Transcript 5th Grade Science CRT

CRT Study Guide
• A well-known scientist who
built the most powerful
microscope of his time was
__________________________.
• His invention was considered a
major contribution to science.
answer
van
Leeuwenhoek
question
• Bacteria, which is
made of ____________
___________, are
known to be the
simplest organisms.
answer
single cells
question
• Most cells have a ___________.
This cell structure is
sometimes called the “brain” of
the cell because its function
(job) is to “control all of the
cell’s activities.” It controls
how and when the cell grows,
develops, and divides.
answer
nucleus
question
• The __________ ____________
is a cell structure that is
common to both plant and
animal cells. Its function (job)
in both is to “control the
movement of substances into
and out of the cell.”
answer
cell
membrane
question
• _____________________ is a
jelly-like substance found in
plant and animal cells. It fills
most of the cell and has
other cell structures floating
in it. It is made up mostly of
water.
answer
cytoplasm
question
• When an organism is made up of
many cells and different kinds of
cells, each kind of cell has a
special______________________.
For example, blood cells have a
different job than muscle cells.
They each have a different job to
do, and that keeps us alive and
healthy.
answer
function
question
• There are two cell structures
that are found ONLY in plant
cells. They are ______
________ and the
___________________. You will
never find these cell structures
in animal cells!
answer
cell wall and
chloroplasts
question
• When sunlight passes
through a prism, the light
______________________
_________________ called
the visible spectrum.
answer
separates into
different colors
question
•When light colors
are ______________,
we CANNOT see the
color.
answer
absorbed
question
•The “bending of light
as it moves from one
material to another”
is known as ______.
answer
refraction
question
• Farsighted means a person
CAN see far away (distant)
objects clearly, but close
(nearby) objects look blurry.
Glasses with ____________
lenses correct farsighted
vision.
answer
convex
question
• The part of the eye that
light passes through to
help us see nearby
objects is called the
____________.
answer
• lens
question
• On a rainy day, you may
observe a ______________
in the sky as light passes
through raindrops. This is
because raindrops are like
tiny prisms in the air.
answer
rainbow
question
• If you see an object such as a
green car, you know that the
color green is the color that is
reflected…not absorbed. You
will not see the colors that are
absorbed. Therefore, when you
look at grass, you know that
__________ is not absorbed.
answer
green
question
• The function of the
_____________ in the
human eye is to “control
the amount of light that
enters the pupil.”
answer
iris
question
• We know that a ___________
reflects the most light of
common household objects.
That is why you can see
your own image, as well as
other images of differing
colors, in one.
answer
mirror
question
•The _________ is
the part of the
eye that bends
light rays.
answer
cornea
question
•The “bouncing back
of light from a
surface” is known as
________________.
answer
reflection
question
• When you see your image in
a mirror, ________________
are bouncing back from the
surface of the mirror. This
is what allows you to see
your reflection.
answer
light rays
question
• A person who can see nearby
objects clearly but cannot see
distant objects is nearsighted.
A nearsighted person’s vision
would be corrected by wearing
glasses that have
____________ lenses.
answer
concave
question
• Tilting a mirror in front of your
face so that you are changing
the angle of the light ray hitting
the mirror, prevents you from
seeing your own face but
instead ___________________.
answer
another image
question
• Contact lenses are a type of
corrective lens for people who
“need glasses”. They work to
correct vision because they are
very similar to the ___________
in the human eye.
answer
• cornea
question
• The reason you SEE colors of
objects is that the object is
reflecting the light color that you
are seeing. It absorbs all the other
light colors of the visible spectrum.
So, when you notice that an apple
is red, you know that it is
_____________________________.
answer
reflecting light