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Earth Sciences
Earth Sciences is the study of the Earth in terms of Geography, Geology, Geophysics, etc. It combines the use of Sciences such as Biology, Chemistry, Physics and Mathematics to understand the Earth System.
34,763 Questions
What minerals are soft enough to be scratched by a fingernail?
Minerals that are soft enough to be scratched by a fingernail include gypsum (2 on the Mohs scale), talc (1), and calcite (3).
What gas does a plant need to make food?
Plants need carbon dioxide gas to carry out photosynthesis, a process where they use sunlight to convert carbon dioxide and water into glucose (sugar) and oxygen. This process is essential for the plant's growth and survival.
A spring works by storing potential energy when it is compressed or stretched, and releasing that energy when it returns to its original shape. This creates a force that can push or pull objects connected to the spring. Springs are commonly used in various applications such as in car suspensions, toys, and mechanical devices.
Which state in the US has the longest and shortest day of the year?
Alaska has the longest day of the year with almost 24 hours of daylight during the summer solstice. Hawaii has the shortest day of the year with around 10 hours of daylight during the winter solstice.
What is abrasion in wind erosion?
Small bits of dust and sand are blown through the air by the wind. Over time, these particles wear away the surfaces of mountains or hills. Also, wind can gradually remove soil from one area and blow it to another.
Is heating and cooling mechanical weathering?
Heating and cooling can contribute to mechanical weathering through a process called thermal expansion and contraction. When rocks heat up and expand, then cool down and contract, it can cause them to break apart due to the repeated stress.
What tools do glaciologist use?
Glaciologists use a variety of tools including ice core drills to extract ice samples, ground penetrating radar to study ice thickness, GPS devices to track glacier movement, drones to capture aerial images, and temperature sensors to monitor changes in ice temperature. These tools help researchers to study glaciers and understand how they are changing over time.
Were all the continents ever connected together before Pangaea?
Yes, approximately 300 million years ago, all the continents were connected into one supercontinent called Pangaea. This supercontinent eventually broke apart into the continents we have today.
Why streak often is more useful for mineral identifion than color?
Streak is more useful for mineral identification than color because streak shows the true color of the mineral in powdered form, which may differ from its color in its solid form. This can provide more accurate information about the mineral composition. Streak is also less affected by impurities or surface coatings that can alter the color of the mineral.
Which of water's properties directly causes mechanical weathering?
Two different properties aid mechanical weathering. First, simple dissolution and subsequent precipitation of salts will help destroy rock's surface structure.
And the expansion of water below -4oC causes a 'freeze-thaw' weathering as it breaks up the rock.
[note, in both Roman times, and more recently in Scotland, a method of breaking large boulders was to drill a series of holes across the stone, and on a frosty night allow water in the holes to break the stone apart. A minor variant of this is to hammer dry hardwood pegs into the holes as above, and wet the surface. As the wood swells, it breaks the stone. ]
What is the clue that the earth is moving?
The apparent movement of celestial objects across the sky is a clue that the Earth is moving. For example, the Sun appears to rise in the east and set in the west due to the Earth's rotation, while the changing positions of stars throughout the night indicate the Earth's rotation on its axis. Additionally, the changing positions of the planets over time are further evidence of Earth's orbital motion around the Sun.
How many polar ice caps does earth have?
Two, north polar ice cap and south polar ice cap , the arctic and the antarctic
What type of moraine forms along each side of a glaicer?
There are many types of moraines. These include medial moraine, lateral moraine, ground moraine, and terminal moraine. The type that forms along each side of a glacier is a terminal moraine. The one that forms from unsorted rock materials is called a medial moraine.
What type of change would slow the chemical weathering of the soil?
Decreasing the surface area of the rock or increasing the pH level of the soil would slow the chemical weathering process. Additionally, reducing the presence of water or lowering the temperature can also slow down chemical weathering.
What are some examples of internal forces?
Examples of internal forces include muscle contractions in the human body, tension in a stretched rubber band, and compression within a spring. These forces act within a system and are a result of interactions between the components of that system.
The waves that arrive after primary waves they move the ground back and forth?
These waves are called secondary waves, or S-waves. They travel at slower speeds than primary waves and move the ground side-to-side, causing shaking and structural damage to buildings. S-waves are more destructive than P-waves and are usually felt after the initial P-wave motion during an earthquake.
When lightning hits a lightning rod where does the lightning go?
When lightning strikes a lightning rod, the rod provides a path of least resistance for the electricity to travel safely to the ground. The lightning is then conducted harmlessly into the earth, minimizing the risk of damage to nearby structures.
What is the layer of the earth that you stand on and that is a few miles thick?
We live on the crust. It is the thinnest layer of rock.
Average temperatures are rising each year because of accumulations of carbon in the atmosphere?
Yes, the increase in carbon in the atmosphere, primarily from human activities like burning fossil fuels, is trapping more heat and causing global temperatures to rise. This phenomenon, known as global warming, leads to changes in climate patterns and can have far-reaching impacts on ecosystems, weather patterns, and sea levels.
What kind of climate is controlled by elevation more than any other factor?
Mountain climate is typically controlled by elevation more than any other factor. As elevation increases, temperatures tend to decrease, resulting in cooler climates and often more precipitation due to orographic effects. Mountain climates can vary greatly depending on elevation, with different zones such as alpine, subalpine, and montane climates.
How does water trigger mass movement?
Water can trigger mass movements such as landslides by infiltrating into the ground and reducing the friction between soil particles. This can increase the weight of the soil above and make it unstable, leading to the movement of material down a slope. Additionally, water can increase pore water pressure within the soil, further reducing the effective stress and making it easier for material to move.
How can you find the age of a layer of a rock that is surrounded by layers of volcanic ash?
You can find the age of the rock layer by using radiometric dating methods on the volcanic ash layers above and below it. By dating the layers surrounding the rock layer, you can determine the relative age of the rock.
True or false in a data plot about half the data points will lie below the line of best fit?
True. In a data plot, the line of best fit represents the average trend of the data. Therefore, approximately half of the data points should lie below the line of best fit and half should lie above it if the data is evenly distributed.
