Biology - Cells
What is a cell?
Cells are the building blocks of all living things. They are very small.
In a science experiment, what are the controlled variables?
Variables that are held constant.
What process occurs when something goes from a liquid to a gas?
Evaporation
What is the name for the element Ca?
Calcium
What is the function of a cell wall?
The cell wall provides a structural layer and provides the cell with rigidity. It gives the cell a shape and protects the cell from outside stress.
In a science experiment, what is the independent variable?
The independent variable is the variable that is changed/manipulated
What is the particle theory of matter?
Matter is made up of small particles which are constantly in motion.
Define compound
A compound is 2 or more elements bonded together in a fixed ratio
Name an organelle that a plant cell has, but an animal cell does not.
Cell wall
Chloroplasts
Vacuole
What is osmosis?
Osmosis is the movement of water (across a semipermeable membrane) from areas of high water concentration to areas of low water concentration.
What process occurs when something goes from a gas to a liquid?
Condensation
What is a molecule?
2 or more atoms bonded together in a fixed ratio
What is the function of a vacuole?
They store nutrient and non-nutrient chemicals and they break down complex molecules.
What is the primary function of the circulatory system?
Deliver oxygen to the body's tissues and to expel carbon dioxide
When a solid item is heated, what occurs to the atoms inside of it? And does the volume of the solid increase or decrease?
The atoms vibrate vigorously and these vibrations cause the atoms to be pushed further apart. The volume of the solid increases
Give an example of a compound
H20
What are 3 of the major organs in the digestive system?
1. Stomach
2. Large intestines
3. Small intestines
4. Liver
5. Pancreas
6. Mouth
What experiment did we do in class to demonstrate diffusion?
Hot vs. cold water and blue food dye
What is the process whereby something goes straight from a solid to a gas?
Sublimation
What is one of the sub-atomic particles inside an atom?
Protons
Neutrons
Electrons