Worksheetsbio 1
Total questions: 42
Worksheet time: 22mins
Three of the four answers below are characteristics of water. Select the exception.
stabilizes temperature
produces salt
common solvent
causes surface tension through cohesion
How do hydrophilic molecules react with water?
mix evenly with
attracted to
repelled by
absorbed by
Critical thinking implies all of the following except...
believing what ppl tell you
decided whether ideas are based on opinions or evidence
being aware of bias
judging information before you accept it
If an atom has 4 electrons in its second energy level, which of the following must be true?
The second energy level is not reactive.
The third energy level must have at least two electrons.
The first energy level must have eight electrons
The first energy level must have two electrons.
Which of the following would be used in connection with the word base?
contents of the stomache
bleach
a ph less than 7
excess hydrogen ions
A compound is...
a combination of two or more atoms
a combination of two or more different atoms
electrically charged
a carrier of one or more neutrons
When electrons are shared equally by atoms:
non polar covalent bond
polar covalent bond
hydrogen bond
isotope
What is the chemical or combination of chemicals that keep the pH of the body within a normal range by taking up or releasing hydrogen ions?
ions
acid
buffer
base
One of the descriptions of a living organism states: "Organisms undergo descent with modification." This describes which aspect of living things:
heredity
structural complexity
homostasis
evolution
When defining a living organism, an organism's homeostasis can be defined as:
modifications over time
maintaining stable internal conditions
a genetic system that can be replicated exactly
the totality of a cell’s process
The scientific method is unable to address which of the following?
morality and ethics
supernatural phenomena
subjective questions
all of the above
Identify what is considered to be the smallest living structure.
organisms
cells
organelles
atoms
A pH of 4 indicates what?
neutral
base
acid
none of the above
What type of bond is formed whenever atoms share a pair of electrons?
ionic
polar
covalent
metallic
____are used by scientists to determine the age of fossils?
isomers
ions
electrons
isotopes
What is the maximum number of electrons that an energy level (except the first one) may contain?
6
8
2
4
The goal of a scientific experiment is ultimately to:
demonstrate that alternative hypotheses cannot occur
test how conditions in nature cannot be simulated in a lab
• show that your hypothesis will always occur
find the exact answer in a laboratory setting only
Which statement is true?
Electrons closest to the nucleus are at the lowest energy level.
Electrons are unable to move out the assigned orbital space.
The innermost orbital holds eight electrons.
No more than eight electrons can occupy a single orbital.
Partial charges between atoms cause what kind of bond to form?
hydrogen
ionic
non polar covalent
polar covalent
Which two subatomic particles are always equal in neutral atoms?
protons & neutrons
protons & electrons
neutrons & electrons
protons, neutrons & electrons
Observation, hypothesis, experimentation, and conclusion describe the steps of what?
inductive reasoning
the scientific process
critical thinking
an experiment
Water is important to living organisms because...
it has the capacity to dissolve few substances.
of its individualistic properties
its ability to become more dense at lower temperatures
its temperature stabilizing effects
When an electron loses energy it...
moves up to the next energy level (away from the nucleus).
flies off from the atom
donates that energy for the bonding of atoms into molecules.
moves down to the next energy level (closer to the nucleus).
Which of the following statements is the most accurate?
Cells contain organelles made up from macromolecules
A cell is the lowest level of structure that can perform all functions essential for lie
A cell is the basic unit of structure and function in an organism.
all of the above are correct
Cellular pH is kept near a value of 7 due to the action of what?
ions
buffers
salts
isotopes
Changing which of the following will result in an atom changing its elemental properties?
protons
ions
neutrons
electrons
Which substance is not a compound?
salt
water
carbon
methane
The test of a hypothesis is a(n):
theory
question
challenge
experiment
Which of the following organization levels is the most inclusive?
species
cell
population
communities
The concept that modern organisms descend from similar, often extinct, related organisms is called what?
common descent
artificial evolution
natural selection
darwin’s theory
Hydrogen bonding in water is a consequence of...
the non-polar bonding that occurs between hydrogen and oxygen.
none of the above
excessive hydrogen dissolved in the water.
the polar covalent nature of water molecules.
What is metabolism?
the process of digestion
maintaning stable conditions
totality of orgasisms processes
The process of photosynthesis in plants
What comes before organs?
tissues
cells
organ systems
organisms
What would a rain forest be considered?
biosphere
communities
ecosystem
population
What is the term for the name of a living species
humanitary name
homosapian name
binomial namd
genotype name
What would an area with plants, trees, lions and called
Populations
Communities
Ecosystems
Biosphere
What element makes up most of the human body?
Oxygen
Hydrogen
Carbon
Nitrogen
What are isotopes
same protons different electrons
same electrons different protons
same protons different neutrons
same neutrons different protons
Why does radioactive decay occur
Not enough electrons
imbalanced number of protons and neutrons cause instability
As time passes it slowly starts to decay due to not enough protons
All of the above
When dating fossils what do you call the rate life of C-14
Half-life
Half-time
Half-lived
Half-Year
What are tracers
(a)
What is the formula to find unm FOV
(a)
