Biology, 25.09.2020 06:01 janellylancon623
Jenny was worried about how some pollutants in a lake near her home were
affecting the levels of dissolved oxygen in the water, so she designed the
following experiment. First she collected five 10-gallon aquariums and filled each
with water from her tap. Then, she tested the initial oxygen level of the tap water.
Next, she put a tablespoon of different pollutants, including gasoline, cooking oil,
paint, and lawn fertilizer, in each of four of the tanks. She stirred those four tanks
for 1 minute each to help the pollutant dissolve or spread out in the tank. Lastly,
she tested the oxygen level in each tank once every hour and recorded her
results in a table. What is the independent variable in Jenny's experiment? *
the amount of pollutant put in each tank
Ο Ο Ο
initial oxygen level in the tank without the pollutant
pollutant in each tank
levels of oxygen in each tank
Answers: 3
Biology, 21.06.2019 18:00
Which events are likely to be catastrophic to an ecosystem? select the three correct answers.a-hurricane.b-steady population growth.c-seasonal flooding.d-introducing of an aggressive invasive species.e-tsunami.
Answers: 1
Biology, 22.06.2019 03:00
Which set of characteristics best describes sedimentary rock? a) largest type of rock, made of organic matter, hardest type of rock b) often contains layers, forms near sources of water, contains fossils c) least abundant type of rock, made of other rocks, made mostly of minerals d) most abundant type in earth's crust, made of magma/lava, contains no fossils
Answers: 2
Biology, 22.06.2019 18:30
In two sentences explain the differences of neutrophil and macrophage
Answers: 1
Jenny was worried about how some pollutants in a lake near her home were
affecting the levels of di...
Physics, 18.01.2022 20:10
Social Studies, 18.01.2022 20:10
Mathematics, 18.01.2022 20:10
Physics, 18.01.2022 20:10
Mathematics, 18.01.2022 20:10
Mathematics, 18.01.2022 20:10
Business, 18.01.2022 20:10
Mathematics, 18.01.2022 20:10
Mathematics, 18.01.2022 20:20