Properties of Matter
Anything that has mass and takes up space is known as what?
Matter
What is matter made of?
Smaller particles
Cutting a piece of paper is an example of what kind of change?
Physical
When substances interance and a new substance forms, what kind of change has occurred?
Chemical change
What is the scientific study of what matter is made of and how it changes?
Chemistry
What do we call characteristics that people use to describe and identify matter?
Propteries (i.e. color, hardness, magnetism, solubility
What important characteristic did we learn about many particles of matter?
They can be too small to be seen.
During a physical change, the total (blank) of matter is conserved.
Weight or mass
When a chemical change occurs, what happens to the total amount of matter?
It stays the same, matter is conserved.
Atoms
Describe Solubility
The ability of a substance to dissolve.
Give one example from this unit of matter whose particles are too small to be seen individually:
air, water vapor, dissolved sugar, dissolved salt
What are the three common states of matter we studied in this unit?
Solid, liquid, gas
Give one example of a chemical change.
cooking, baking, rusting, burning paper, rotting fruit, etc
An element
Color, hardness, reflectivity, electrical conductivity, thermal conductivity, magnetism, solubility
Blowing up a balloon can be used as a (Blank) to help show that invisible particles exist.
model
Describe a physical change in your own words.
Strong answer: Matter changes its shape, size, form, or state while remaining the same type of matter.
What observations can provide evidence that a chemical change occurred?
gas formation, color change, odor change, temperature change, light, formation of a precipitate
In an element, how are the atoms related?
They are atoms of the same type.
How can evidence be used to describe or identify matter?
Strong answer (get close): Scientists can observe or measure properties of matter and use those observations or measurements as evidence to distinguish one material from another.
Give one example of evidence supporting the claim that matter is made of particles too small to be seen.
Inflating a balloon, evaporating liquids, dissolving a substance
How could you gather evidence that the total weight of matter is conserved during a physical change?
Measure the weight before and after and compare the results.
Temperature change, emission of light, odor change, smoke emission
Describe a molecule.
Strong answer: A molecule consists of atoms joined together by chemical bonds.