Vocabulary 1
Amount of matter in a substance
Mass
Is air matter?
Yes. It takes up space
Burning of fire wood is an example of
a chemical change
The basic building blocks of everything
Atom
How much space an object takes up
Volume
Is it possible for an objects weight to change while its mass remains constant?
Yes, because of the gravitational force
What is a chemical property?
Rearranging parts on a toy is an example of
a physical change?
Made up of one or more of the same kind of atom chemically combined
Element
Weight
Which is more dense? Golf ball or Table-tennis ball
Golf ball
A change that changes only the appearance
What is a physical change?
Flammability is an example of
a chemical property
Made of different kinds of atoms chemically combined.
Compound
Anything that has mass and takes up space
Matter
Which is more dense? Empty carton of milk or a full carton of milk
What is a chemical change?
Color, bend-ability, hardness is an example of
a physical property
Contains a variety of elements and compounds that are not chemically combined with eachother
amount of matter in a certain volume of substance
Density
Why do astronauts weigh less on the moon than on Earth?
Because of the different gravitational pull
Matter cannot be created or destroyed, just transformed into another
What is the law of conservation of mass?
Suppose a log's mass is 5kg. After burning, the mass of the ash is 1 kg. What happened to the other 4kg?
It transformed into smoke.
What do elements, compounds, and mixtures have in common?
They are all made up of atoms.