Liquid water evaporates from lakes when heated by the sun.
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.
Answer:
B. more cells than smaller organisms
Explanation:
Animals and plants are multi-cellular eukaryotic creatures. Eukaryotes tend to be bigger than prokaryotes, but, more importantly, eukaryote means multiple cells, and prokaryote is one.
Ionic bonds involve the gaining and losing of valence electrons between atoms, while covalent bonds involve the sharing of valence electrons between atoms
It is a method in the textile industry where two sets of threads are interwoven at the right-angles to form a cloth
<u>Explanation:</u>
<u>1.100% cotton:</u>
- open weave.
- easily distorted with water and washing.
- stretches in one direction only.
<u>2. 100% wool:</u>
- very strong.
- dense and compact.
- different faces.
- diagonal design.
- soft and pliable.
<u>3. 100% Nylon Rope:</u>
- Not durable.
- Tends to snag
- The shiny surface.
- high light reflectance.
- light fiction with other garments.
<u>4. 100% Spandex Nylon:</u>
- Not durable.
- Tends to snag and break during wear.
- light fiction with other garments.
<u>5. 100% cotton blend</u>
- easily distorted with water and washing.
