Worksheetsuntitled
Total questions: 25
Worksheet time: 15mins
Name
Class
Date
1.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
MgO
c)
Mg and MgO
d)
O and MgO
2.
What is the definition of a chemical change?
a)
Characteristics that describe how a substance behaves under different conditions
b)
Alteration in the physical state of matter without changing its chemical composition
c)
Transformation that results in the creation of new substances
d)
Inherent characteristics that help us identify and describe matter
3.
Which of the following is a chemical property?
a)
odor
b)
flammability
c)
boiling point
d)
conductivity
4.
Which of the following is a physical property?
a)
Ability to react with oxygen
b)
Ability to rust
c)
Ability to burn
d)
Ability to conduct electricity
5.
What type of properties can be observed or measured without changing the substance's chemical composition?
a)
Both physical and chemical properties
b)
Physical properties
c)
Neither physical nor chemical properties
d)
Chemical properties
6.
Which of the following is an example of a chemical property?
a)
Melting point
b)
Density
c)
Color
d)
Ability to react with acid
7.
What is the definition of physical changes?
a)
changes that describe how a substance behaves under different conditions
b)
characteristics that describe how a substance interacts with other substances
c)
changes that alter the form or appearance of a substance, but not its chemical composition
d)
changes that lead to the formation of new substances with different chemical properties
8.
What is the definition of a physical change?
a)
Alteration in the physical state of matter without changing its chemical composition
b)
Inherent characteristics that help us identify and describe matter
c)
Characteristics that describe how a substance behaves under different conditions
d)
Transformation that results in the creation of new substances
9.
What type of change occurs when a substance reacts with an acid?
a)
physical change
b)
neither physical nor chemical change
c)
chemical change
d)
both physical and chemical change
10.
What happens to the fundamental particles during a physical change?
a)
They remain the same
b)
They break and form new chemical bonds
c)
They become completely different substances
d)
They disappear
11.
What is the definition of chemical changes?
a)
changes that lead to the formation of new substances with different chemical properties
b)
characteristics that describe how a substance interacts with other substances
c)
changes that describe how a substance behaves under different conditions
d)
changes that alter the form or appearance of a substance, but not its chemical composition
12.
Which of the following is an example of a physical change?
a)
rusting iron
b)
burning wood
c)
melting ice
d)
cooking an egg
13.
Which of the following is an example of a physical change?
a)
Burning wood
b)
Cooking an egg
c)
Melting ice
d)
Rusting iron
14.
Which of the following is an example of a physical property?
a)
Ability to rust
b)
Ability to burn
c)
Ability to conduct electricity
d)
Ability to react with oxygen
15.
What happens to the fundamental particles during a chemical change?
a)
They remain the same
b)
They break and form new chemical bonds
c)
They become completely different substances
d)
They disappear
16.
What is the right part of a chemical equation called...
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
17.
What is the left part of a chemical equation called?
2H2 + O2 --> 2H2O
2H2 + O2 --> 2H2O
a)
Reactants
b)
Products
c)
Yields
d)
Chemical Equation
18.
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.
19.
What is the little number after an element in a chemical equation called.
Example: H2
Example: H2
a)
Coefficient
b)
Subscript
c)
Atom
d)
Equation
20.
In the equation, 2Mg + O2 ---> 2MgO, which are the reactants?
a)
Mg and O
b)
Mg and MgO
c)
MgO
d)
O and MgO
21.
What are the larger numbers that you CAN CHANGE in a chemical equation?
a)
Coefficient
b)
Products
c)
Reactants
d)
Subscripts
22.
What are the smaller numbers that you CANNOT change in a chemical equation?
a)
Coefficient
b)
Products
c)
Reactants
d)
Subscript
23.
What is the Law of Conservation of Mass?
a)
It states that no matter can be created or destroyed.
b)
It states that no energy can be created or destroyed.
c)
It states that matter can be created or destroyed.
d)
It states that no sound can be created or destroyed.
24.
What law governs the balancing of chemical equations?
a)
Law of Energy
b)
Law of Conservation of Matter/Mass
c)
Law of Gravity
d)
Law of Matter Movement
25.
What is a coefficient?
a)
The small number on the right of the chemical symbol.
b)
The large number in front of a chemical formula.
c)
The number in between the chemical symbols.
d)
The number behind a chemical formula.
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