Vocabulary 1
matter that is made up of more than one substance
mixture
things scientists make to answer questions about the real world
model
information that supports an answer to a question
evidence
Name at least two characteristics of a solid.
*Keeps its shape
*Molecules can't move past each other
*Molecules are VERY close together
*Takes the shape of its container
*Molecules can move past each other
*Molecules are close together
to pull an object without touching it
attract
the stuff things are made up of
matter
the tiniest piece of matter that is too small to be seen
atom
Name at least 2 characteristics of a gas.
*Takes the shape of its container
*Molecules move very quickly passed each other
*Molecules are very far apart
How can you determine the properties of a substance? Name as many ways as you can.
You can observe:
taste, smell, coloe, texture, size attraction to other molecules (dissolve vs. not dissolve), shape, mass, volume
a group of atoms joined together in a particular way
molecule
something that is made up of only one kind of molecule
substance
soluble
able to dissolve in water or another liquid
True or False
Different molecules have different properties
True
If a solid is dissolved in a liquid, what are some ways to prove it's still there, even though we can't see it?
*taste it
*weigh the substances separate and then together
*let the liquid evaporate and see what it left behind
a technique scientists use to separate mixtures into their parts
chromatography
what you can observe or measure about something that helps you identify or describe it
properties
What is the conservations of matter?
It is the rule that matter cannot be created or destroyed
Ex. 20 grams of water is mixed with 2 grams of sugar. The total mass of the mixture will equal 22 grams
How can we prove that gas is a type of matter?
It has mass (weight) and volume (takes up space)
Properties you canNOT see with your eyes are...
nanoscale properties
what is the difference between a mixture and a substance?
a mixture has more than one substance (or kind of molecule), but a substance is made up of only one kind of molecule
What is smaller: an atom or a molecule? How do you know?
an atom because a molecule is a group of atoms joined together
What does the word dissolve mean?
properties of matter
traits that can be observed, such as, color, melting point, smell, texture, shape, size, attraction to other molecules
What can we say about molecules' attraction to one another if the shape stays tightly together?
high attraction