NEW
Font size
S
M
L
XL
WorksheetsMs. Brichler's Compounds and Mixtures Review
Total questions: 30
Worksheet time: 15mins
Name
Class
Date
1.
Which of these is NOT an example of a compound?
a)
Rust (Fe2O3)
b)
Water (H2O)
c)
Hydrogen (H)
d)
Salt (NaCl)
2.
How are chemical bonds formed?
a)
The nucleus of one atom combines with the nucleus of another atom.
b)
Electrons are transferred or shared between atoms.
c)
The atoms exchange protons with one another.
d)
The number of neutrons increases.
3.
The chemical formula for sugar (glucose) is C6H12O6, which term best defines C6H12O6?
a)
A compound
b)
An element
c)
An atom
d)
A mixture
4.
Although water is a pure substance, why would you NOT find water on the periodic table?
a)
Water is a liquid
b)
Water is a mixture
c)
Water is an element
d)
Water is a compound
5.
What is always created when an acid and a base combine?
a)
A salt
b)
An element
c)
A sugar
d)
A protein
6.
What is the pH scale?
a)
A measure of how acidic or basic a substance is.
b)
a scale to measure hardness.
c)
Something played by a musical instrument.
d)
A measurement of electrical conductivity.
7.
The pH scale ranges from 1 to 14, 1 being a very strong acid and 14 being a very strong base. Where would you find water in this continuum?
a)
Between 1 and 4
b)
Between 7 and 7.5
c)
Around 10 or 11
d)
At 14.
8.
Where would you find milk on the pH scale?
a)
6-6.5, slightly acidic
b)
7, neutral
c)
8-8.5, slightly basic
d)
12, quite a strong base
9.
Which of the following would be considered a base?
a)
Orange juice
b)
Lemon peels
c)
Vinegar
d)
Soap
10.
When an acidic substance such as our alkali metals are combined with a base a salt is produced. Which of the following is an example of a salt?
a)
Water (H2O)
b)
Potassium Chloride (KCl)
c)
Sodium Metal (Na)
d)
Oxygen (O)
11.
Litmus paper turns blue in bases. Which of the following would turn litmus paper blue?
a)
bleach
b)
lemon juice
c)
vinegar
d)
water
12.
Which substance is the strongest acid?
a)
Ocean water (7.9 pH)
b)
Bottled drinking water (6.9 pH)
c)
Rain Water (5.5 pH)
d)
Soapy water (8.5)
13.
Solutions are mixtures that are mixed so evenly throughout you can't see the different parts. Which of the following would be examples of solutions?
a)
salt water, tea, soft drinks
b)
water, chlorine, sugar
c)
tacos, salad, trail mix
d)
Lucky Charms cereal, fruit salad
14.
When you can easily see the different parts of a mixture and they are NOT evenly mixed, the mixture is _________________.
a)
homogeneous
b)
heterogeneous
c)
a pure substance
d)
an element
15.
When a mixture is evenly mixed throughout, it is said to be ____________________.
a)
homogeneous
b)
heterogeneous
c)
a suspension
d)
a compound
16.
The best way to separate a visible solid from a liquid would be to use a(n)_______________.
a)
beaker and a hot plate
b)
magnet
c)
filter in a funnel
d)
acid
17.
The best way to separate a liquid solution would be to use _____________________.
a)
a magnet
b)
a filter
c)
a beaker and a hot plate
d)
a tweezer
18.
If you have an unknown substance that you able to separate using a filter, it must be a(n) ___________.
a)
compound
b)
mixture
c)
element
d)
pure substance
19.
When conducting a scientific experiment, how many independent variables can you have?
a)
two
b)
as many as you can keep track of
c)
one
d)
zero
20.
True or False? In a good scientific experiment, the outcome needs to be controlled?
a)
True
b)
False
21.
In a good scientific experiment, the ___________________ is the one thing we measure.
a)
Independent variable
b)
dependent variable
c)
control group
d)
test group
22.
In a good scientific experiment, the ________________ is the one thing we change.
a)
Independent variable
b)
dependent variable
c)
control group
d)
test group
23.
In a good scientific experiment, we use the ____________________ to compare our results to; this will tell us if the change we made effected the results.
a)
independent variable
b)
dependent variable
c)
control group
d)
test group
24.
The ______________ is the one thing we change, and the _______________ is the one thing we measure.
a)
dependent variable, independent variable
b)
independent variable, dependent variable
c)
outcome variable, dependent variable
d)
test variable, independent variable
25.
True or False? The best way to validate your results is to have another scientist perform the SAME experiment to see if he/she gets similar results.
a)
True
b)
False
26.
True or False? The more trials performed during your experiment, the more valid and reliable your results will be.
a)
True
b)
False
27.
Which experiment will have stronger results?
a)
1000 trials performed
b)
10 trials performed
c)
50 trials performed
d)
1 trial performed
28.
Doing an experiment over and over many times is called ______________________.
a)
replication
b)
repetition
c)
time consuming
d)
re-doing
29.
Conducting another scientists experiment the exact same way they did is called _____________________.
a)
replication
b)
repetition
c)
redundant
d)
cheating
30.
True or False? A compound is created when two or more atoms are chemically combined to create a brand new substance.
a)
True
b)
False
Reset
