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WorksheetsREVIEW-Matter: Properties & Changes
Total questions: 20
Worksheet time: 20mins
Name
Class
Date
1.
Water (H2O) and table salt (NaCl) can be combined to form salt water. How can this combination be classified?
a)
As a compound because the water and table salt are chemically combined
b)
As a compound because the water and table salt form a new pure substance
c)
As a mixture because the water can be evaporated and physically separated from the table salt
2.
Which best describes an element?
a)
It is the simplest form of matter
b)
It can be changed into a compound
c)
It can be broken down into simpler mixtures
d)
It is composed of more than one type of atom
3.
A group of science students used water, filter paper and a hot plate to separate a mixture of salt and sand. Which of the following did the students most likely do first?
a)
Shake the mixture until the sand settles on the bottom
b)
Pour the mixture through the filter paper
c)
Heat the mixture on the hot plate
d)
Dissolve the salt by adding water to the mixture
4.
Hydrogen peroxide has one more oxygen atom than the compound water. What is the result of this extra oxygen atom?
a)
It makes peroxide more soluble than water
b)
It makes peroxide more carbonated than water
c)
It changes most of the properties of the compound
5.
The smallest part of an element that retains the properties of the element is the
a)
proton
b)
nucleus
c)
electron
d)
atom
6.
How many elements are in the compound sulfuric acid, H2SO4?
a)
1
b)
2
c)
3
7.
Which two elements make up household ammonia, NH3?
a)
Neon and helium
b)
Neon and hydrogen
c)
Nitrogen and helium
d)
Nitrogen and hydrogen
8.
When potassium and bromine atoms form chemical bonds, which of these is produced?
a)
An element
b)
A mixture
c)
A compound
d)
A new form of matter
9.
What do the atomic numbers represent?
a)
Number of atoms
b)
Number of protons
c)
Number of neutrons
10.
Which best explains how elements are arranged on the modern periodic table?
a)
Elements are arranged from fewest protons to most protons
b)
Elements are arranged from most protons to fewest protons
c)
Elements are arranged from fewest neutrons to most neutrons
11.
Which property is unique for each element?
a)
Atomic number
b)
Mass number
c)
State of matter
12.
What best describes the reactivity of alkali metals?
a)
Reactivity increases left to right across a period
b)
Reactivity decreases left to right across a period
c)
Reactivity increases down a group
13.
Which action results in a chemical change?
a)
Apples being cut into slices
b)
Wood burning in a fireplace
c)
Wet clothes drying on a clothesline
d)
Snow being shoveled off of a sidewalk
14.
What changes when gases condense to form liquids?
a)
Physical mass
b)
Physical state
c)
Chemical reactivity
d)
Chemical composition
15.
Which best represents a physical property of a substance?
a)
Acids act as a corrosive to metal
b)
Gold has a density of 19.3 g/cm3
c)
Sodium combines with chlorine to create sodium chloride
d)
Hydrochloric acid reacts with zinc metal creating hydrogen gas
16.
Which is the best evidence that a chemical change in matter has occurred?
a)
A solid melts
b)
A gas is produced
c)
Matter is destroyed during a chemical reaction
17.
Which term describes the relationship between the mass and volume of a substance?
a)
Density
b)
Solubility
c)
Specific heat
d)
Melting point
18.
Which of these is not an example of a physical change?
a)
Boiling
b)
Stirring
c)
Freezing
d)
Evaporating
19.
A sea creature releases a liquid into the ocean that reacts with the water to form a seashell. Which process does this represent?
a)
Freezing
b)
Gas formation
c)
Change of state
d)
Precipitate formation
20.
A student kept a notebook during an investigation. Which recorded observation was most likely a physical change?
a)
The solution was heated for two minutes until it boiled
b)
A solid formed when two liquids were mixed together
c)
Two solutions were mixed and the resulting solution felt hot
d)
The color of two mixed solutions changed from clear to white
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