Here are the true statements about ocean currents:
-
Density drives ocean currents. - True. Ocean currents are influenced by the differences in water density, which can be affected by factors such as temperature and salinity.
-
The uneven heating of Earth's surface drives ocean currents. - True. The unequal heating of the Earth's surface leads to variations in temperature and pressure, which in turn drive wind patterns and ocean currents.
-
The Earth's axial tilt drives ocean currents. - False. While the axial tilt affects the seasons and climate patterns, it is not a direct driver of ocean currents.
-
Ocean currents affect global precipitation patterns. - True. Ocean currents can influence weather and climate patterns, including precipitation distributions.
-
Ocean currents have no effect on land climates. - False. Ocean currents have a significant effect on land climates by influencing temperatures and weather patterns.
So, the true statements are 1, 2, and 4.