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