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science
revision for test
16
Science
8th Grade
08/10/2015

Additional Science Flashcards

 


 

Cards

Term


What are cells?

Definition




the smallest structural and functional unit of an organism, which is typically microscopic and consists of cytoplasm and a nucleus enclosed in a membrane.

Term


What is the difference between a unicellular and a multicellular organism?

Definition



A unicellular organism is made up of only one kind of cell capable of performing all the required functions. whereas a multicellular organism is made up of many cells.

Term


What is the difference between plant and animal cells?

Definition


Plant cells are larger than animal cells. Plant cells have chloroplast unlike animal cells Plant cells have a cell wall unlike animal cells. Vacuoles are obvious in plant cells than in animal cells i.e large central vacuoles in plant cells.

Term


What are the important organelles found in cells?

Definition

- Nucleus 

- Cytoplasm

- Mitchondria

- Chloroplast

- Vacoule

- Cell wall 

- Cell membrane

Term

What role does the Nucleus play in a cell?

Definition


Nucleus is the cells information centre. Contains chromosomes which carry DNA.

Term


what role does the vacuole play in a cell?

Definition


A Vacuole is one large water filles sack in the plant cell.  small vacuoles can be found in animal cells.

Term


what role does the Cell wall play in a plant cell?

Definition


Cell wall is the outer boundary of a plant cell. It protects things on the inside of the cell.

Term


what role does the cell membrane play in a cell?

Definition


Cell membrane is the outer boundary of ahn animal cells and inner boundary of a plant cell. this controls what substances enter and exit the cells

Term


what role does the mitochondira play in a cell?

Definition

mitochondria is the power house of the cell where ATP energy is produced ( cells that require more energy will have more mitochondria). 

Term
what role does the chloroplast play in a plant cell?
Definition


Choroplast is where the photosythesis happens, this gives the plants its green pigmentation

Term

What are the parts of a microscope?

Definition
[image]
Term


How do you calculate the magnification when using a micropscope?

Definition

 

The total magnification is the magnification of the objective (10x/40x/100x usually, but can be something else) which is further magnified by the eye piece (typically 10x, but others exist). 

Term


what are cells, tissues and organs?

Definition


Cells make up tissues. Tissues make up


organs, and organs make up body systems.


The only difference is the level of


complexity.

Term


What is cell respiration?

Definition

Cellular Respiration, process in which cells


produce the energy they need to survive



Cellular Respiration is the break down of


food with the use of Oxygen

Term

What is the equation for cellular respiration?

Definition



The formula for aerobic cellular respiration is 
C6H12O6 + O2 → CO2 + H2O + Energy (as ATP) 

The word equation for this is: 
Glucose + Oxygen → Carbon dioxide + Water + Energy (as ATP) 

Term


what is osmosis and diffusion?

Definition

Diffusion is the movement of molecules from an area of High concentration to an area of low concentration. Basically the molecules go from where they are plenty of them to where there are little. 


Osmosis is basically the same thing as diffusion but it deals solely with water.The movement of water molecules from where they are in high concentration to where they are in low concentration. 

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