Question | Answer |
Dust Bowl | the name given to the U.S. plains in the 1930s during a severe drought, caused by many conditions including poor farming practices |
properties | the characteristics of an element, such as the physical qualities
(color, hardness, crystal shape) |
Mohs Hardness Scale | • rates hardness
• talc (1) to diamond (10)
• objects with higher rating can scratch objects with lower ratings |
minerals | naturally occurring, crystalline, non-living solid material with specific properties |
transparent | the ability to transmit light
clearly so that an object can
be seen through it |
quantitative | measured by the quantity of something |
Milliliters (mL) | common unit for measuring volume |
control | none of the objects in the experiment are changed – used to compare |
cell theory | the idea that cells are the building blocks that make up all living things |
white blood cell | Cells in the immune system that fight foreign substances and disease |
red blood cell | Cells that transport oxygen and carbon dioxide;
Does not have a nucleus |
tradeoff | getting rid of one thing in place for another, for balance |
immune system | The system that defends the body against foreign substances from the outside |
germ theory of disease | the idea that microbes (“germs”) can cause infectious disease and are easily spread by people |
quarantine | to keep a sick person away from others in order to prevent the spreading of a disease |
antibiotic | medicine (such as penicillin) that prevents the growth of or destroys certain microbes (anti-life) |
cell membrane | • Acts as a barrier
• controls what enters and leaves the cell |
Alexander Fleming | discovered that penicillin could destroy the cell wall of bacteria, without damaging human blood cells |
vector | an organism (not a person) that spreads disease-causing germs usually without getting sick itself |
epidemiologist | scientists who trace the spread of a disease through a population |
protist | a one-celled microbe that HAS a nucleus |
virus | a non-living particle that
causes a disease; does NOT have a nucleus |
bacteria | A type of single cell organism that has a cell wall but does NOT have a nucleus or organelles |
cytoplasm | material inside the cell that breaks down food |
nucleus | central part of a cell that directs cell's activity and holds genetic information |
nuclear membrane | separates the nucleus from the rest of the cell |