- color changed
change in texture
definition for the following word
malleable -
ductile -
- can be hammered or pressed into thin sheets
- can be stretched into a thin wire
For something to float on water, it needs to be ________ dense (or equal in density) compared to the water.
- less
-more
-less
molecules in a liquid have ________ kinetic energy than the molecules in gas?
- more
- less
less
what are some signs of a precipitate being formed?
cloudiness
color change
settling solids
floating particles
Mixing milk and white vinegar, the milk curdles and forms a chunky, cloudy white solid at the bottom.
because the outcome was a cloudy solid that settled at the bottom it is a -
precipitate
name two properties that are not properties of a metalloid ?
- insulator
- malleable
A substance with more particles packed within the same volume has higher density and will _________ in a fluid that is less dense than it.
-sink
-float
- sink
put the following in order from the least to most in terms of kinetic energy
gas, solid, liquid
solid
liquid
gas
A mixture containing a precipitate is a ____________ mixture because the solid particles separate from the liquid and are not uniform throughout.
heterogenous
a glass of orange juice is being poured into a class, once poured into the glass the pulp of the orange juice is sitting on the top of the juice.
what type of mixture is this?
heterogenous- the pulp is not evenly mixed with the juice.
scientists have an unknown gray solid item. It could either be classified as a metal or a non metal.
what could the scientist test to determine if the item is a metal or non metal ?
is the material in the item malleable or ductile
An object ___________ if its density is greater than the fluid it is placed in
- sinks
- floats
- sinks
How are the molecules in a solid different from the molecules in a liquid ?
the molecules in a solid have less kinetic energy than the molecules in a liquid
a boiling pot of coffee has high kinetic energy, what would be the best type of container to hold this substance
- open container
- closed container
- shoe box
A closed container
a picture is shown of substance going into water and later dissolving, because the substance is dissolved this mixture is
homogenous
what are four properties of a non metal
- dull
- does NOT conduct heat
- does NOT conduct electricity
- low melting point
you observe a glass of water with ice, why is the ice floating on the water surface and not at the bottom of the glass?
ice is less dense than the water