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Climates are classified based on _________________.
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Climates are classified based on _________________.
annual temperature and precipitation
How are desert and tundra climates similar?
both have little annual precipitation.
Most of the United States is located in which climate zone?
Temperate
When oceans first formed, the water wasn't salty as it is today. Which statement would logically follow?
The average density of the ocean water was lower than it is today.
The temperature of some currents change as they flow. Which current most likely likely stays at the same temperature?
Southern Equatorial Current
The global conveyor belt of ocean currents moves ocean water of different density and temperature through all of Earth's ocean basins in one loop. Which example also could be used to explain this movement of water?
a roller coaster that starts high, travels across the park as it swoops down, and rises back up again as it returns to the starting point
Why does an increase in salinity cause density current to form?
Saltier water is higher in density than fresh water. This water then sinks to bottom, forming a current.
Constant westward drive the Antarctic Circumpolar Current , which completely circles Antarctica.

How would current be different if there was a land bridge between the Southern tip of South America and Antarctica
The current would flow north into the pacific after hitting the land bridge.
Millions of years ago earths continents were in different places than they are today.

Which statement is probably true about ocean currents millions of years ago compared with today?
Both surface currents and density currents would have different routes.
Scientist think that ancient ocean travelers knew about earths ocean currents. Which would not have been a benefit from this knowledge?
They could have avoided areas of bad weather
There are four students in your group. Each student has a different explanation for it is colder at the poles than it is nearer the equator. Which of your explanations is correct?Julio says that it is colder at the polls because earth is tilted on its axis.Which element of weather is caused by a difference in air pressure between two air masses?Wind