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WorksheetsChapter 3-Study Guide
Total questions: 24
Worksheet time: 12mins
Name
Class
Date
1.
What is the ratio of hydrogen to oxygen in H2O?
a)
2:1
b)
1:2
c)
1:1
2.
What is the ratio of Carbon to Oxygen in CO2?
a)
1:2
b)
2:1
c)
1:1
3.
What is the ratio of carbon to hydrogen in C12H22O11?
a)
12:22
b)
22:12
c)
22:11
d)
11:22
4.
How is a mixture different from a compound?
a)
Mixtures are homogeneous or heterogeneous.
b)
Compounds can only have 2 or more elements combined.
c)
Mixtures are not chemically combined and compounds are.
d)
Molecules make up compounds.
5.
Bubbles, smoke, sound, color change, produce heat, produce light.
a)
All are signs of a physical change.
b)
All are chemical bonds.
c)
All are states of matter.
d)
All are signs of a chemical change.
6.
Which of the following is a sign of a physical property?
a)
Flamability
b)
Density
c)
React with oxygen
d)
Produces Light
7.
Which of the following is an example of a chemical property?
a)
Mass
b)
Hardness
c)
Weight
d)
Forms bubbles
8.
What is the difference between an atom and a molecule?
a)
Atoms are the smallest particle of an element.
b)
Compounds are made of molecules.
c)
Multiple atoms make up a compound.
d)
More than one atom joined together is a molecule.
9.
An endothermic reaction:
a)
absorbs energy
b)
is uncommon
c)
releases energy
d)
is done in a baggie
10.
An exothermic reaction
a)
releases energy
b)
is common
c)
uses water
d)
absorbs energy
11.
What type of change is changing the state of matter of a substance?
a)
physical change
b)
chemical change
12.
What type of change is changing producing a new substance?
a)
physical
b)
chemical
13.
Boiling point, condensing point, freezing point and melting point are all __________ properties.
a)
physical
b)
chemical
14.
You use the length, width, and height of a rectangular object when you want to find an objects _____________.
a)
mass
b)
weight
c)
volume
d)
density
15.
An example of a chemical symbol is.....
a)
Water
b)
Hydrogen
c)
CO3
d)
Na
16.
An example of a chemical formula is.....
a)
Water
b)
CO2
c)
Magnesium bromide
d)
He
17.
The Law of Conservation of Matter
a)
States that matter is never created or distroyed.
b)
Is only used in chemical changes.
c)
Is only used in physical changes.
d)
Is often broken.
18.
Anything that has mass and takes up space is called
a)
heterogeneous
b)
homogeneous
c)
matter
d)
density
19.
To find the density of an object you take......
a)
volume/mass
b)
mass/volume
c)
the weight of it
d)
L x W x H
20.
Atoms in a molecule are held together by....
a)
gravity
b)
physical bonds
c)
chemical bonds
d)
properties
21.
Fruit salad, dirt, and cereal & milk are all examples of
a)
elements
b)
compounds
c)
atoms
d)
mixtures
22.
A(n) __________ is formed when two or more substances are evenly mixed but no chemically bonded.
a)
compound
b)
mixture
c)
element
d)
atom
23.
The density of liquid water is 1.0 g/ml. If an unknown object has a density of 2.3 it will ......
a)
sink
b)
float
c)
dissolve
d)
undergo a physical change
24.
What type of reaction is represented by the graph?
a)
endothermic
b)
exothermic
c)
using a catalyst
d)
phase change
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