How do crystals in extrusive rocks form?

Answers

Answer 1

Answer: Extrusive Igneous Rocks Igneous rocks are called extrusive when they cool and solidify above the surface. Theses rocks usually form from a volcano,so they are also called volcanic rock

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Which explains how the Sierra Nevada Mountains of California cause the southwestern United States to have a desert climate? A. The mountains block warm moist winds from the Pacific Ocean. As the air rises, it cools and loses its moisture, leaving dry winds to blow over the southwest. B. The mountains absorb excess heat energy from the sun, which warms the air over the southwest and causes the region to be a desert. C. The mountains block warm moist winds from the Pacific Ocean. As the air rises, it heats up and loses its moisture, leaving hot, dry winds to blow over the southwest. D. The mountains reflect excess heat energy from the sun, which warms the air over the southwest and causes the region to be a desert.I think it's A.
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What are two methods that scientists use to predict volcanic eruptions

Answers

Seismographs and they check local springs for sulferic acids.

Hypothesis and experimentation

Extensive commercial logging, the use of wood for cooking and heating, and excessive clearing of land by subsistence farmers has led to __________________ in most areas of Sub-Saharan Africa.A)
erosion
B)
deforestation
C)
desertification
D)
water pollution

Answers

Extensive commercial logging, the use of wood for cooking and heating, and excessive clearing of land by subsistence farmers has led to __________________in most areas of Sub-Saharan Africa.

B)
deforestation

B, because when you find a land that you like to crop on and it has trees, then you have to take down the trees in order to crop that land.

Round 261.799 to the nearest tenth

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The answer will be 261.8 because the tenths are the 1st digits after the decimal points which rounds up the 9s to the the 80 but you don’t have to include the zero on the final answer

Not gonna lie I think it could be 261.8 but that is definitely just a guess and not the right answer

Why does the difference in arrival times of P and S waves increase at seismograph recording stations that are farther away from the epicenter?

Answers

The difference in arrival times of P and S waves increasese at seismograph recording stations because the farther a seismic recording station is from the earthquake epicenter.

Why does the difference in arrival times of P and S waves increase at seismograph recording stations?

As the P and S waves travel out from an earthquake the P waves get progressively farther ahead of the S waves. Therefore, the farther a seismic recording station is from the earthquake epicenter the greater will be the difference in time of arrival between the P and S waves.

What happened to the difference in the arrival time between the P wave and S wave as the distance from the earthquake increases?

S waves, which travel at about half the speed of P waves, arrive later. A seismic station close to the earthquake records P waves and S waves in quick succession. With increasing distance from the earthquake the time difference between the arrival of the P waves and the arrival of the S waves increases.

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This difference increases because p-waves travel faster than s-waves. Therefore, if a seismograph is far from the epicenter, readings of the p-waves will arrive first, but since those waves travel faster than s-waves, it might be a bit longer before readings of the s-waves appear.

What is the difference between aquaculture and pisciculture?

Answers

Aquaculture- it is the farming of freshwater and saltwater organisms such as finfish, mollusks, crustaceans and aquatic plants. Also known as aquafarming, aquaculture involves cultivating aquatic populations under controlled conditions, and can be contrasted with commercial fishing, which is the harvesting of wild fish. Commercial aquaculture supplies one half of the fish and shellfish that is directly consumed by humans.

Pisciculture- Fish farming is the principal form of aquaculture, while other methods may fall under mariculture. Fish farming involves raising fish commercially in tanks or enclosures, usually for food. A facility that releases juvenile fish into the wild for recreational fishing or to supplement a species' natural numbers is generally referred to as a fish hatchery. The most common fish species raised by fish farms are salmon, carp, tilapia, European seabass, catfish and cod.

What helped scientists understand that Earth's interior is liquid? A) P waves cannot travel through liquids.

B) P and S waves cannot travel through liquids.

C) P and S waves travel through liquids at different speeds.

D) S waves cannot travel through liquids.

Answers

The Earth’s interior is composed of several layers: the crust, the mantle and the core. Scientists used waves and their speed to study the Earth's interior. The speed of seismic waves is affected by the properties of the material the waves pass through. The stiffness of material affects the speed of these waves. P-waves, or pressure waves, go through both liquids and solids, while S-waves, or shear waves go through solids but not liquids. The following helped scientists understand that Earth's interior is liquid: S waves cannot travel through liquids. Correct answer: D

The correct answer is D s waves cannot travel through liquids

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