WorksheetsClauson CH. 1+2
Total questions: 50
Worksheet time: 26mins
Name
Class
Date
1.
The term biosphere refers to the parts of Earth that contain
a)
Freshwater environments
b)
living things
c)
land masses
d)
greater biodiversity
2.
The basic unit of life is
a)
DNA
b)
a species
c)
the cell
d)
an atom
3.
Which statement best explains why the shape of text differs according to the diet of the species?
a)
Individual parts must work together
b)
Organisms interact with other organisms
c)
Structure and function are related in biology
d)
Organisms must maintain homeostasis
4.
The maintenance of constant internal conditions in an organism is known as
a)
negative feedback
b)
homeostasis
c)
structure specialization
d)
adaption
5.
A beneficial inherited trait that is passed on to future generations is an
a)
homeostatic mechanism
b)
system
c)
stimulus
d)
adaptation
6.
In an experiment, the condition that is manipulated by a scientist is the
a)
control condition
b)
dependent variable
c)
independent variable
d)
constant
7.
Which phrase best describes an atom
a)
parts of a nucleus
b)
single celled organism
c)
smallest basic units of matter
d)
positively charged particles
8.
An ion is formed when an atom gains or loses
a)
electrons
b)
neutrons
c)
bonds
d)
protons
9.
Hydrogen bonds can form between regions of polar molecules that are
a)
nonpolar
b)
negatively charged
c)
uncharged(neutral)
d)
oppositely charged
10.
The attraction among molecules of different substances is called
a)
specific heat
b)
cohesion
c)
adhesion
d)
surface tension
11.
Which category of carbon-based molecules includes sugars and starches
a)
unsaturated fatty acids
b)
carbohydrates
c)
phospholipids
d)
proteins
12.
Fats, oils, and cholesterol are all types of
a)
carbohydrates
b)
nucleic acids
c)
lipids
d)
hormones
13.
Proteins are composed of which molecules?
a)
monosaccharides
b)
fatty acids
c)
nucleic acids
d)
amino acids
14.
DNA and RNA are two types of
a)
nucleic acids
b)
proteins
c)
carbohydrates
d)
lipids
15.
Which phrase best describes an exothermic chemical reaction
a)
is in a state of equilibrium
b)
does not absorb any energy
c)
forms products with higher bond energy than reactants
d)
releases more energy than it absorbs
16.
The structure of a human skin cell differs from that of a human muscle cell. The two cells most likely have different
a)
functions
b)
life processes
c)
genes
d)
ways of dividing
17.
The variety of life across the biosphere is called
a)
homeostasis
b)
genomics
c)
ecology
d)
biodiversity
18.
similar organisms that can reproduce by interbreeding belong to the same
a)
species
b)
habitat
c)
environment
d)
ecosystem
19.
All the chemical processes used to build up or break down materials are called an organism's
a)
metabolism
b)
homeostasis
c)
adaptations
d)
stimuli
20.
During an experiment, which factors are observed and measured?
a)
dependent variables
b)
constants
c)
hypotheses
d)
independent variables
21.
On Earth, biodiversity generally increases from the
a)
equator to the rainforest
b)
north to the south
c)
poles to the equator
d)
east to west
22.
Which is the correct description of evolution
a)
Change in biodiversity across Earth's surface
b)
change in the genetic makeup of a population over time
c)
relationship between organisms' structure and function
d)
beneficial inherited trait that is passed to future generations
23.
Which phrase best describes an ecosystem?
a)
the variety of organisms on Earth or in a particular area of the biosphere
b)
all living things and the places on Earth where they are found
c)
organisms interacting with each other and with nonliving things in a certain region
d)
a group of living things that can interbreed to reproduce
24.
What is the name of negatively charged particles outside the nucleus
a)
neutrons
b)
protons
c)
prions
d)
electrons
25.
To test whether a plant grows better in acidic or basic soil, the amount of water and sunlight the plants receive must be controlled as factors called
a)
independent variables
b)
observations
c)
constants
d)
dependent variables
26.
Atoms in molecules share pairs of electrons when they make
a)
polymers
b)
hydrogen bonds
c)
covalent bonds
d)
ionic bonds
27.
What gives water many properties that are important to living things
a)
hydrogen bonds
b)
specific heat
c)
density
d)
temperature
28.
Both animal fats and plant oils are made up of glycerol and
a)
fatty acids
b)
saturated fats
c)
phospholipids
d)
polar molecules
29.
The activation energy needed for a chemical reaction is decreased by a/an
a)
product
b)
enzyme
c)
substrate
d)
reactant
30.
When fatty acids cannot pack together tightly enough to make a solid fat, they have
a)
fewer hydrogen atoms
b)
more polar molecules
c)
very little glycerol
d)
no double carbon bonds
31.
Biology is the study of
a)
energy
b)
the weather
c)
minerals
d)
life
32.
A scientist noticed that the number of salamanders in ponds in the Rocky Mountains was declining. This was a(n)
a)
control
b)
hypothesis
c)
theory
d)
observation
33.
A hypothesis is a
a)
testable possible explanation of an observation
b)
concluding statement
c)
proven statement
d)
definite answer to a given problem
34.
The English physician Ronald Ross wanted to find the cause of malaria. Based on his observations, Dr. Ross suggested that Anopheles mosquito might spread malaria from person to person. This suggestion was a
a)
prediction
b)
theory
c)
hypothesis
d)
scientific truth
35.
A substance that is composed of only one type of atom is called a(n)
a)
nucleus
b)
cell
c)
element
d)
molecule
36.
A molecule that has a partial positive charge on one side and a partial charge on the other side is called a
a)
bipolar molecule
b)
charged molecule
c)
nonpolar molecule
d)
polar molecule
37.
Ionic bonds form between molecules that have
a)
opposite charges
b)
no charges
c)
the same charge
d)
neutral charge
38.
Nonpolar molecules have
a)
both negative and positive poles
b)
only a positive pole
c)
only a negative pole
d)
no negative or positive poles
39.
When placed in the same container, oil and water do not mix because
a)
water is polar and oil is non polar
b)
they are both non polar
c)
water is non polar and oil is polar
d)
they are both polar
40.
Water is a polar molecule because
a)
different parts of the molecule have slightly different charges
b)
it contains two hydrogen atoms for each oxygen atom
c)
it does not have a charge
d)
it has a charge
41.
Acidic solutions have a pH that is
a)
a negative number
b)
more than 7
c)
between 7-14
d)
less than 7
42.
All organic compounds contain the element
a)
carbon
b)
nitrogen
c)
sodium
d)
calcium
43.
Polysaccharides are
a)
lipids
b)
carbohydrates
c)
unsaturated fats
d)
proteins
44.
All the following are lipids except
a)
cholestrol
b)
earwax
c)
saturated fats
d)
starch
45.
Which of the following is a carbohydrate
a)
DNA
b)
insulin
c)
wax
d)
sucrose
46.
Molecules like in the picture are found in
a)
lipids
b)
proteins
c)
nucleic acids
d)
carbohydrates
47.
Lipid fats called oils contain
a)
mostly saturated fatty acids
b)
mostly unsaturated fatty acids
c)
amino acids
d)
many glucose molecules
48.
DNA stores
a)
carbohydrates
b)
fat
c)
heredity information
d)
protein
49.
Animals store glucose in the form of
a)
lipids
b)
wax
c)
glycogen
d)
cellullose
50.
which shows exothermic
a)
1st
b)
both
c)
2nd
d)
neither
100 %
