11.) identify a reason to preserve wetlands.
12.) what percent of the earths freshwater is found in the ice caps and glaciers?
13.) the moon has a greater effect on ocean tides than the sun because the moon is...
14.) describe the process of evaporation.
15.) how do plants uptake water from the soil?
16.) deep ocean currents are a result of what?
17.) give three ways in which a lake may form.

Question

Accepted Answer

### Question 11
# Brief Explanations:
Wetlands are important for ecological balance. They act as natural filters, purify water by trapping sediments and pollutants, provide habitats for diverse wildlife (like migratory birds, amphibians), help in flood control by absorbing excess water, and support biodiversity. For example, marshes filter runoff, and swamps provide breeding grounds for fish.
# Answer:
One reason to preserve wetlands is that they act as natural water filters, purifying water by trapping sediments and pollutants, and also provide essential habitats for a wide variety of wildlife, supporting biodiversity. (Other valid reasons: flood control, carbon sequestration, etc.)

### Question 12
# Explanation:
## Step1: Recall Earth's freshwater distribution
Earth's total freshwater (excluding saltwater) is stored in various forms. Ice caps and glaciers hold the majority of freshwater.
## Step2: Determine the percentage
Approximately 68.7% (or about 69 - 70% in general knowledge) of Earth's freshwater is in ice caps and glaciers. The 79% written might be a miscalculation; the correct value is around 68 - 70% (more precisely, about 68.7%).
# Answer:
Approximately 68.7% (or 69 - 70% as a general estimate) of Earth's freshwater is found in ice caps and glaciers.

### Question 13
# Brief Explanations:
Tidal force depends on the inverse square of the distance (from Newton's law of gravitation, $ F \propto \frac{M}{r^2} $, where $ M $ is mass and $ r $ is distance). The Moon is much closer to Earth than the Sun (about 384,400 km vs. 149.6 million km). Even though the Sun is more massive, the Moon's closer distance makes its tidal effect stronger on Earth's oceans.
# Answer:
The Moon has a greater effect on ocean tides than the Sun because the Moon is much closer to Earth (tidal force depends on $ \frac{\text{mass}}{\text{distance}^2} $, and the Moon’s proximity outweighs the Sun’s greater mass).

### Question 14
# Brief Explanations:
Evaporation is a phase change process. It occurs when liquid water (on surfaces like oceans, lakes, soil, plants) absorbs heat energy (from the Sun, or surrounding environment) and changes into water vapor (gas). It’s a surface - based process (unlike boiling, which is bulk). For example, wet clothes dry as water evaporates from them, or a puddle shrinks as water turns to vapor. The energy (heat) breaks the intermolecular forces holding water molecules in liquid form, allowing them to escape into the air as vapor.
# Answer:
Evaporation is the process by which liquid water (on surfaces like oceans, lakes, soil, or from plants) absorbs heat energy (usually from the Sun or the surrounding environment) and changes into water vapor (a gas). It occurs at the liquid’s surface (unlike boiling, which is a bulk process) as heat breaks the intermolecular forces in the liquid, allowing water molecules to escape into the air as vapor.

### Question 15
# Brief Explanations:
Plants uptake water from the soil through their roots. Root hairs (tiny extensions on root cells) increase the surface area for absorption. Water moves into the roots via osmosis: the soil water has a higher water potential (lower solute concentration) than the root hair cells’ cytoplasm (higher solute concentration from dissolved minerals, sugars). So water moves from the soil into the root hairs, then through the root cortex (via apoplastic or symplastic pathways) to the xylem, which transports it up the plant.
# Answer:
Plants uptake water from the soil through their roots: Root hairs (extensions of root cells) increase surface area. Water moves into root hairs by osmosis (soil water has higher water potential than root cells’ cytoplasm). It then travels through the root cortex (via apoplastic/symplastic pathways) to the xylem, which transports water upward.

### Question 16
# Brief Explanations:
Deep ocean currents (also called thermohaline circulation) are driven by density differences in seawater. Density of seawater depends on temperature (colder water is denser) and salinity (saltier water is denser). When water in polar regions is cold and/or salty, it becomes dense and sinks, creating deep - water currents. For example, in the North Atlantic, cold, salty water sinks and flows southward as a deep current.
# Answer:
Deep ocean currents are a result of differences in seawater density (thermohaline circulation), where variations in temperature (colder water is denser) and salinity (saltier water is denser) cause dense water to sink and initiate deep - water flow.

### Question 17
# Brief Explanations:
Lakes can form in multiple ways: 1. Glacial action: Glaciers carve out basins (cirques) or deposit moraines (ridges) that trap water, forming glacial lakes (e.g., the Great Lakes’ formation involved glacial erosion and deposition). 2. Tectonic activity: Movements in Earth’s crust (like faulting) create depressions (rift valleys) that fill with water (e.g., Lake Baikal, formed by tectonic rifting). 3. Volcanic activity: Volcanic eruptions can block rivers with lava (forming a dam, creating a lake like Lake Pinatubo in the Philippines) or form calderas (collapsed volcanic craters) that fill with water (e.g., Crater Lake, formed in a volcanic caldera). Other ways: Solution lakes (formed by limestone dissolution), oxbow lakes (formed by river meandering, where a river bend is cut off), or artificial lakes (reservoirs) from human - made dams.
# Answer:
Three ways a lake may form:
1. Glacial Formation: Glaciers erode basins (cirques) or deposit moraines to trap water (e.g., glacial lakes in mountainous regions).
2. Tectonic Formation: Crustal movements (faulting/rifting) create depressions that fill with water (e.g., Lake Baikal from tectonic rifting).
3. Volcanic Formation: Volcanic lava dams rivers (forming a lake, e.g., Lake Pinatubo) or calderas (collapsed volcanic craters) fill with water (e.g., Crater Lake).

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Question 11

Step1: Recall Earth's freshwater distribution

Step2: Determine the percentage

Answer:

Question 12