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Chapter 2/3 Part 1
Test Description: Environmental Science -> Biochemistry chapter
Instructions: Answer all questions to get your test result.
1) _______ is anything that takes up space and has mass.
A
mass
B
weight
C
matter
D
atom
2) __________ is the quantity of matter.
A
atom
B
weight
C
mass
D
matter
3) Why are mass and weight not the same thing?
A
Mass is dependent on gravity.
B
Weight is the amount of matter.
C
Mass is the amount of weight.
D
Weight is dependent on gravity.
4) What is the difference between the three states of matter (solid, liquid and gas)?
A
The states move at different speeds.
B
Each state has different amount of molecular motion in it.
C
The molecules in each state move different directions.
D
The states are all made of different atoms.
5) _____ is a pure substance that cannot be broken down chemically.
A
element
B
compound
C
macromolecule
D
molecule
6) More than 90% of living things are composed of what four elements?
A
CHOS
B
CH2O
C
CHON
D
CHSN
7) Why are atoms important?
A
Atoms provide the energy for living things.
B
Atoms release the energy living things need for chemical reactions.
C
Atoms are the basic unit of life.
D
Atoms determine the characteristics of the things they compose.
8) All of these are correct about the atom EXCEPT.
A
Electrons are negative particles found in energy levels.
B
Electrons are negative particles found in the nucleus.
C
Protons are positive particles found in the nucleus
D
Neutrons are neutral particles found in the nucleus.
9) A _________ is made of two different elements.
A
compound
B
atom
C
molecule
D
element
10) A ________ is made of two atoms covalently bonded together
A
molecule
B
element
C
atom
D
compound
*select an answer for all questions
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