Exams

Question 1

Properties

Answer 1

properties are characteristics that we use to describe different types of matter

Question 2

Physical properties

Answer 2

a characteristic of a substance that can be observed without changing the substance into another substance.

ex.
density
melting point
boiling point

Question 3

Chemical properties

Answer 3

is a characteristic of a substance that can only be observed by changing it into a different substance or during a chemical reaction.

ex.
The ability to burn
Ability to tarnish
Ability to rust
Ability to decompose
Ability to react with other chemicals

Question 4

Atom

Answer 4

The smallest piece of an element

Elements are different types of atoms and have unique masses and sizes

Question 5

Molecule

Answer 5

When two or more atoms bond, they form a molecule.

Question 6

Compound

Answer 6

Substance formed by the combining of two or more different elements

(a chemical formula describes what types and how many atoms make up the compound)

Question 7

Mixture

Answer 7

A mixture is when 2 or more substances combined but don’t react to form something new

Question 8

What does scale measure?

Answer 8

A scale measures the mass of an object in grams.

Question 9

Mass

Answer 9

the amount of matter ano object