1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
MArishka [77]
3 years ago
8

A social research methods class wants to study smoking. First, the professor asks how many people in the class are smokers. Two

people indicate that they are. Then she asks how many people have smoked a cigarette in the past week and ten people indicate that they had. From this, the class decides, for the purposes of the survey, a smoker will be anyone who has smoked a cigarette in the past week and currently owns a pack of cigarettes. This is a(n):_______.
a. ethical challenge.
b. ethnography.
c. hypothesis.
d. operational definition.
e. spurious correlation.
Social Studies
1 answer:
Ray Of Light [21]3 years ago
6 0

Answea hi

Explanation:

puesta es la c res        la

You might be interested in
The Fifth Amendment talks about the rights of people who are accused of crimes. For example, it says that a person cannot be put
Ivenika [448]
The fifth amendment also protects people from testifying against themselves.
8 0
3 years ago
Read 2 more answers
Sherry suffered a concussion in a car accident. she remembers driving down the road but she cannot remember how the accident hap
ioda
She suffers from Amnesia which is caused by brain damage
4 0
3 years ago
The Faroe Islands __________. A. were conquered by Polynesians who immigrated from Tahiti B. were settled by Norse and Scandinav
Naily [24]

The Faroe Islands B. were settled by Norse and Scandinavian peoples


4 0
3 years ago
Read 2 more answers
identify three surface process that are part of the rock cycle. Explain the role of each process in the cycle.
Galina-37 [17]

Answer:

PLEASE MARK ME BRAINLIEST!!!!!!!

Explanation:

There are three main types of rocks: sedimentary, igneous, and metamorphic. Each of these rocks are formed by physical changes—such as melting, cooling, eroding, compacting, or deforming—that are part of the rock cycle.

Sedimentary Rocks

Sedimentary rocks are formed from pieces of other existing rock or organic material. There are three different types of sedimentary rocks: clastic, organic (biological), and chemical. Clastic sedimentary rocks, like sandstone, form from clasts, or pieces of other rock. Organic sedimentary rocks, like coal, form from hard, biological materials like plants, shells, and bones that are compressed into rock.

The formation of clastic and organic rocks begins with the weathering, or breaking down, of the exposed rock into small fragments. Through the process of erosion, these fragments are removed from their source and transported by wind, water, ice, or biological activity to a new location. Once the sediment settles somewhere, and enough of it collects, the lowest layers become compacted so tightly that they form solid rock.

Chemical sedimentary rocks, like limestone, halite, and flint, form from chemical precipitation. A chemical precipitate is a chemical compound—for instance, calcium carbonate, salt, and silica—that forms when the solution it is dissolved in, usually water, evaporates and leaves the compound behind. This occurs as water travels through Earth’s crust, weathering the rock and dissolving some of its minerals, transporting it elsewhere. These dissolved minerals are precipitated when the water evaporates.

Metamorphic Rocks

Metamorphic rocks are rocks that have been changed from their original form by immense heat or pressure. Metamorphic rocks have two classes: foliated and nonfoliated. When a rock with flat or elongated minerals is put under immense pressure, the minerals line up in layers, creating foliation. Foliation is the aligning of elongated or platy minerals, like hornblende or mica, perpendicular to the direction of pressure that is applied. An example of this transformation can be seen with granite, an igneous rock. Granite contains long and platy minerals that are not initially aligned, but when enough pressure is added, those minerals shift to all point in the same direction while getting squeezed into flat sheets. When granite undergoes this process, like at a tectonic plate boundary, it turns into gneiss (pronounced “nice”).

Nonfoliated rocks are formed the same way, but they do not contain the minerals that tend to line up under pressure and thus do not have the layered appearance of foliated rocks. Sedimentary rocks like bituminous coal, limestone, and sandstone, given enough heat and pressure, can turn into nonfoliated metamorphic rocks like anthracite coal, marble, and quartzite. Nonfoliated rocks can also form by metamorphism, which happens when magma comes in contact with the surrounding rock.

Igneous Rocks

Igneous rocks (derived from the Latin word for fire) are formed when molten hot material cools and solidifies. Igneous rocks can also be made a couple of different ways. When they are formed inside of the earth, they are called intrusive, or plutonic, igneous rocks. If they are formed outside or on top of Earth’s crust, they are called extrusive, or volcanic, igneous rocks.

Granite and diorite are examples of common intrusive rocks. They have a coarse texture with large mineral grains, indicating that they spent thousands or millions of years cooling down inside the earth, a time course that allowed large mineral crystals to grow.

Alternatively, rocks like basalt and obsidian have very small grains and a relatively fine texture. This happens because when magma erupts into lava, it cools more quickly than it would if it stayed inside the earth, giving crystals less time to form. Obsidian cools into volcanic glass so quickly when ejected that the grains are impossible to see with the naked eye.

Extrusive igneous rocks can also have a vesicular, or “holey” texture. This happens when the ejected magma still has gases inside of it so when it cools, the gas bubbles are trapped and end up giving the rock a bubbly texture. An example of this would be pumice.

 

5 0
3 years ago
With regard to Motivation, the view that certain human behaviors are innate and due to evolutionary programming is known as: I__
puteri [66]

Answer:

follow me on Instagram for more answees

Explanation:

@fw_gerald

8 0
3 years ago
Other questions:
  • A developed state that is experiencing political stability is most likely to experience __________.
    11·2 answers
  • An "easy" class or quiz can mean different things to different people. this illustrates that communication is
    12·1 answer
  • Why is a lawmakers voting record important?
    8·1 answer
  • Grayson is a renowned investigative journalist who had uncovered several scams and corruption cases in the past. Known for his c
    9·1 answer
  • the most important reason why two countries that have the same GDP can have vastly different standards of living is because of
    7·1 answer
  • if anyone has ever read "Fast Fashion Denies Basic Human Rights." what is the claim? This is for language arts.
    14·2 answers
  • Which of the following statements best describes how Europeans have changed the land?
    11·2 answers
  • May you please help me on this one.
    8·2 answers
  • Examine the concept of the poor <br><br>​
    15·1 answer
  • When sociologists conduct research and test hypotheses, they do not necessarily need to collect new data all the time. they can
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!