Stars are made of very hot gas. This gas is mostly hydrogen and helium, which are the two lightest elements. Stars shine by burning hydrogen into helium in their cores, and later in their lives create heavier elements.
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B) Excretory
C) Integumentary
D) Lymphatic
Digestive system includes the esophagus, pancreas, and large intestine. Correct option is A.
The organs mentioned, namely the esophagus, pancreas, and large intestine, are all part of the digestive system. The digestive system is responsible for processing food, breaking it down into nutrients, absorbing those nutrients, and eliminating waste products from the body. Here's a brief description of the mentioned organs' roles in the digestive system:
Esophagus: The esophagus is a muscular tube that connects the mouth to the stomach. Its primary function is to transport food from the mouth to the stomach through a process called peristalsis, which involves rhythmic muscle contractions.
Pancreas: The pancreas is both an endocrine and exocrine gland. As part of the digestive system, it plays a crucial role in producing digestive enzymes and releasing them into the small intestine. These enzymes aid in the breakdown of carbohydrates, proteins, and fats, enabling their absorption.
Large Intestine: The large intestine, also known as the colon, is the final part of the digestive system. It is responsible for absorbing water and electrolytes from undigested food, forming feces, and eliminating waste from the body through the rectum and anus.
Together, these organs work harmoniously within the digestive system to ensure the proper digestion and absorption of nutrients, as well as the elimination of waste materials.
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b. malleable and ductile.
c. gases at room temperature.
d. shiny.
Unlike metals, many non-metals are malleable and ductile. Thus, the correct option is B.
Non-metals are those metals which lack all the metallic attributes which are found in metallic elements. The non-metals are good insulators of heat and electricity. They are mostly gases and sometimes also liquid. Some of the elements then are even solid at room temperature include Carbon, sulphur and phosphorus.
A malleable material is the material in which a thin sheet can be easily formed through hammering. Gold is the most malleable metal found in nature. In contrast, ductility can be defined as the ability of a solid material to deform under the tensile stress.
Therefore, the correct option is B.
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B.the area nearest to the Earth's crust
C.the area in-between the Earth's crust and core
D.the area nearest to the Earth's core
The area of the Earth'smantle that is the densest is the area nearest to the Earth's core. The correct option is D.
The earth is divided into three layers: the crust, the mantle, and the core. This is the earth's outer layer, and it is composed primarily of solid rock, primarily basalt and granite.
Oceaniccrust and continental crust are the two types of crust. The oceanic crust is denser and thinner, and it is mostly made up of basalt.
The five Earth systems (geosphere, biosphere, cryosphere, hydrosphere, and atmosphere) interact to create the environments we know.
The core is the earth's densestlayer, with a density ranging from 9.5 to 14.5g/cm3.
The Core is divided into two layers: the inner core and the outer core. The interior core is solid, while the exterior core is liquid (or semi-liquid).
Thus, the correct option is D.
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