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2 years ago

The composition of the sun is best described as-

Biology

1 answer:

tester [92]2 years ago

4 0

Answer:

75 percent of hydrogen, and 25 percent of helium.

Explanation:

The Sun is mostly composed of helium (He) and hydrogen (H). It is a big ball of gases that are converting into solar energy in the core of the Sun.

The Sun is the biggest star, composed of hot gases and it is located in the center of the solar system.

The temperature of the Sun is 5.726 degrees of Celsius. The percentage of hydrogen in the un is 75 percent, and helium 25 percent.

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The mechanism that insulates Earth from the deep freeze of space?

Kruka [31]

the Ozone Layer is the answer

3 0

3 years ago

Read 2 more answers

) consider the trait of courage. describe the advantages and limitations of obtaining informant report data for this trait.

mariarad [96]

The advantages and limitations of obtaining informant report data for the courage trait are;
Advantages include;
Large amount of information
Definitional truth based on the observed acts of courage.
Limitations on the other hand include;
Very little behavioral data,
Error; much more likely to remember acts of courage than non-courageous acts.

8 0

3 years ago

41:07

Dominik [7]

Answer:C

Explanation:BECAUSE I SAID SO

6 0

3 years ago

masteringbio JFor each of the studies described below, indicate if it is hypothesis driven and whether the scientist is employin

juin [17]

Incomplete question. The remaining part of the question read;

Words in the left column:

Yes
No
Observational
Manipulative

1. A physiologist incubates eggs in the lab at a range of temperatures to see what temperatures produce males and what temperatures produce females.

2. A biologist predicts that shade might influence ground temperature, and therefore turtle sex ratios. He records the sex ratio of turtle hatchlings in shaded and unshaded regions

3. An ecologist predicts turtles grow larger when no predators are around. She places turtles in an experimental pond system where half the ponds have predators and half the ponds have had the predators removed.

4. A climatologist predicts that concentration of CO2 in a city will be negatively correlated with the amount of wind in that city. He collects data and looks at the amount of CO2 in a city as a function of the wind speed in the city.

5. A sociologist conducts a survey in Hawaii to describe people's attitudes about global climate change.

6. A scientist determines the average wind speed, and variation in the amount of wind, in a number of locations to see which locations would be most suitable for wind turbines

Answer/Explanation:

1. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

We can make this conclusion here that the physiologists' research is hypothesis-driven since we are told he wanted to "see what temperatures produce males and what temperatures produce females." In other words, he wanted to know whether the temperature used in incubators can influence the sex of an egg by means of observation.

2. Hypothesis-driven? Yes!

Observational or Manipulative? Observation.

3. Hypothesis-driven? Yes!

Observational or Manipulative? Manipulative.

We can make the conclusion that is the ecologist used the manipulative method in her research since she decided to place the turtles in two different types of ponds; one where half the ponds have predators while in the other the pond the predators have been removed. In other words, she manipulated the independent variables.

4. Hypothesis-driven? Yes!

Observational or Manipulative? Observational.

Note, the use of the word, "predicts" in most instances underscores the tone of hypothesis-driven research, hence we can say Yes! And remember, we are told the researcher "collects data", meaning he is merely observing differences that occur naturally.

5. Hypothesis-driven? No!

Observational or Manipulative? Observational.

6. Hypothesis-driven? No!

Observational or Manipulative? Observational.

5 0

3 years ago

Lupus, a condition in which the body attacks its own cells, is an example of

riadik2000 [5.3K]

Answer:

Option 4, an autoimmune disorder, is the correct answer.

Explanation:

An autoimmune disorder can be described as a disorder in which the immune cells of a body attack the own cells of a body.

Lupus can be described as an autoimmune disease which is long termed. In this disorder, a person's immune system attacks its own healthy cells. The immune system is unable to differentiate between the pathogenic cells and the healthy cells of the body. As a result, tissue damage is caused.

5 0

3 years ago