Scientific Method
What is a hypothesis
An educated guess
Which metric unit is used to measure length/distance?
meter
What holds the slide on the stage of the microscope?
stage clips
What do you call the jelly-like material that holds other organelles in place?
cytoplasm
What stage of the cell cycle does the cell spend mots of its time during normal functions?
Where is the X axis of a graph located? Where is the Y located?
X axis is horizontal along the bottom, Y axis is vertical and on the left
What metric unit is used to measure volume?
liter
What is the magnification of the low power objective?
4X
Which cell structure allows materials to move in and out of the cell?
cell membrane
Either explain what happens in prophase or draw a cell in prophase.
DNA condenses into chromosomes, nucleus starts to disband.
What is the difference between the independent variable and the dependent variable?
IV--what the experimenter (I or You) changes, the DV is what changes in response (what you measure)
What is a triple beam balance used to measure?
mass
What part of the microscope connects the eyepiece to the nosepiece and objectives?
the body tube
Name two differences between plant and animal cells.
Plant cells have chloroplasts and cell walls
Plant cells also usually have much larger vacuoles
What happens to the chromosomes in a cell during metaphase?
They line up in the middle.
Name two things that you do in the conclusion of the scientific method.
--write a summary of your results, state whether or not your hypothesis was supported by results, think of any practical applications your experiment might have, identify any errors, and think about how you could improve your project
What does a graduated cylinder measure?
volume
What part of the microscope rotates to change the objectives?
Revolving nosepiece
What does the endoplasmic reticulum do?
Makes proteins and lipids, helps transport materials and communications through the cell
Compare the parent cell before mitosis to the daughter cells after mitosis.
They are identical
Jeff wants to see which brand of shoes helps him jump higher. He tries Nike, New Balance, Jordans, and Crocs, and then measures the height of 3 jumps. Identify the Independent Variable, the Dependent Variable, and the number of repeated trials.
IV--type of shoe
DV--height of jump
Repeated trials--3 (but 12 is okay)
What technique is used to measure the volume of an irregularly shaped object?
Water displacement
What is the function of the diaphragm of a microscope?
Adjust the amount of light that reaches the objective lenses.
water, food, waste
Put the cell cycle in order
Interphase, prophase, metaphase, anaphase, telophase, cytokinesis