Flashcards in Cells and the Microscope Deck (70):
How many steps are involved in using a microscope?
Name the steps involved in using a microscope
1. Clean the lens 2. Make sure the lowest power objective lens is over the stage. 3. Switch on the light.
4. Put a drop of water in the middle of the slide. 5. Place a sample in the drop of water. 6. Lower the coverslip at a 45 degree angle to get rid of air bubbles. 7. Focus on the sample with the lowest power objective lens and sketch what is seen. 8. Move to the next power objective lens and sketch what is seen.
what is an organism made up of?
cells tissues organs system organism
what is another name for a living thing?
Why does an organism grow?
because cell division happens where an organism splits in two and so on.
what is a cell made up of?
Cell membrane – allows substances to pass in and out of the cell
•Cytoplasm – watery fluid that gives support to the cell
•Nucleus – controls the cells activities
•Vacuole – storage of food, water, wastes
•Cell wall (only in plant cell) – gives strength to the cell
•Chloroplasts (only in plant cell) – contains chlorophyll to help make food
Cell membrane function
allows substances to pass in and out of the cell
Cytoplasm – watery fluid that gives support to the cell
Nucleus – controls the cells activities
Vacuole – storage of food, water, wastes
cell wall function
Cell wall (only in plant cell) – gives strength to the cell
Chloroplasts (only in plant cell) – contains chlorophyll to help make food
what are chloroplasts
what is a cell wall
what is a vacuole
what is a nucleus
what is cytoplasm
what is a cell membrane
what is a cell
what do all cells have
what do plants cells have
what is a microscope?
what are the four main parts of a microscope
what is the difference between a plant and an animal cell
draw cells and a microscope
how do you calculate magnification
how do you prepare and examine something under a microscope
name some different types of cells and their functions
what is the function of an eyepiece
what is the function of focus knobs
what is the function of the stage
what is the function of the objective lens
what is a system
what is an organ
what is a tissue
what is growth
what is iodine
what is a coverslip
how do cells grow
know other labels on a microscope.
What do each of the two new cells contain?
one of the two identical nuclei
what happens to the nucleus when a cell divides?
it divides into two seperate nuclei
how are cells organised and how do they work?
Each cell co-operates with other similar cells. Groups of similar cells then combine together to co-operate with each other.
what do plants and animals contain?
many different types of cells
give an example of two different types of animal cells.
red blood cells and the cells on the inside of your mouth
give an example of two different types of plant cells.
the cells on the outside of a root of a plant and the green cells in a leaf
name the things that make cells similar?
colour, size, shape or structure
what does a tissue contain?
large numbers of similar cells
what is an organ made of
what is a system made of
groups of large numbers of similar cells that carry out different functions form...
name different types of tissues and their function
Red blood carries oxygen.
Muscle contracts to allow movement.
give an example of an organ and the type/s of tissue/s it is made of
muscle tissue and it has a good blood supply
give examples of animal organs
heart, lungs, brain, kidneys
give examples of plant organs
leaves roots and flowers
give an example of a system
the eyes, ears, skin, nose and tongue are organs that join together to form the sensory system
what is an organism
a living thing ie. a human or a tree
what is the function of the nosepiece
to rotate to allow the use of the different lenses located on the nosepiece
what is the function of the mirror
to reflect light up through the object
what is the function of...
the coarse focus knob
the fine focus knob
= to bring the object roughly into focus
= allows for precise focusing (not on all microscopes)
what do systems work together to do?
to allow the organism to function properly and stay alive
what do some microscopes have instead of a mirror
what does magnification mean
how many times bigger the object appears when seen through a microscope
how do microscopes work
by passing light through a thin slice of an object
why is the microscope focused
to give a clear view of an object
what does contolling the amount of light shining through the object also help to do?
form a clear view
name to ways of forming a clear view using a microscope
contolling the amount of light shining through the object and focusing in on the object
what does the eyepiece lens usually have marked on it
give an example
x10 = it magnifies the object ten times
each objective lens gives a different...