8th
Grade
Science
STAARReporting Category 1
The __________ is the positively charged particle of the atom found in the nucleus.
The __________ is the neutrally charged particle of the atom found in the nucleus.
The___________ is the negatively charged particle of the atom found in the electron cloud.
8.5a R
Most the mass of an atom is in
the ___________.
Proton
Neutron
Electron
Nucleus
8.5b R
How many
valence electrons
does magnesium
have?______
Fluorine
have?______
Hydrogen
have?_____
Valence electrons determine an atoms _____________.
What is used to identify atoms?___________
Protons
2
7
1
Reactivity
8.5c R
1.2.
The Periodic Table of Elements organizes the elements according
to________________________________.
Period
Group
Atomic Number
The little number tells how many ________ of each element there is.
This little number is called a _________________.
8.5d R
This formula represents ____________.
Atoms
Subscript
Glucose
Physical Change affect only physical properties
such as size, shape, or phase.
___________________________________
Chemical change produces new substances with
new properties.
___________________________________
freezing, rusting, melting, evaporating, dissolving, boiling.
burning, and tarnishing 8.5e R
freezing, melting, evaporating, dissolving,
boiling
rusting, burning, and tarnishing
Law of Conservation of Mass
8.5f S
The mass of all reactants must ______ the mass of all
products; mass is neither created nor destroyed
Equal
Which layer has the
most food energy
available?_________
How much energy is
available from the
Producers to the
primary consumers?
__________
7.5c S
Producers
10%
Organic CompoundsA compound that contains organic _________
and other atoms - usually oxygen, hydrogen,
nitrogen, phosphorus, and/or sulfur.
Which of the following elements is found in all
organic compounds_____________
Organic compounds are biological(Made from living material).
7.6a S
Carbon
Carbon
Digestion
Chewing food is
_____type of change.
Acids in the stomach
breaking down the
food is _______ type
of change.
7.6b S
Physical
Chemical
__________ can not be broken down into
simpler substances.8
O15.9994
Oxygen
________ is a substance made up of two or more elements chemically combined.
H2O6.5c S
Elements
Compounds
_________ is the property of a metal that reflects light.
______ is the property of a metal that allows it to be shaped or
hammered.
________ is the property of a metal that allows
electricity to flow through it.
_______is the property of a nonmetal that allows things to break.
_______is the property of a nonmetal that allows things to
be dull.
6.6a S
Shiny Luster
Malleable
Conductor
Brittle
Dull Luster
Mass
Volume
6.6b S
Density
M
VD