NEW
Font size
S
M
L
XL
Worksheets2nd Six Weeks TEST Review Part II
Total questions: 22
Worksheet time: 11mins
Name
Class
Date
1.
The building block of matter
a)
electron
b)
cell
c)
atom
d)
proton
2.
Which of these represents a chemical compound?
a)
H
b)
C
c)
P
d)
H2O
3.
A chemical reaction is a process by which atoms or groups of atoms in substances are
a)
dissolved in other substances
b)
ionized by the loss of protons
c)
mixed together with atoms in other substances
d)
reorganized into different substances
4.
Which equation satisfies the law of conservation of matter?
a)
CH4 + 2O2 = CO2 + 2H2O
b)
2CH4 + 2O2 = 2CO2 + 2H2O
c)
4CH4 + 2O2 = CO2 + 2H2O
d)
CH4 + 2O2 = 4CO2 + 2H2O
5.
What cannot take place during a chemical reaction?
a)
formation of new atoms
b)
bonds breaking between atoms
c)
formation of new molecules
d)
bonds forming between atoms
6.
Two substances are combined and heat is produced. Does this provide evidence that a chemical reaction took place?
a)
Yes, because energy is absorbed
b)
Yes, because energy is released
c)
No, because heat is not a chemical
d)
No, because this would be a physical change
7.
Which is the best description of activation energy?
a)
heat added to initiate a reaction
b)
heat released as the reaction proceeds
c)
heat stored within the reactant molecules
d)
heat stored within the porduct molecules
8.
Which is true in a covalent bond?
a)
The bond forms between ions
b)
The bond forms when electrons are shared
c)
The bond holds atoms weakly
d)
The bond is caused by van der Waals forces
9.
Consider this energy diagram for a chemical reaction. Overall, is energy released or absorbed?
a)
released, because the reaction is initiated by the addition of heat
b)
released, because the energy level of the reactants is greater than that of the products
c)
absorbed, because the energy level decreases during the reaction
d)
absorbed, because the energy level of the products is greater than that of the reactants
10.
A catalyst used during biochemical processes is known as a __________.
a)
antibody
b)
enzyme
c)
ion
d)
inorganic compound
11.
Which is true about enzymes?
a)
They act on nonspecific, randomly chosen substrates
b)
After a reaction, they cannot be reused
c)
They can speed up metabolic processes in the body
d)
They cannot change shape
12.
What makes a water molecule polar?
a)
Water has the ability to be frozen
b)
The pH of pure water varies with the temperature
c)
A water molecule has a slight charge on each end
d)
A water molecule is made up of three atoms
13.
A molecule of water has which bonds?
a)
1 covalent bond
b)
2 covalent bonds
c)
1 ionic bond
d)
2 ionic bonds
14.
Adhesion is the aspect of water that causes ....
a)
polar covalent bonds to join water molecules to other substances
b)
nonpolar covalent bonds to enable water to dissolve other substances
c)
ionic bonds to cause electrons to flow through water
d)
hydrogen bonds to form between water and another substance
15.
Which pH below would be the strongest acid
a)
2
b)
7
c)
11
d)
14
16.
Which is an example of a solute?
a)
soil suspended in water
b)
sugar dissolved in water
c)
water that dissolves salt
d)
water with undissolved soil
17.
When making chocolate milk with milk and chocolate powder, what would the solvent be?
a)
chocolate powder
b)
spoon
c)
milk
d)
glass
18.
Which defines a biological community?
a)
all organisms living within a type of biome
b)
all the interacting populations in an area
c)
many interacting ecosystems in an area
d)
the living and non-living things in a region
19.
Which explains why secondary succession generally occurs more rapidly in an area than does primary succession.
a)
average precipitation is higher
b)
moderate climatic conditions exist
c)
pioneer species are microscopic
d)
soil formation has already occured
20.
The increased concentration of pesticides in the tissues of organisms that are high on the food chain is an example of ________________.
a)
biodiversity
b)
biological augmentation
c)
biological magnification
d)
bioremediation
21.
Eating a sweet potato can provide energy for human metabolic processes. What is the original source of this energy?
a)
protein molecules stored in the potato
b)
starch molecules stored in the potato
c)
vitamins and minerals from the soil
d)
light energy transformed by photosynthesis
22.
In an ecosystem, what happens to the atoms of certain chemical elements, such as carbon, oxygen, and nitrogen?
a)
they move into and out of living systems
b)
they are only found in abiotic factors
c)
they move out of living systems and do not return
d)
they move into living systems and remain there
Reset
