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PGA STAAR SCIENCE CAMP Cateory 1 Matter

Total questions: 75

Worksheet time: 3hrs 50mins

Name
Class
Date
1.

Which best describes the particles that make up the part labeled X in the model?

a)

They all have no charge

b)

They all have a positive charge

c)

Some have a positive charge and some have no charge

d)

Some have a positive charge and some have a negative charge

2.

The drawing above shows a model of an atom. Which object in the diagram has a negative charge?

a)

Particle A

b)

Particle B

c)

Particle C

d)

Particle D

3.

Which statement best describes a proton?

a)

Its mass is similar to that of an electron, but it has a positive charge

b)

Its mass is similar to that of a neutron, but it has no charge

c)

Its mass is similar to that of a neutron, but it has a positive charge

d)

Its mass is much smaller than that of a neutron, but it has a negative charge

4.

A neutral atom has 16 electrons. How many protons does it have?

a)

32

b)

8

c)

16

d)

0

5.

The chart above shows the numbers of each kind of subatomic particles in an atom. Which number describes the charge of this atom's nucleus?

a)

-53

b)

-74

c)

+53

d)

+21

6.

A student organized data describing the particles that make up atoms in the table above. Which value should the student write in the empty box?

a)

-1

b)

1

c)

1/1836

d)

2

7.
8.5A Which of the following best describes an electron?
a)
It has no charge & about the same mass as a proton.
b)
It has a negative charge & much less mass than a proton.
c)
It has a positive charge & much more mass thtan a neutron.
d)
It has a negative charge & about the same mass as a neutron.
8.
8.5B
a)
Boron (B)
b)
Carbon (C)
c)
Neon (Ne)
d)
Sodium (Na)
9.
8.5B
a)
The total number of neutrons in the unknown element.
b)
The total number of particles in the nucleus of the unknown element.
c)
The number of protons in the nucleus of the unknown element.
d)
The number of valance electrons in the unknown element.
10.
8.5B How many protons are in Beryllium?
a)
4
b)
9
c)
5
d)
2
11.

Which value is most likely the number of protons for saturntonium?

a)

388

b)

219

c)

169

d)

171

12.

Which statement is a valid conclusion based on the information?

a)

Saturntonium is nonreactive

b)

Saturntonium has properties unlike any other element

c)

Saturntonium is very reactive

d)

Saturntonium has properties most similar to period 7 metals

13.

Which model represents the most reactive atom?

a)
b)
c)
d)
14.

Which of the following characteristics is similar for fluorine and iodine?

a)

Number of protons

b)

Number of neutrons

c)

Number of orbitals

d)

Number of valence electrons

15.

The atomic number of an element is equal to its number of protons. Therefore, a logical conclusion is that the number of protons determines an element's

a)

Mass and atomic weight

b)

Number of stable isotopes

c)

Identity

d)

State of matter

16.

The atomic number of an element is equal to its number of protons. Therefore, a logical conclusion is that the number of protons determines an element's

a)

Mass and atomic weight

b)

Number of stable isotopes

c)

Identity

d)

State of matter

17.

Which statement is NOT accurate describing the element krypton?

a)

The element has 36 protons

b)

The element has 48 neutrons

c)

The element has 6 valence electrons

d)

The element has properties similar to neon

18.

Where are valence electrons located on the model?

a)

Near the nucleus

b)

In the middle of the atom

c)

At the innermost level

d)

At the outermost level

19.

Based on the information, what is the identity of this atom?

a)

Fluorine (F)

b)

Cobalt (Co)

c)

Germanium (Ge)

d)

Nickel (Ni)

20.

A student is studying calcium, a highly reactive element that humans need for strong bones. Which characteristics of calcium is most closely related to its chemical reactivity?

a)

The 20 protons in each atom of calcium

b)

The density of calcium

c)

The atomic number

d)

The two valence electrons in each atom of calcium

21.

What groups are the most reactive metals?

a)

2 and 3

b)

1 and 18

c)

1 and 2

d)

16 and 17

22.

What groups are the most reactive non metals?

a)

1 and 2

b)

16 and 17

c)

2 and 17

d)

1 and 16

23.
How many atoms of carbon (C) are in C6H12O6?
a)
3
b)
6
c)
12
d)
24
24.
Which of the following is a compound?
a)
Co
b)
O2
c)
C
d)
CO2
25.
Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)
a)
H3SO4
b)
HSO4
c)
H4S3O
d)
H2O
26.
The blue numbers in the image below represent ________
a)
I don't know, and don't want to try
b)
coefficients
c)
subscripts
d)
none of the answers are correct
27.
What is the name of the group that never reacts--ever ever they are stable with a full outermost ring!!!
a)
noble gases
b)
transition
c)
halogens
d)
borons
28.
How many elements are in C6H12O6?
a)
1
b)
2
c)
3
d)
4
29.
In which of these compounds are there twice as many oxygen atoms as hydrogen atoms?
a)
H3PO4
b)
H2SO4
c)
HCIO3
d)
H2O
30.
The chemical formula for sodium sulfate is Na2SO4. How many sulfur atoms are in the formula for sodium sulfate?
a)
1
b)
2
c)
6
d)
7
31.

Cu + 2AgNO3 2Ag + Cu(NO3)2

How many copper (Cu) atoms are there in 

Cu(NO3)2 ?

a)
1
b)
2
c)
5
d)
6
32.
Which of the following formulas contain the same number of oxygen atoms?I. Mg(NO)2II. NH4NO2III. Ca(ClO2)2IV. NaClO2V. Co(NO3)2
a)
Formulas I and II
b)
Formulas II and IV
c)
Formulas I, II, and III
d)
Formulas I, II, and IV
33.
Which two groups on the Periodic Table are the MOST reactive?
a)
Group 1 and Group 7A (17)
b)
Group 2 and Group 6A (16)
c)
Group 13 and Group 5A (15)
d)
Group 17 and Group 8A (18)
34.
Within a column the masses of the elements ___________ from top to bottom
a)
increases
b)
decreases
c)
there is no change
d)
is completely random
35.
In the modern periodic table elements are arranged by:
a)
atomic mass
b)
atomic number
c)
valence electrons
d)
number of isotopes
36.
Each column in the periodic table is called a 
a)
period
b)
group
c)
cluster
d)
unit
37.
most of the elements on the periodic table are 
a)
non metals 
b)
metals 
c)
metalloids 
d)
none 
38.
Each row in the periodic table is called a 
a)
group
b)
period
c)
cluster
d)
unit
39.
_________ are elements that are good conductors of electric current and heat
a)
noble gasses
b)
metalloids
c)
nonmetals
d)
metals
40.

Based on the data, which number shows the correct location of the element with 2 valence electrons and 3 energy levels.

a)

1

b)

2

c)

3

d)

4

41.

Based on the data, which number shows the correct location of the element with 2 valence electrons and 1 energy levels.

a)

1

b)

2

c)

3

d)

4

42.

Which statement best describes the position of the two elements in the periodic table.

a)

The two elements are in the same period, with Mg the first element in the period table and Ca the last element

b)

The two elements are in the same group, with Mg just above Ca

c)

The two elements are side by side in the same period, with Ca to the left of Mg

d)

The two elements are in the same group, with Ca just below Mg

43.

Which two atoms are elements in the same group in the periodic table?

a)

Atom 3 and Atom 4

b)

Atom 1 and Atom 4

c)

Atom 3 and Atom 2

d)

Atom 1 and Atom 2

44.
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
45.
Is burning wood a chemical or physical change?
a)
chemical
b)
physical
46.
Which of the following is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
shrunken clothing
d)
sour milk
47.
Four students performed four different investigations by combining different substances. Their results are shown in the table provided. In which experiment are new substances being formed?
a)
Experiment 1
b)
Experiment 2
c)
Experiment 3
d)
Experiment 4
48.
Which of the following is an example that includes evidence of a chemical reaction?
a)
A sample of zinc is placed in water and it settles to the bottom
b)
A solid block of ice is heated and it completely melts into a liquid. 
c)
Sugar that is burned gives off an odor and turns brown and then black.
d)
A tomato is placed into a blender and chopped up into smaller pieces.
49.
A student mixes two clear liquids together. After a few minutes, a white powdery solid can be seen settling on the bottom of the test tube. Which of the following is a conclusion that the student can draw based on these observations? The two clear liquids –
a)
were pure substances before they were mixed.
b)
are toxic and should be handled with extreme caution.
c)
have gone through a chemical change in which a new substance called a precipitate was produced.
d)
have been stored too long and are no longer good.
50.
8.5E
a)
Substance 1
b)
Substance 2
c)
Substance 3
d)
Substance 4
51.
8.5E
a)
One of the original compounds came out of solution.
b)
The solutions reacted chemically.
c)
Some of the water froze into ice crystals.
d)
Rapid evaporation of water occurred, leaving a solid.
52.
8.5E Which is evidence of a chemical reaction?
a)
The baking soda & hydrochloric acid combined, & bubbles formed
b)
The baking soda absorbed the hydrochloric acid.
c)
Some of the baking soda dissolved in the hydrochloric acid.
d)
The hydrochloric acid evaporated, leaving only the baking soda.
53.
8.5F Which problem is balanced?
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
54.

What is the best explanation for what the arrows in a food chain represent?

a)

The arrows demonstrate in which direction the animal or plant is moving

b)

The arrows demonstrate the order in which a plant or animal consumes food

c)

The arrows demonstrate how much each animal eats

d)

The arrows demonstrate the flow of energy through the food chain

55.

A group of science students went on a hike around the campus to investigate how energy flows through an ecosystem. Which level of the food chain would the students encounter most often?

a)

Primary consumers

b)

Tertiary consumers

c)

Producers

d)

Secondary consumers

56.

How much of the sun's original energy is received by organisms at position Y in the energy pyramid?

a)

100%

b)

10%

c)

1%

d)

0.1%

57.

In the food web, which animals are considered secondary consumers?

a)

Minnow and snail

b)

Minnow and bass

c)

Duck and snail

d)

Duck and bass

58.

According to the desert food web, which organism receives the greatest amount of the sun's energy taken in by the desert plants?

a)

Snake

b)

Scorpion

c)

Small lizard

d)

Hawk

59.

According to the desert food web, which organism receives the greatest amount of the sun's energy taken in by the desert plants?

a)

Snake

b)

Scorpion

c)

Small lizard

d)

Hawk

60.

Which organism provides energy to the greatest number of organisms in the food web?

a)

Grasses

b)

Insects

c)

Mouse

d)

Rabbit

61.
Where on the periodic table are the metalloids found?
a)
Right Side
b)
Along the Zig Zag Line
c)
Right Side
62.
Where on the periodic table are most of the metals found?
a)
Right Side
b)
Along the Zig Zag Line
c)
Left Side
63.
Where on the periodic table are most of the nonmetals found?
a)
Right Side
b)
Along the Zig Zag Line
c)
Left Side
64.
Elements arranged in vertical columns in the periodic table are called periods.
a)
true
b)
false
65.
Malleability is ___________
a)
the way light is reflected off a surface.
b)
how well a piece of matter conducts electricity
c)
A.  the capability of being drawn out into thin wires or threads.
d)
the capability of being hammered out thin.
66.
Luster is ___________
a)
A.  the way light is reflected off a surface.
b)
A.  how well a piece of matter conducts electricity. 
c)
A.  the capability of being drawn out into thin wires or threads.
d)
A.  the capability of being hammered out thin.
67.
Density is 
a)
weight/volume
b)
mass/volume
c)
weight/mass
d)
volume/mass
68.
Metals have all of the following physical properties except __________.
a)
high conductivity
b)
shiny luster
c)
malleable
d)
brittle
69.
Nonmetals are ________ compared to metals.
a)
highly conductive
b)
brittle
c)
ductile
d)
non-conductive
70.

What is the density of an object that has a mass of 15 g and a volume of 2.5 cm3?

a)

37.5 g/cm3

b)

6.0 g/cm3

c)

12.5 g/cm3

d)

0.17 g/cm3

71.

What is the density of an object that has a mass of 15 g and a volume of 2.5 cm3?

a)

37.5 g/cm3

b)

6.0 g/cm3

c)

12.5 g/cm3

d)

0.17 g/cm3

72.

A student finds that the mass of an unknown object is 28.9 grams and the volume is 12.3 cm3. Which object did the student measure?

a)

Water

b)

Rock

c)

Air

d)

Glass

73.

The density values of four irregular shaped objects are shown in the table. Which object's density can be calculated from measurements of 18.8 mL and 17.5 grams?

a)

Plastic dinosaur

b)

Pink eraser

c)

Large paper clip

d)

Aluminum foil ball

74.

The density values of four irregular shaped objects are shown in the table. Which object's density can be calculated from measurements of 18.8 mL and 17.5 grams?

a)

Plastic dinosaur

b)

Pink eraser

c)

Large paper clip

d)

Aluminum foil ball

75.

A student calculates the density of an unknown metal sample to be 8.25 g/cm3. Which set of data from the student's notebook correctly calculates the density of the unknown metal sample?

a)

Mass = 82.5 g, Volume = 11.0 cm3

b)

Mass = 198.0 g, Volume = 24.0 cm3

c)

Mass = 165.2 g, Volume = 21.2 cm3

d)

Mass = 202.5 g, Volume = 25.0 cm3

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