HMS 6th grade Science Mid-term key terms January 2011
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| 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
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| properties | the characteristics of an element, such as the physical qualities
(color, hardness, crystal shape)
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| Mohs Hardness Scale | • rates hardness
• talc (1) to diamond (10)
• objects with higher rating can scratch objects with lower ratings
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| minerals | naturally occurring, crystalline, non-living solid material with specific properties
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| transparent | the ability to transmit light
clearly so that an object can
be seen through it
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| quantitative | measured by the quantity of something
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| Milliliters (mL) | common unit for measuring volume
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| control | none of the objects in the experiment are changed – used to compare
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| cell theory | the idea that cells are the building blocks that make up all living things
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| white blood cell | Cells in the immune system that fight foreign substances and disease
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| red blood cell | Cells that transport oxygen and carbon dioxide;
Does not have a nucleus
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| tradeoff | getting rid of one thing in place for another, for balance
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| immune system | The system that defends the body against foreign substances from the outside
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| germ theory of disease | the idea that microbes (“germs”) can cause infectious disease and are easily spread by people
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| quarantine | to keep a sick person away from others in order to prevent the spreading of a disease
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| antibiotic | medicine (such as penicillin) that prevents the growth of or destroys certain microbes (anti-life)
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| cell membrane | • Acts as a barrier
• controls what enters and leaves the cell
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| Alexander Fleming | discovered that penicillin could destroy the cell wall of bacteria, without damaging human blood cells
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| vector | an organism (not a person) that spreads disease-causing germs usually without getting sick itself
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| epidemiologist | scientists who trace the spread of a disease through a population
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| protist | a one-celled microbe that HAS a nucleus
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| virus | a non-living particle that
causes a disease; does NOT have a nucleus
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| bacteria | A type of single cell organism that has a cell wall but does NOT have a nucleus or organelles
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| cytoplasm | material inside the cell that breaks down food
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| nucleus | central part of a cell that directs cell's activity and holds genetic information
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| nuclear membrane | separates the nucleus from the rest of the cell
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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