WorksheetsLessons 1-3
Total questions: 15
Worksheet time: 22mins
Name
Class
Date
1.
To decide if a chemical reaction has happened, you should measure and compare which of the following?
a)
volume of the materials
b)
shape of the products
c)
properties of the substances
d)
mass of the reactants
2.
A student found 2 green powders that look the same. He wants to figure out if they are the same substance. Which of the following is the best method?
a)
Measure teh mass, volume, and temperature of each powder
b)
Combine both powders to find out if there is a chemical reaction
c)
Mixt the two properties together and then test the properties
d)
Determine the density, solubility, melting point of each powder and compare
3.
What does this model represent?
a)
a phase change
b)
a substance
c)
a chemical reaction
d)
a mixture
4.
A piece of copper is a substance because it..
a)
is made of the same type of atom throughout
b)
consists of many different types of atoms
c)
can be made into something different
d)
reacts with other substances
5.
A property is ...
a)
determined by the amount of substance
b)
made of one type of substance
c)
a process to make a new substance
d)
a characteristic of a substance
6.
If you have two substances A and B and they are both solids. Would you expect their melting points to be the same or different?
a)
the same because they are both solid at room temperature
b)
the same because they are made of teh same types of atoms
c)
different because they have different mass
d)
different because they are made of different molecules
7.
You have a solid yellow powder that dissolves in water when stirred into 100 mL of water. Predict what will happen when you stir it into 200mL of water.
a)
it will settle to the bottom and not dissolve
b)
it will float and then settle to the bottom and not dissolve
c)
it will float and not dissolve
d)
it will not settle but dissolve
8.
Which of the following is an example of a chemical reaction?
a)
mixing lemonade powder with water
b)
burning marshmallows over a fire
c)
melting butter in a pan
d)
boiling water on a stove
9.
A chemical reaction occurs when substances interact and their atoms ...
a)
disappear
b)
change their size
c)
become new atoms
d)
rearrange in a new way
10.
I know that solubility is a property because....
a)
It is true in water or oil
b)
It is only true when I have enough of a substance
c)
It is true of that substance if there is a little or a lot.
d)
It is true of more then one substance all the time.
11.
Which of the following is always true when a substance undergoes a phase change?
a)
a new substance will form that has new properties
b)
The substance becomes a liquid and heats up.
c)
The substance's melting point becomes lower
d)
The substance still has the same type of molecules
12.
A student is measuring the melting point of copper. He checks the thermometer and it starts at 35 degrees. He stirs the copper and waits until it is melted all the way through. He records the melting point at 89 degrees.
WHAT DO YOU THINK of his findings?
WHAT DO YOU THINK of his findings?
a)
He calculated the melting point accurately
b)
He made a mistake because he should have recorded the temperature when it started to melt.
c)
He made a mistake because it should have been 35 degrees.
d)
He should have used more than one substance, because now he has nothing to compare it to.
13.
Which of the following is not a property?
a)
mass
b)
solubility
c)
color
d)
melting point
14.
Which is a quantitative observation?
a)
The substance is orange
b)
The substance is soluble in oil
c)
The substance has a melting point of 75 degrees
d)
There are 5 grams of the substance
15.
What word makes the following statement false?
Properties are descriptions of substances that always change when you have different amounts of substances.
Properties are descriptions of substances that always change when you have different amounts of substances.
a)
descriptions
b)
always
c)
different
d)
substances
100 %
