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(5/4 - Tuesday) 8.P.1 - 8th Grade Science EOG Review

Total questions: 56

Worksheet time: 32mins

Name
Class
Date
1.
What are atoms?
a)
The basic building blocks of all matter
b)
One of the phases of matter
c)
They travel in energy
d)
They are radiated from the sun
2.

Which subatomic particle is inside the nucleus of an atom, determines the atom's identity, and has a positive charge?

a)

Proton

b)

Electron

c)

Neutron

3.

Which subatomic particle is inside the nucleus of an atom, acts like glue, and has no charge?

a)

Proton

b)

Electron

c)

Neutron

4.

Which subatomic particle travels outside of the nucleus of an atom, determines the atom's chemical properties, and has a negative charge?

a)

Proton

b)

Neutron

c)

Electron

5.
Does an atom take up space and have mass?
a)
Yes
b)
No
6.
How many kinds of atoms are elements composed of?
a)
1
b)
2
c)
Hundreds
d)
Trillions
7.

When two or more types of atoms are combined chemically, they make what?

a)

Mixture

b)

Compound

c)

Solution

d)

Vapor

8.
When two or more different substances are physically combined, they form what?
a)
Compound
b)
Mixture
c)
Solution
d)
Vapor
9.
In a heterogeneous mixtures, particles are easily seen.
a)
True
b)
False
10.
What type of mixture is it difficult to separate and to view the individual substances?
a)
Heterogeneous
b)
Homogeneous
c)
Heterozygous
d)
Homozygous
11.
What are the three states of matter?
a)
Vapor, Liquid, Steam
b)
Liquid, Ice, Solid
c)
Solid, Liquid, Gas
12.
In a solid, the molecules?
a)
Move freely
b)
Do not move
c)
Move slightly
13.
In a liquid, the molecules?
a)
Do not move
b)
Will fill the shape of a container
14.
In a gas, the molecules?
a)
Do not move
b)
Move easily
15.

Who created the periodic table of elements?

a)

John Dalton

b)

Hennig Brand

c)

Antoine Lavoisier

d)

Dmitri Mendeleev

16.

An element is identified by

a)

its number of protons.

b)

the atomic mass.

c)

the type of charge.

d)

its number of isotopes.

17.

Each of the elements in the periodic table has a specific number. What does this number represent?

a)

the half-life

b)

the number of neutrons

c)

the number of protons

d)

the number of isotopes

18.

The number of protons and neutrons in the atom is its

a)

atomic mass.

b)

atomic number.

c)

atomic power.

d)

atomic clock.

19.

The element sodium appears like this in the periodic table. Which is its chemical symbol?

a)

11

b)

Na

c)

sodium

d)

22.990

20.

The chemical formula for baking soda is NaHCO3. How many different elements make up baking soda?

a)

1

b)

2

c)

3

d)

4

21.

How are elements ordered in the modern periodic table?

a)

by date of discovery

b)

by decreasing atomic mass

c)

by increasing atomic number

d)

by alphabetical order of element symbols

22.

The periodic table contains rows and columns. What are the horizon rows called?

a)

groups

b)

families

c)

columns

d)

periods

23.

How many periods does the periodic table contain?

a)

7

b)

8

c)

9

d)

10

24.

What are the columns of the periodic table called?

a)

periods

b)

rows

c)

tables

d)

groups or families

25.

How many groups does the periodic table contain?

a)

2

b)

3

c)

18

d)

32

26.

Properties such as magnetism, luster, and malleability have been used to group together which category of elements on the periodic table?

a)

metals

b)

nonmetals

c)

metaloids

d)

noble gases

27.

What general category describes the majority of the elements in the periodic chart?

a)

metals

b)

liquids

c)

nonmetals

d)

gases

28.

If a highly-reactive metal with one valence electron is discovered, in which group would the element best fit?

a)

group 1

b)

group 2

c)

group 17

d)

group 18

29.

Electrons located in an atom's outer most electron shell.

a)

electrolysis

b)

valence electrons

c)

electronics

d)

election

30.

Which statement best explains how periods on the periodic table are organized?

a)

increasing atomic number from left to right

b)

increasing number of neutrons from left to right

c)

decreasing number of electrons from left to right

d)

decreasing atomic mass number from left to right

31.

In which groups did Mendeleev most likely place highly-reactive elements?

a)

group 1 (IA) and group 17 (VIIA)

b)

group 1 (IA) and group 18 (VIIIA)

c)

group 2 (IIA) and group 18 (VIIIA)

32.

Which best explains how the periodic table is used to identify properties of elements?

a)

by the color and shape of the elements

b)

by the number of electrons in the elements

c)

by the group in which the elements are located

33.

An engineer needs a hard, non-magnetic semiconductor. Which element would best fit this description?

a)

aluminum (Al)

b)

carbon (C)

c)

silicon (Si)

d)

silver (Ag)

34.

Why does reactivity in non-metals most likely increase from left to right in the periodic table?

a)

atomic radius increases

b)

attraction for electrons increase

c)

attraction for electrons decreases

35.
What kind of properties can only be observed when a substance changes into a different substance?
a)
physical properties
b)
chemical properties
c)
liquid properties
d)
real properties
36.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
37.
Is hammering wood together to build a house a chemical or physical change?
a)
chemical
b)
physical
38.
Is bleaching your hair a physical or chemical change?
a)
physical
b)
chemical
39.
A change in the size, shape, or state of matter.
a)
chemical change
b)
physical change
c)
chemical reaction
d)
electron change
40.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
sour milk
41.
Kim puts an ice cube in a beaker and it melts. This is a good example of:
a)
a physical change.
b)
a chemical change.
c)
an experiment.
d)
an analysis.
42.
Photosynthesis is an example of a
a)
physical change
b)
chemical change
43.
Which is a physical change?
a)
burning match 
b)
vinegar in baking soda 
c)
melting butter
d)
cooking an egg
44.
What is an example of a Chemical change?
a)
Ripped paper 
b)
boiled egg
c)
cracked egg
d)
sugar in water
45.
Which of the following is a chemical property of water?
a)
Reacts with pure sodium.
b)
Boils at 100 oC.
c)
Dissolves sugar easily. 
d)
Has a density of 1 gm/mL
46.
Which of the following is NOT a physical property?
a)
breaking a window
b)
color
c)
denisty
d)
freezing point
47.
Which is a chemical change?
a)
freezing fruit juice
b)
slicing a potato
c)
boiling water
d)
copper metal turning green
48.
One cup of water is left outside for two days when it was checked there was only half a cup left. What happened?
a)
evaporation; chemical change
b)
condensation; physical change 
c)
evaporation; physical change
d)
condensation; chemical change
49.
How does a balanced chemical equation satisfy the Law of Conservation of Mass?
a)
During a chemical reaction, the total amount of matter stays the same.
b)
During a chemical reaction, matter is destroyed.
c)
During a chemical reaction, one or more new substances are formed.
d)
During a chemical reaction, the total number of atoms increases.
50.
Which is best represented by the equation?
2Mg + O2 → 2MgO
a)
Law of Conservation of Energy
b)
Law of Conservation of Mass
c)
Law of Superposition
51.
What is the importance of a closed container in a chemical reaction?
a)
to observe the mass before and after the reaction occurs
b)
to keep any materials from interfering with the reaction
c)
to observe the loss of mass after the reaction occurs
52.
Which best represents a balanced equation?
a)
120 grams of carbon plus 20 grams of oxygen → 200 grams of carbondioxide
b)
120 grams of carbon plus 50 grams of oxygen → 200 grams of carbondioxide
c)
120 grams of carbon plus 80 grams of oxygen → 200 grams of carbondioxide
53.

A chemical reaction occurs in a sealed test tube. As the results of the reaction 24 grams of product are produced. Which is most likely true?

a)

The mass of the reactants was 24 grams

b)

The mass of the reactants was less than 24 grams

c)

The mass of the reactants was more than 24 grams

54.

Which chemical equation correctly demonstrates the conservation of mass?

a)

KClO3 ---> KCl + O2

b)

H2O +CO2 -----> H2CO3

c)

Mg + HCl ----> H2 = MgCl2

55.

When vinegar and baking soda are combined, a mixture is produced, and gas is released. Which statement is true?

a)

The mass of the gas is equal to the mass of the vinegar and baking soda

b)

The mass of the mixture and gas is equal to the mass of the vinegar and baking soda

c)

The mass of the mixture and gas is greater than the mass of the baking soda and vinegar

56.
The number to the lower side of an element is a 
a)
Subscript
b)
Superscript
c)
Coefficient
d)
Charge

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