The viscosity of magma is determined by its silica content.
Basalt magma, on the one hand, which is often
of low viscosity, has a low silica content of approximately 50% or less. Rhyolite magma, on the other hand, has high viscosity due to the high silica content of
approximately 70% and more.
Gas content and temperatures of the magma are the other factors
that determine an explosive or
nonexplosive eruption. High temperatures
and high gas content (coupled with high viscosity)
cause violent explosions.
The viscosity of magma is determined by its silica content.
Basalt magma, on the one hand, which is often
of low viscosity, has a low silica content of approximately 50% or less. Rhyolite magma, on the other hand, has high viscosity due to the high silica content of
approximately 70% and more.
Gas content and temperatures of the magma are the other factors
that determine an explosive or
nonexplosive eruption. High temperatures
and high gas content (coupled with high viscosity)
cause violent explosions.
Based on the provided information, the correct answer is D. the paleontologist probably experienced heat exhaustion or heat stroke due to lengthy exposure to high temperature.
Explanation:
The term "heat stress" refers to a variety of problems associated with very warm temperatures and high humidity. Heat exhaustion and heat stroke are two specific conditions related to heat stress.
Heat exhaustion is a condition that occurs as a result of physical exertion in a hot environment. Its symptoms include weakness, nausea, dizziness, and profuse sweating. Heat stroke, on the other hand, is a more severe condition where a person stops sweating, has an extremely high body temperature, and may collapse due to lengthy exposure to high temperatures.
Since the paleontologist experienced "heat stress," it is likely that they suffered from either heat exhaustion or heat stroke. Therefore, option D is the most appropriate answer in this context.
Options A and B are incorrect because there is no mention of the paleontologist conducting experiments in a very hot climate or studying weather-related phenomena.
Option C is incorrect because the term "heat stress" does not indicate that the paleontologist is one of the greenhouse gas chemical compounds.
The correct answer is D. "Methane is one of the greenhouse gas chemical compounds." Methane is described as a colorless, odorless, flammable hydrocarbon (CH4) that is a product of decomposition of organic matter and the carbonization of coal. It is also mentioned that methane is one of the greenhouse gas chemical compounds. Greenhouse gases are gases that trap heat in the Earth's atmosphere, contributing to the greenhouse effect and climate change. Methane is a potent greenhouse gas, and its presence in the atmosphere has a significant impact on the Earth's temperature. Therefore, option D is the correct answer.
Answer: chalcogens.
Explanation: Strontium is an alkaline earth metal, it always exhibits a degree of oxidation in its compounds +2.
Chalcogens are a group of 6 chemical elements (oxygen O, sulfur S, selenium se, tellurium te, polonium Po) that have an oxidation state of -2 => Chalcogens will combine with strontium in a ratio of 1:1.
Answer: b. Fiona is correct because the diagram shows two individual simple machines.
Explanation:
A mechanical device using which we can change the direction or magnitude of force applied is known as simple machine.
For example, in the given diagram there are two individual simple machines.
The machine helps in changing the direction or magnitude of force applied by the man. As a result, it becomes easy for him to carry different things easily from one place to another.
Thus, we can conclude that the statement Fiona is correct because the diagram shows two individual simple machines, is correct.
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