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harkovskaia [24]
3 years ago
13

What is a Degree Heating Week?

Biology
1 answer:
Musya8 [376]3 years ago
7 0

Answer:

Degree Heating Week (DHW) shows how much heat stress has accumulated in an area over the past 12 weeks (3 months) by adding up any temperature exceeding the bleaching threshold during that time period.

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The city of Los Angeles wants to know if there is a connection between physical fitness and air pollution. Fifty volunteers from
zheka24 [161]

Answer:

Control group: volunteer stationary bike riders in a pollution-free chamber

Experimental group: volunteer stationary bike riders in a chamber filled with air pollutants common to Los Angeles

Independent variable: exposure to air pollution

Dependent variable: The heart rates (physical fitness) of the volunteer riders.

Explanation:

In a scientific experiment, data is compared between the control group and experimental group to ascertain the effect of the independent variable on the dependent variable. A control group is the group in an experiment that is not treated with the independent variable i.e. the independent variable is controlled while the experimental group is the group that is treated with an independent variable.

N.B: The independent variable is the variable controlled by the experimenter in order to influence the dependent variable (measurable outcome).

In this experiment, the independent variable is the AIR POLLUTION the volunteer riders are exposed to while the dependent variable is the PHYSICAL FITNESS/ HEART RATES of the volunteer riders, which is dependent on the exposure to air pollution (independent variable).

The control group in this experiment is the volunteer riders placed in a POLLUTION-FREE CHAMBER where the independent variable cannot influence or have any effect on the measurable variable (dependent). The experimental group is the volunteer riders placed in a CHAMBER FILLED WITH AIR POLLUTANTS. The independent variable (air pollution) has been changed in the experimental group.

4 0
3 years ago
Which of these infections is also referred to as Valley fever?
lorasvet [3.4K]

Answer:

coccidioidomycosis

Explanation:

Valley fever is also referred as coccidioidomycosis. It is an acute infection caused by a fungi called coccidioides. The fungi present in the soil in a particular region. The spores of the fungi spread into air through wind, construction work or farming. Through breathing fungi reached to the lungs causing valley fever. The symptoms of coccidioidomycosis includes fever, pain in chest and coughing. Mild valley fever get cured in due course of time by itself but in severe cases antifungal medicines are prescribed by the physicians.  

5 0
4 years ago
How do I write a CER paragraph? I need one for Science.
user100 [1]

Well when writing a CER first you need to state your claim after stating your claim you need to support your claim with evidence from your sources and after that you need to give reasons on how your evidence supports your claim

7 0
3 years ago
Which developmental milestone must be reached before an infant experiences separation anxiety? (a) imprinting (b) theory of mind
Anika [276]
Object permanence is the developmental milestone that must be reached before an infant experiences separation anxiety.  It is used to describe the ability of a child to know that objects continue to exist despite the fact that they can no longer be perceived that is , seen or heard, touched, smelled, or sensed in any way. This milestone is developed through touching and handling objects by the infants.
6 0
3 years ago
Two species of meadowlarks have different mating calls that lead to reproductive isolation. What type of isolation does this exa
77julia77 [94]
Hi there!

The example of the meadowlarks is an example of behavioral isolation. This is because the mating call is a behavior the birds exhibit. This helps the birds to find their correct mate because though the birds look similar, they are not able to produce offspring.

Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
6 0
3 years ago
Read 2 more answers
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