Atoms and Molecules
This tiny particle is the basic building block of all matter.
Atom
This element, found in water, is the first on the periodic table
A. Helium
B. Oxygen
C. Hydrogen
D. Carbon
Hydrogen
Which of these is an example of a physical change?
A. Burning wood
B. Melting ice
C. Baking a cake
D. Rusting metal
Melting ice
Which of these is an example of a chemical change?
a) Melting ice
b) Freezing water
c) Burning paper
d) Crushing a can
Burning Paper
Which of the following correctly describes a molecule?
a) A molecule is a single atom.
b) A molecule is made up of one or more atoms bonded together.
c) A molecule is the smallest unit of an element.
d) A molecule can only be made of one type of atom.
A molecule is made up of one or more atoms bonded together.
This is formed when two or more atoms join together
Molecule
The symbol for gold on the periodic table
A. G
B. Au
C. Ag
D. Go
Au
A physical change is usually reversible. Which of these is a reversible physical change?
A. Breaking a glass
B. Boiling water
C. Cutting paper
D. Burning a candle
Boiling water
Which of the following is a sign that a chemical change has occurred?
a) A change in color
b) Water freezing into ice
c) A rock being broken into pieces
d) The temperature of a drink changing
A change in color
Which of the following elements is classified as a noble gas?
a) Nitrogen
b) Oxygen
c) Helium
d) Carbon
Helium
The periodic table is a chart that shows all of the _________
elements
The vertical columns on the periodic table are called this
A. Periods
B. Groups
C. Rows
D. Layers
Groups
A. Freezing
B. Condensation
C. Melting
D. Evaporation
Melting
When baking soda and vinegar mix, they create bubbles. This is an example of what?
a) A physical change
b) A chemical change
c) A reversible change
d) A color change
Chemical Change
In a covalent bond, atoms share this to form a molecule. What is shared?
a) Neutrons
b) Protons
c) Electrons
d) Ions
Electrons
This part of the atom has a positive charge and is found in the nucleus
Proton
The horizontal rows on the periodic table are called this
A. Families
B. Groups
C. Periods
D. Lines
Periods
Which of these shows a physical change in the appearance of an object?
A. Rust forming on iron
B. A pencil snapping in half
C. A fire turning wood into ash
D. A banana turning brown
A pencil snapping in half
A chemical change often involves the breaking or forming of this. What is it?
a) Water
b) Chemical bonds
c) Atoms
d) Molecules
Chemical Bonds
Which of the following is an example of a chemical change?
a) Crushing a rock
b) Dissolving sugar in water
c) Melting chocolate
d) Rust forming on iron
Rust forming on iron
When molecules in water move farther apart and form a gas, they turn into this
Steam or water vapor
This scientist is credited with creating the first periodic table
A. Albert Einstein
B. Isaac Newton
C. Dmitri Mendeleev
D. Marie Curie
Dmitri Mendeleev
Which statement is true about physical changes?
A. They create something new
B. They can only happen to liquids
C. They change how something looks or feels but not what it is
D. They always make heat
They change how something looks or feels but not what it is
When an apple turns brown after being cut, this is an example of what?
a) A physical change
b) A chemical change
c) A reversible change
d) A solid turning into a liquid
A chemical change
The atomic number of an element tells you the number of these in an atom. What are they?
a) Protons
b) Neutrons
c) Electrons
d) Nucleons
Protons