Science Exam

Cell Wall

- a stiff wall that protects the cell, it surrounds the cell membrane and gives the cell a rigid shape
- only in plant cells

Endoplasmic Reticulum

- soft ER, rough ER
- a network of passages that carries materials around the cell
- in plant and animal cells

Vacuole

- stores food, water, waste, and other materials for the cell
- in plant and animal cells

Cytoplasm

- gel like substance between the cell membrane and the cell organelles
- in plant and animal cells

Mitochondria

- Power House of cell
- where Cellular Respiration takes place
- in plant and animal cells
sugar + oxygen {energy} carbon dioxide + water

Chloroplast

- where Photosynthesis takes place
-only in plant cells
carbon dioxide + water {solar energy, chlorophyll} sugar + oxygen

Lysosome

- Recycling Center of cell
- contains chemicals that break down food and worn out cell parts for the cell to use
- only in animal cells

Ribosomes

- makes proteins which are the building blocks of the cell
- in plant and animal cells

Golgi Body

- receives materials from the Endoplasmic Reticulum, packages them, and sends them out to other parts of the cell
- in plant and animal cells

Nucleus

- Control Center of cell
- directs all of the cells activities including reproduction
- in plant and animal cells

Cell Membrane

- protects the cell by forming an outer barrier
- regulates what materials enter and leave the cell

Archeobacteria

- one celled
- is a Prokaryote (no nucleus)
- producer and a consumer
- they have a cell wall

Eubacteria

- one celled
- is a Prokaryote (no nucleus)
- producer and a consumer
- most have a cell wall

Protista

- one celled
- is a Eukaryote (with a nucleus)
- producer and a consumer
- some have a cell wall and some don't

Fungi

- many celled (except for yeasts)
- is a Eukaryote (with a nucleus)
- is a consumer
- they have a cell wall

Plantae

- many celled
- is a Eukaryote (with a nucleus)
- is a producer
- they have a cell wall

Animalia

- many celled
- is a Eukaryote (with a nucleus)
- is a consumer
- they don't have a cell wall

Cohesion

when a substance sticks to itself

Adhesion

when a substance sticks to another substance

Capillary Action

when cohesion and adhesion are happening at the same time

Surface Tension

the tension at the surface of the water which lets water bugs "walk" on water

Groundwater

water found in the ground

Artesian water

water stored deep underground and it is stored there for a very long time. Ex: Fiji Water

Well water

water taken from groundwater

Spring water

groundwater that is naturally seeping out at the surface

Surface water

water at the surface of the earth

Dilute

to add more solvent to a solution

Concentrate

to add more solute to a solution, or decrease the amount of solvent

Solution

a mixture of a solute and a solvent that is thoroughly mixed

Solvent

anything in which a solute is dissolved (usually water and usually a liquid)

Solute

any substance that dissolves into the solvent (usually a solid)

Dissolve

a physical mixing of two sustances

Sensory Threshold

the minimum concentration of a substance that a person can detect with one of their senses

increases

heating a substance _____________ molecular motion

decreases

cooling a substance ______________ molecular motion

Conduction

heat transfer from one object to another. materials don't move- just energy. CONTACT.

Convention

heat transfer from one location to another by the movement of fluids (liquids + gases)

Radiation

heat transfer by electromagnetic rays (sun)

Heat

transfer of energy

Diffusion

also called "Passive Transport", the movement of molecules from areas of high concentration to areas of low concentration. No energy is required.

Osmosis

this is a special type of Diffusion--of water through the cell membrane. No energy is required.

Active Transport

the movement of materials through the cell membrane using energy and transport proteins.

Interphase

most of the cells life is spent in this

Prophase

the nucleus disappears, chromosomes appear (wind up)

Metaphase

middle, chromosomes line up in the middle

Anaphase

chromosomes are pulled to opposite sides of the cell

Telophase

new nuclear membrane forms, chromosomes unwind, cell splits in two