Scientific Method
What is the purpose of the scientific method?
To ask and answer questions about the natural world.
Which organelle controls what enters and leaves the cell?
Cell membrane
What do all living things have in common?
Made of cells
Which type of cell has no nucleus?
Prokaryotic
What type of variable do you change on purpose in an experiment?
Independent Variable
Which organelle is only found in plant cells and provides structure and support?
Cell wall
Who was the first to observe cells using a microscope?
Robert Hooke.
Which type of cell is more complex and larger?
Eukaryotic
What type of variable do you measure in an experiment?
Dependent Variable
What is the function of the mitochondria?
Produces energy or ATP
What part of the cell theory tells us how new cells form?
All cells come from pre-existing cells.
Give an example of a eukaryotic cell
Plant or animal cell
In the hypothesis “If plants get more sunlight, then they will grow taller,” what is the independent variable?
Sunlight
Which organelle holds the DNA of the cell and controls it?
If a new organism is discovered, what must it have to be considered living according to the cell theory?
It must be made of one or more cells.
Give an example of a prokaryotic cell
Bacteria
In the hypothesis “If plants get more sunlight, then they will grow taller,” what is the dependent variable?
Plant height
Which two organelles are found only in plant cells?
Cell wall and chloroplasts.
What are the three parts of the cell theory?
All living things are made of cells; cells are the basic unit of structure and function; all cells come from pre-existing cells.
What is the main difference between prokaryotic and eukaryotic cells?
Eukaryotic cells have a nucleus; prokaryotic cells do not