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WorksheetsQuarter 2 Science Review
Total questions: 60
Worksheet time: 36mins
Name
Class
Date
1.
Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture.
Apple juice
Apple juice
a)
Heterogeneous mixture
b)
Compound
c)
Element
d)
Homogeneous mixture
2.
Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture.
Water
Water
a)
Element
b)
Compound
c)
Heterogeneous mixture
d)
Homogeneous mixture
3.
Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture.
Trail Mix
Trail Mix
a)
Element
b)
Compound
c)
Heterogeneous mixture
d)
Homogeneous mixture
4.
Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture.
Hydrogen
Hydrogen
a)
Element
b)
Compound
c)
Heterogeneous mixture
d)
Heterogeneous mixture
5.
Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture.
Milk
Milk
a)
Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture.
Element
Element
b)
Compound
c)
Heterogeneous mixture
d)
Homogeneous mixture
6.
Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture.
Salt
Salt
a)
Element
b)
Compound
c)
Heterogeneous mixture
d)
Homogeneous mixture
7.
Classify the following as an element, compound, homogeneous mixture, or heterogeneous mixture.
Salad
Salad
a)
Element
b)
Compound
c)
Heterogeneous mixture
d)
Homogeneous mixture
8.
a)
Element
b)
Compound
c)
Mixture of elements
d)
Mixture of elements and compounds
9.
a)
Element
b)
Compound
c)
Mixture of elements
d)
Mixture of elements and compounds
10.
a)
Element
b)
Compounds
c)
Mixture of elements
d)
Mixture of compounds
11.
a)
Element
b)
Compound
c)
Mixture of elements
d)
Mixture of compounds
12.
a)
Element
b)
Compound
c)
Mixture of elements
d)
Mixture of elements and compound
13.
Combination of protons and neutrons in the atom. Average mass of all versions of element.
a)
atomic number
b)
atomic mass
c)
symbol
14.
Which reflects the number of protons in an element?
a)
atomic number
b)
atomic mass
c)
symbol
15.
Negatively charged particle of the atom that orbits the nucleus
a)
Proton
b)
Neutron
c)
Electron
16.
A pure substance that cannot be broken down further; it is made of one type of atom and represented on the Periodic Table.
a)
compound
b)
mixture
c)
element
17.
An element with physical properties such as being shiny, malleable, ductile, and conducts heat and electricity.
a)
metal
b)
nonmetal
c)
metalloid
18.
An element with some characteristics of both metals and nonmetals
a)
metal
b)
metalloids
c)
nonmetal
19.
Neutrally charged particle inside the nucleus. It add mass and stability to the atom.
a)
proton
b)
neutron
c)
electron
20.
An element that lacks the properties of a metal. It is brittle, dull (little or no luster), and poor conductor of heat and electricity.
a)
metal
b)
metalloid
c)
nonmetal
21.
Chart of over 100 elements which shows repeating properties.
a)
Dictionary
b)
Moh's scale
c)
Periodic table
22.
Positively charged particle inside the nucleus
a)
proton
b)
neutron
c)
electron
23.
Ease and speed with which an element can combine with other elements and compounds
a)
reactivity
b)
restlessness
24.
Subatomic particles include
a)
compounds, elements, mixtures
b)
arteries, capillaries, veins
c)
protons, neutrons, electrons
d)
Curly, Moh, quark
25.
The densities of the following liquids are .8, .92, 1.0, & 1.33.
What could substance B's density possibly be?
What could substance B's density possibly be?
a)
.8
b)
.92
c)
1.0
d)
1.33
26.
Which statement best describes the density of the cork?
a)
The density of the cork is between that of Liquid A and Liquid B.
b)
The density of the cork is greater than the density of Liquid C.
c)
The density of the cork is between that of Liquid B and Liquid C.
d)
The density of the cork is less than the density of Liquid B.
27.
What would happen if the density of the liquid in the beaker increases to 2.33 g/mL?
a)
The ball will remain at the bottom of the beaker.
b)
The ball will move to the middle of the liquid in the beaker.
c)
The ball will rise slowly, then sink to the bottom of the beaker.
d)
The ball will float on top of the liquid in the beaker.
28.
Different substances and their densities are listed in the table.
Which substances will float in salt water?
Which substances will float in salt water?
a)
ice and salt
b)
ice and corn oil
c)
salt and corn syrup
d)
corn oil and corn syrup
29.
Providing the melting point of a substance is an example of its _______.
a)
physical property
b)
chemical property
30.
Describing flammability (whether it will catch fire) of a substance is an example of a_______.
a)
physical property
b)
chemical property
31.
Knowing the density (example: water's density is 1.0 g/cm3 or g/mL) of a substance an example of a _______.
a)
physical property
b)
chemical property
32.
The ___ _____ of metals are described as ductile, malleable, and good conductors of electricity and heat.
a)
physical property
b)
chemical property
33.
Which is an example of a physical property?
a)
rusting
b)
boiling point
c)
combustion
d)
reacts with water to make hydrogen gas
34.
Physical properties are
a)
properties that can be observed without changing the identity of the substance
b)
properties that describe how a substance changes into a completely different substance
c)
properties that we can only observe with our eyes
d)
properties that we need special tools to observe
35.
Which of the following is a chemical property?
a)
the color of an object
b)
ability to explode
c)
ability to float in water
d)
size of an object
36.
Which of the following is a chemical property of water?
a)
reacts with pure sodium
b)
boils at 100 degrees Celsius
c)
is liquid at room temperature
d)
has a density of 1 gm/mL
37.
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
38.
Both of the following statements about oxygen (O2) are true. Which describes oxygen's chemical properties?
a)
clear, non-metallic gas
b)
reacts with heat and fuel to cause burning.
39.
Copper pennies turn green (tarnish) after a few years. This is an example of a
a)
physical change
b)
chemical change
c)
physical AND chemical change
40.
Melting butter on popcorn is an example of a
a)
physical change
b)
chemical change
c)
physical AND chemical change
41.
Salt can be mixed with water to make a gargle. This is an example of a
a)
physical change
b)
chemical change
c)
physical AND chemical change
42.
Green bananas turn yellow on their own as they ripen.
a)
physical change
b)
chemical change
c)
physical AND chemical change
43.
A burning candle is an example of: (think carefully)
a)
physical change
b)
chemical change
c)
physical AND chemical change
44.
Glass breaking is
a)
physical change
b)
chemical change
c)
physical AND chemical change
45.
Plants use carbon dioxide and water to make sugar during photosynthesis which is an example of a
a)
physical change
b)
chemical change
c)
physical AND chemical change
46.
Which is NOT an example of a physical change?
a)
crumpled paper
b)
pencil sharpening
c)
souring milk
d)
sliced bread
47.
In this image, the information in red is called the_______.
a)
Reactants
b)
Products
48.
In this image, the information to the right of the arrow (in black) is called the_______.
a)
Reactants
b)
Products
49.
What is the arrow in a chemical equation say to us as chemists...
H2 + O --> H2O
H2 + O --> H2O
a)
Reactants
b)
Products
c)
"Makes" or "Yields"
d)
Chemical Equation
50.
What does the Law of Conservation of Mass state?
a)
Matter cannot be gained or lost in a chemical reaction.
b)
Matter can only be lost in a chemical reaction.
c)
Matter can only be gained in a chemical reaction.
d)
Matter can be gained and lost in a chemical reaction.
51.
How many ELEMENTS are in the compound H2O
a)
1
b)
2
c)
3
d)
4
52.
How many ELEMENTS are in the compound O2
a)
1
b)
2
c)
3
d)
4
53.
How many ATOMS of Carbon are in 3C2H4O
a)
2
b)
3
c)
4
d)
6
54.
How many ATOMS of Oxygen are in 3Fe2O3
a)
2
b)
3
c)
6
d)
9
55.
How many TOTAL atoms are in 2H2SO4
a)
2
b)
4
c)
7
d)
14
56.
How many TOTAL atoms are in 2CaO2
a)
2
b)
3
c)
5
d)
6
57.
Is the following equation balanced or unbalanced ?
Al + O2 --> Al2O3
Al + O2 --> Al2O3
a)
Balanced
b)
Unbalanced
58.
Is the following equation balanced or unbalanced ?
N2 +3 H2 --> 2NH3
N2 +3 H2 --> 2NH3
a)
Balanced
b)
Unbalanced
59.
Which equation is balanced?
a)
2Al2O3 ---> 4Al + 3O2
b)
2Al2O3 ---> 2Al + 3O2
60.
How many atoms of lead (Pb) are in Pb(NO₃)₂?
a)
1
b)
2
c)
3
d)
6
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