NEW
Font size
S
M
L
XL
WorksheetsChemistry
Total questions: 35
Worksheet time: 16mins
Name
Class
Date
1.
At which of the following temperatures is water a gas?
a)
32C
b)
105C
c)
0C
d)
50C
2.
Identify the reactants in the following equation
C +O2------>CO2
C +O2------>CO2
a)
C and CO2
b)
O2 and CO2
c)
C and O2
d)
CO2
3.
According to the law of conservation of mass, the mass of the reactants is always _________ the mass of the products.
a)
equal to
b)
less than
c)
more than
d)
unknown
4.
Which is NOT a sign of chemical change
a)
change in color
b)
change in shape
c)
change in energy
d)
change in odor
5.
When you make and eat scrambled eggs, changes occur in the eggs. Which of the following best describes a chemical change
a)
cooking the eggs
b)
mixing the eggs in a bowl
c)
cracking the eggs
d)
peppering the eggs
6.
In order to have a change in the state of matter, thermal energy is added or removed causing the particle to speed up or slow down. What type of energy describes the motion of matter?
a)
kinetic
b)
potential
7.
Which of the signs of a chemical change would BEST describe what happens to a dead animal after the first few days?
a)
production of a new solid
b)
odor
c)
the release of a gas
d)
the release of energy
8.
How many Oxygen atoms does the following chemical formula contain?
CaCO3
CaCO3
a)
1
b)
2
c)
3
d)
4
9.
Which type of heat transfer occurs when a hot plate is in direct contact to a skillet and food is being cooked?
a)
convection
b)
conduction
c)
none of them
d)
radiation
10.
The ability of a pond to freeze over in winter is a
a)
physical property
b)
chemical property
11.
A compound is formed by a
a)
chemical reaction
b)
mixing substances together
c)
Both A and B
d)
Neither A and B
12.
Identify the products in the following equation:
Zn + 2HCl → ZnCl2 + H2
Zn + 2HCl → ZnCl2 + H2
a)
Zn, 2HCl
b)
ZnCl2 and H2
c)
Zn and H2
d)
2HCl and ZnCl2
13.
In the following chemical formula MgCO3 how many C atoms? ___O atoms? ___Mg atoms
a)
1 C, 2 Mg, 3 O
b)
1 C, 1 Mg, 3 O
c)
2 C, 1 Mg, 3 O
d)
3 C, 3 Mg, 3 O
14.
A _______ can only be broken down into its individual atoms. Example: Gold can be broken down into Gold atoms.
a)
compound
b)
element
c)
mixture
d)
solution
15.
In a chemical reaction, the total mass of the reactansis 15.0 grams. The total mass of the products must be:
a)
more than 15.0 grams
b)
less than 15.0 grams
c)
exactly 15.0 grams
d)
exactly 30 grams
16.
The chemical properties of the substances that makeup a compound ________ during a chemical reaction
a)
stay the same
b)
change
17.
What is the name of the piece of lab equipment used for heating things?
a)
balance scale
b)
Bunsen burner
c)
Bunsen beaker
d)
graduated cylinder
18.
The smallest part of a compound is a(n)
a)
atom
b)
element
c)
mixture
d)
molecule
19.
Which of the following is a physical change?
a)
Copper reacting with a strong acid
b)
Aluminum metal is pounded into thin sheets
c)
Iron is oxidized to iron oxide.
d)
Sodium metal explodes on contact with water.
20.
We receive a tremendous amount of thermal energy from the sun by:
a)
radiation
b)
convection
c)
conduction
d)
None of them
21.
Which equation is balanced?
a)
P4 + 02 --> P4O10
b)
N2 + 3H2--> 2NH3
c)
2H2 + O2 --> H2O
d)
C + H2 -->2CH4
22.
Jose tested for starch by putting yellow-orange iodine solution on an apple and a potato. The apple stayed the same, but the potato turned black. Why did the iodine solution change color on the potato?
a)
The iodine burned the potato and turned it to ash
b)
The iodine reacted with the potato to form a new substance
c)
The iodine evaporated into a gas.
d)
The iodine mixed with the colors of the potato so it looked black.
23.
Production of new gasses or solids
a)
food that has spoiled
b)
mixing vinegar and baking soda
c)
burning a piece of paper
d)
cooking a marshmallow over fire
24.
A change in color
a)
food that has spoiled
b)
breaking the hand warmer packet
c)
burning a piece of paper
d)
cooking marshmallow over fire
25.
input or release of energy
a)
Food that has spoiled
b)
mixing vinegar and baking soda
c)
breaking the hand warmer packet
d)
burning a piece of paper
26.
difficult to reverse
a)
food that has spoiled
b)
mixing vinegar and baking soda
c)
burning a piece of paper
d)
cooking marshmallow over fire
27.
Change in color
a)
food that has spoiled
b)
mixing vinegar and baking soda
c)
breaking the hand warmer packet
d)
burning a piece of paper
28.
Which of the following subatomic particles doesn't have a charge?
a)
Neutrons
b)
Protons
c)
Electrons
29.
Which of the following subatomic particles have a negative charge?
a)
Protons
b)
Electrons
c)
Neutrons
d)
They are all negative.
30.
Which stages of the life cycle of a new synthetic material are likely to have a positive effect on the economy by providing jobs?
a)
Extraction of new resources from the earth
b)
production of the material
c)
distribution of the material
d)
disposal of the material
31.
What happens to synthetic materials when they are recycled?
a)
they are put in a landfill
b)
they are used to make new synthetic materials
c)
they are turned back into natural resources
d)
they are broken down before being thrown away
32.
Which of the following products would not be considered synthetic?
a)
plastic water bottle
b)
Kevlar vest
c)
100% cotton shirt
d)
rubber tires
33.
Atoms in this state of matter are tightly packed; they may vibrate, but they stay in the same place.
a)
plasma
b)
liquid
c)
gases
d)
solid
34.
What describes the arrangement of particles in a gas?
a)
far apart and moving freely
b)
close together and unmoving
c)
tightly packed and vibrating
d)
close together and moving freely
35.
To calculate the density of an object, you use the following formula: D=m/v. If the mass of a substance is 100g and the volume10ml, what is the density of the object?
a)
10 g/ml
b)
100 g/ml
c)
.1 g/ml
d)
.01g/ml
Reset
