Answer:
A. It helped sailors steer around rocky coasts.
Explanation:
An astrolabe is an elaborate inclinometer. An inclinometer is an instrument used for angles of slope, elevation, or depression with respect to gravity's direction. It is also used as a tilt sensor, tilt indicator, slope meter, slope gauge.
<em>A. It helped sailors steer around rocky coasts.</em>
Rocky coasts are dangerous. In order to maneuver them, the sailors used an astrolabe. This helped them to understand the angles of slopes, elevation, depression of several rocks on sea.
<em>B. It aided navigators in predicting the weather.</em>
An astrolabe cannot predict the weather.
<em>C. It allowed sailors to know their north-south location.</em>
A compass is used for this purpose.
<em>D. It kept crews from getting sick.</em>
An astrolabe is not a medicinal equipment.
Answer:
A) Even-aged stands are more vulnerable to bark beetles accurately describes a benefit or a drawback of managing an even-aged tree plantation .
Explanation:
Even - aged structure is called as the stand that has one distinct size and age . These types of plants are composed of fewer species than any other structures .and even less diverse .
Bark beetles are vulnerable to mature tress , older , even - aged stands that have regrown or been replanted after any disturbance events ,
For example , The wildfire is more younger and more diverse stands.
The correct answer is - A. San Andreas Fault.
The San Andreas Fault is stretching alongside the western coast of the United States. It is a result of a divergent plate boundary, where the westernmost part of the country is slowly moving away from the North American mainland.
As it moves more and more, this part will come to a situation where the crust will be much thinner and easier to crack under the high pressure, temperatures, and magma from the mantle layer bellow. As this stats to happen, the region, already pretty active geologically, will become even more active geologically, and the stress on the crust will be result in very often and strong earthquakes.
Answer:
Its important to understand the difference between true north and magnetic north because true north is a fixed point on the globe. Magnetic north is the direction that a compass needle points to as it aligns with the Earth's magnetic field. It is also important so you know where your going.
Agriculture and fisheries are highly dependent on the climate. Increases in temperature and carbon dioxide (CO2) can increase some crop yields in some places. But to realize these benefits, nutrient levels, soil moisture, water availability, and other conditions must also be met. Changes in the frequency and severity of droughts and floods could pose challenges for farmers and ranchers and threaten food safety.<span> Meanwhile, warmer water temperatures are likely to cause the habitat ranges of many fish and shellfish species to shift, which could disrupt </span>ecosystems<span>. Overall, climate change could make it more difficult to grow crops, raise animals, and catch fish in the same ways and same places as we have done in the past. The effects of climate change also need to be considered along with other evolving factors that affect agricultural production, such as changes in farming practices and technology.
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Soil type will influence crop cultivation because different crops prefer different soils.Clay soils with their high water retention are well suited to rice whilst sandy soils with good drainage are good for root vegetables. Soil type can be influenced through the input of lime, clay or fertilizer but this can only make limited differences.
Every major advance in agriculture<span> has allowed global </span>population<span> to increase. Early farmers could settle down to a steady food supply. Irrigation, the ability to clear large swaths of land for farming efficiently, and the </span>development<span> of farm machines powered by </span>fossil<span> fuels allowed people to grow more food and transport it to where it was needed.</span>
