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Vsevolod [243]
3 years ago
11

The amount of matter in a given amount of space is known as the

Biology
1 answer:
Lostsunrise [7]3 years ago
6 0

<u>Density</u> – The amount of matter in a given space. In scientific terms, density is the amount of mass in a unit of volume.

or

The amount of matter in a given amount of space is known as the <u>Density.</u>

hope it helps you

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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
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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

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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).

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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.

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