Download Daily PACT Review Questions

Science Grade 7 Daily PASS Review Questions
DATE
QUESTION
1.
2.
7-1.1 What is the proper way to carry a microscope?
3.
7-1.4 Why should you make several trials in an
investigation?
4.
7-1.5 How do graphs and charts show the relationship
between you independent and dependent variables?
5.
6.
7-2.1 What is a cell?
7.
8.
7-2.1 Explain the function of the mitochondria.
9.
7-2.2 What are the major structural differences
between a plant and an animal cell?
10.
7-2.3 Compare the body shapes of bacteria.
11.
7-2.3 Compare the characteristics of the euglena,
paramecium, and amoeba.
7-1.3 When conducting a scientific investigation, why
should you test only one variable?
7-2.1 What is an organelle?
7-2.1 Describe the function of the nucleus.
ANSWER
A microscope should be carried by
the arm and the base.
An experiment will not be valid
unless you control all but one
variable. It will not be a fair test.
You may not come up with the same
results each time. You should make
several trials and take the average of
all the trials.
Graphs and charts organize your data
and provide an easy means of
comparing the changes between the
variables.
The cell is the smallest unit of life
that conducts all life functions.
Organelles are smaller structures
within a cell that carry out life
functions.
The mitochondria break down sugar
and releases energy.
The nucleus is the control center of
the cell. It directs all of the life
functions that the cell carries out.
Plant cells have a cell wall for added
support and protection, large
vacuoles for water storage, and
chloroplasts for converting light
energy into food. Animal cells have
no cell wall, no chloroplasts, and
have smaller vacuoles.
Spirilla are bacteria that have spiral
shaped bodies.
Cocci are bacteria that have round or
sphere shaped bodies.
Bacilli are bacteria that have rod
shaped bodies.
The euglena contains chloroplasts to
make its own food. It uses a whiplike flagella to move about.
The paramecium uses cilia to move
about. It also has a groove that acts
as a mouth opening to let food enter.
The amoeba pseudopods, finger-like
projections of cytoplasm, to move
and obtain food.
Department of Curriculum and Instruction 2/5/07
12.
7-2.4 Compare and contrast the processes of
photosynthesis and respiration.
13.
7-2.4 Briefly explain the process of mitosis.
14.
7-2.5 What is heredity?
15.
7-2.5 What is the difference between a genotype and a
phenotype?
16.
7-2.5 What is a dominant trait?
17.
7-2.5 In what instance will a recessive trait be
expressed?
18.
7-2.6 What is a Punnett square?
19.
7-2.6 Explain the difference between a purebred
organism and a hybrid.
20.
7-2.7 Distinguish between an inherited trait and an
environmental trait.
21.
7-3.1 Put the following group of words in order from
simplest to more complex: system, cell, organ, tissue.
22.
7-3.2 List the primary organs make up the digestive
system?
23.
7-3.2 What is the function of the liver?
Photosynthesis and respiration are
opposite reactions. Photosynthesis
uses light energy to turn water and
carbon dioxide into food.
Respiration takes food and breaks it
down into carbon dioxide and water
to release energy.
Mitosis is the process of cell division
that results in a parent cell making a
copy of itself, resulting in two
identical daughter cells.
Heredity is the passing of traits
(physical characteristics) from
parents to offspring.
The genotype is the genetic makeup
of an organism.
The phenotype is the outward
physical appearance and behavior of
an organism as a result of its
genotype.
A dominant trait will always be
expressed even when a recessive trait
is present. (TT or Tt)
A recessive trait can only be
expressed when there is no dominant
allele present for that trait. (tt)
A Punnett square is a tool used to
predict the ratio of possible genes
that will be expressed in an offspring
based on the genes of the parents.
A purebred organism has two of the
same alleles for a trait. (TT, or tt). A
hybrid has one dominant and one
recessive trait for an allele.
An inherited trait is passed
genetically from parent to offspring.
Some physical characteristics can
be influenced or changed by
environmental factors such as
temperature, light, and availability of
food. (i.e.: fewer leaves on a tree
during a drought)
Cell > tissue> organ > organ
systems.
A tissue is a group of specialized
cells that works together.
An organ is a two or more tissues
that work together to perform a
specific function.
An organ system is two or more
organs that work together to perform
a specific function.
Mouth> esophagus> stomach> small
intestines> large intestines> rectum>
anus
The liver produces bile that is used to
break of fat particles during
digestion.
Department of Curriculum and Instruction 2/5/07
24.
25.
26.
27.
7-3.2 What is the function of the pancreas?
28.
29.
30.
7-3.2 What muscle aids in the breathing process?
31.
7-3.2 What are the three main parts of the nervous
system?
32.
7-3.2 What are the 3 main parts of the brain and what
are their functions?
33.
7-3.2 What are the three types of muscles and their
function?
34.
7-3.3 What is the function of the skeletal system?
35.
7-3.3 What is the function of skin?
36.
7-3.3 All of the body systems are dependent on the
______________________ system.
37.
7-3.3 Summarize how the respiratory system and the
circulatory system work together.
38.
7-3.3 Describe how the digestive system works with
the circulatory system.
7-3.2 What is purpose of the gall bladder?
7-3.2 List the 3 types of blood vessels?
7-3.2 How do the blood vessels work together to
complete the circulatory system?
7-3.2 What is the function of the lungs?
7-3.2 What is the function of the kidneys?
Produces digestive fluids that help
break down food during digestion.
The gall bladder stores bile produces
by the liver until it is needed.
Arteries, capillaries, and veins
Arteries carry oxygen rich blood
away from the heart. Capillaries are
very small blood vessels where the
oxygen and carbon dioxide are
exchanged. Veins carry carbon
dioxide and other waste products
from the body parts back to the heart.
The diaphragm contracts & releases
to move air in and out of the lungs.
Carbon Dioxide and Oxygen are
exchanged between the air and blood.
The kidneys filter urea and other
waste materials out of the blood. The
waste materials are then eliminated
as urine.
The brain, the spinal chord, and the
peripheral nerves are the main parts
of the nervous system.
The cerebrum control thoughts and
voluntary actions. The cerebellum
helps with balance and coordination.
The brain stem controls vital
involuntary actions such as
breathing, heartbeat, and digestion.
Skeletal muscle attaches to the bones
and provides the force to move the
bones. Cardiac muscle is the muscle
that forms the heart. Smooth
muscles control many types of
involuntary movement, such as
digestion.
The skeletal system provides shape
and support for the body, protects
many organs, produces blood cells,
and store some materials.
Skin covers the body and prevents
water loss, helps control body
temperature, helps protect the body
from injury and infection, and gets
rid of wastes.
All of the body systems are
dependent upon the circulatory
system to transport materials
throughout the body.
The respiratory system works with
the circulatory system to ensure that
oxygen enters the blood stream and
that carbon dioxide is removed from
the blood stream.
The circulatory system picks up
nutrients that have been made
available through the digestive
process and transports them
throughout the body.
Department of Curriculum and Instruction 2/5/07
39.
7-3.3 How does the nervous system work with the
muscular system and the skeletal system?
40.
7-3.4 What is an infectious disease?
41.
7-3.4 Explain the responsibility of the immune system
to the body.
42.
43.
7-3.4 What causes a cold or the flu?
44.
7-3.4 Explain how diabetes affects the body.
45.
7-3.4 How does asthma affect the body?
46.
7-4.1 How would you summarize a population?
47.
48.
7-4.1 How would you summarize a community?
49.
7-4.1 Which is larger, a biome or an ecosystem?
50.
7-4.1 Compare an organisms habitat with its niche.
51.
7-4.2 What is a food chain?
52.
7-4.2 Compare a food chain to a food web.
53.
7-4.3 What is a natural hazard?
7-3.4 How would you describe a noninfectious
disease?
7-4.1 Compare a community with an ecosystem?
The nervous system relays impulses
to and from the muscular and skeletal
systems to direct behavior and
movement.
Diseases that are caused by
pathogens, such as bacteria, viruses,
fungi, or protists, that is easily spread
from one person to the next.
The immune system recognizes a
pathogen and responds to it
according to its type.
Colds and the flu are caused by
viruses.
Noninfectious diseases are not
caused by pathogens. They are
inherited or cause by a malfunction
in a body system.
Diabetes is a disorder that results in
higher than normal blood sugar. It is
caused by the body’s inability to
produce or use insulin.
Asthma affects the lungs and the air
passages within the lungs. The
airways become swollen and restrict
airflow. This is caused by allergens
such as dust, mold, and pet dander.
Exercise and cold weather can also
cause an asthma attack.
A population is all the individuals
belonging to a particular species in a
given area at one time.
All the different populations in an
area at a particular time.
A community is all the different
populations in an area; whereas, an
ecosystem is made up of all the
communities in an area.
A biome is larger. A biome is made
up of all the ecosystems in area
according to climate, vegetation, etc.
An organism’s habitat is the place
where it finds food, water, and
shelter. Its niche is the role or job it
plays within its environment.
A food chain uses pictures or words
and arrows to illustrate the energy
that is transferred from one
organism to another.
A food web is made up of several
food chains that interconnect with
one another.
An event that causes a change in an
environment, such as a landslide, a
flood, or a wildfire.
Department of Curriculum and Instruction 2/5/07
54.
7-4.3 What is a limiting factor?
55.
7-4.3 Summarize how changes in a population can
affect an environment.
56.
7-4.3 Explain carrying capacity.
57.
7-4.4 Why is soil quality so essential to an ecosystem?
A change in the environment that
affects the number of organisms an
environment can support, such as
climate and the availability of food,
shelter, and water.
The number of births or deaths in a
population may affect an
environment by depleting some
resources. Immigration or
emigration of other species into a
population or community may also
put stress on the number of resources
available in an ecosystem.
Carrying capacity is the maximum
number of organisms that an
environment can support.
Every organism that lives on land
depends on the soil either directly or
indirectly. If the soil quality
changes, this will directly affect the
types of plants that will grow in that
area, thusly affecting all the
organisms that depend on those
plants for food.
Department of Curriculum and Instruction 2/5/07