Which of the following is not usually a gas at room temperature?
Answer(s): C
Which of the following is not usually a gas at room temperature? Sulfur is normally a soft, bright-yellow solid at room temperature. The others are gaseous at room temperature.
What are the major layers of Earth's atmosphere in order from the Earth's surface upward?
Answer(s): A
The five major layers of the atmosphere from the Earth's surface upward are the troposphere, stratosphere, mesosphere, thermosphere, and exosphere.The troposphere starts at the Earth's surface and extends to between 23,000 ft (7 km) at the poles and 60,000 ft (17 km) at the equator, with some variations due to weather factors.The stratosphere extends from the top of the troposphere (23,000-60,000 ft or 7-17 km) to about 160,000 ft (60 km).The stratosphere contains the ozone layer, which is mainly located in the lower part of the stratosphere from about 50,000-115,000 ft (15-35 km) above the surface, although the thickness varies somewhat across both the seasons and the Earth's geographical regions.The mesosphere extends from about 160,000 ft (50 km) to about 265,000-285,000 ft (50-54 miles or 80-85 km).This is also where most meteors bum up when entering the atmosphere
What are chloroplasts?
Answer(s): B
Chloroplasts are organelles found, in plant cells that conduct photosynthesis.
What is the scientific study of human culture called?
The scientific study of human culture is called anthropology, and includes study of the origin and behavior of humankind as well as its physical, social, and cultural development. Sociology is the study of human society, including patterns of social relations, social interaction, and culture. Archaeology is the study of past human life and culture by the recovery or discovery and examination of material evidence such as graves, buildings, tools, weapons, and other artifacts.
Humans have ____ pairs of chromosomes.
Humans have 23 pairs of chromosomes, or 46 chromosomes in all.
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