science
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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| what is water pollution | the addition of any substance that has a negative effect on water or living things that depend on water
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| what is fertilizer | chemicals generally used on farms to promote growth of crops. they also encourage excessive growth of plants and algae in and near bodies of water
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| salinity | amount of dissolved salts in the water
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| salinity of the ocean | 34-37 percent
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| industrial wastes | chemicals, smoke, and heated water from factories and mines
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| acid rain | rain that has a lower than normal PH
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| what are pesticides | chemicals intended to kill insects and other organisms that damage crops these chemicals can also kill organisms living in nearby bodies of water
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| What are the differences between ponds and lakes | Ponds are more shallow and sunlight reaches the bottom
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| What is lake turnover | Lake turnover is the seasonal change that causes water in a lake to mix and nutrients to be refreshed throughout the lake.
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| Eutrophication | The process that occurs when nutrients build-up in a lake.
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| What is oxygen | A gas required by all animals that dissolves in water.
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| Temperature | At the surface, the temperature of teh ocean is controlled by the weather. The temperature of ocean water drops rapidely in the transition zone. The deep zone is always cold.
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| Pressure | Pressure increases stedily as the deeper the water gets
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| Salinity | The total amount of dissolved salts in the water. In the ocean, the salinity is between 34, and 37 parts per thousand.
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| Light | Needed for the growth of plants an d algea. This penetraits the surface of the ocean, but none can reach below -200 meters.
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| We see a new moon when... | the Earth is in line between hte sun and the Earth.
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| We see a full moon when... | teh Earth is in line between the sun and the moon.
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| We see a half moon when... | the sun earth and moon are at a 90 degree angle.
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| There is a Spring tide when... | there is a new or a full moon
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| There is a neap tide when... | there is a half moon.
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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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