# SS

A scientist was studying the effects of oil contamination on ocean seaweed. He thought that oil runoff from storm drains would keep seaweed from growing normally so he decided to do an experiment. He filled two tanks of equal size with water and monitored the dissolved oxygen and and temperature in each to be sure they were equal. He introduces some motor oil into one tank and then measured the growth of seaweed in the tank. In the tank with no oil, the average growth was 2.7cm. The average growth of the seaweed in the tank with the oil was 2.37cm. Based on this experiment:
3. Identify the independent variable, the dependent variable, and the experimental controls

Answer: independent variable is motor oil
Dependent variable is growth of seaweed
Experimental controls:
Tanks, dissolved oxygen, and temperature

1. 👍
2. 👎
3. 👁
1. You are correct.

1. 👍
2. 👎

## Similar Questions

1. ### Fluid Mechanics

The kinematic viscosity of oil of specific gravity .8 is .0005 .This oil is used for lubrication of shaft of diameter .4 m and rotates at 190 rpm. Calculate the power lost in the bearing for a sleeve length of 90mm. The thickness

2. ### Physics

1. A cylindrical disk of wood weighing 45.0N and having a diameter of 30.0 cm floats on a cylinder of oil of density 0.850 g/cm3. The cylinder of oil is 75.0 cm deep and has the same diameter of the wood. (a) What is the gauge

3. ### SOCIAL STUDIES

WHICH OF THE FOLLOWING STATEMENTS SUPPORTED BY THE INFORMATION IN THE MAP 1] AUSTRASLIA IS SELF-SUPPORTING IN OIL.2]AFRICA TRADES OIL ONLY WITH SOUTH AMRICA.3] THE SOVIET UNION HAS TRADE ROUTES WITH EVERY MAJOR CONTINENT.4] ALL OF

4. ### History

If humanity has passed the point where the oil supply is declining, which suggests the most practical response? start hoarding oil in underground tanks as a hedge against a future without oil increase funding for government

1. ### Math

A fuel oil tank is an upright cylinder, buried so that its circular top 12 feet beneath ground level. The tank has a radius of 6 feet and is 18 feet high, although the current oil level is only 13 feet deep. Calculate the work

2. ### Math

Tamara needs to buy motor oil to fill the 3 empty cylindrical barrels at her oil service center. Each barrel is 7ft deep and has a radius 4ft. What is the volume of oil needed? Use 3.14 for ð.

3. ### history

which describes the most accurate reason why oil wealth affects the stability of the middle east? a. wealthier middle eastern countries are able to use their oil profits to fund armies for self-defense. b. middle eastern nations

4. ### Math

Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% chance that the land has oil. Jason decides to test the land for oil. He buys a kit that claims to have an 80% accuracy rate of

1. ### history

Which describes the relationship between oil-producing Middle Eastern nations and the consumer states that consume their petroleum? Consumer states often are dependent on Mideast oil producers, but potential ties to terrorist

2. ### American History

how does the foreign oil situation affect Americans today? Oil dependency is a huge issue in today's world. Between oil fracking destroying our environment, creating earthquakes, and oil spills destroying our oceans and potential

3. ### Calculus

An oil tank in the shape of a right circular cylinder, with height 30 meters and a radius of 5 meters is two-thirds full of oil. How much work is required to pump all of the oil over the top of the tank? (The density of oil is 820

4. ### History

Which describes the relationship between oil-producing Middle Eastern nations and the consumer states that consume their petroleum? Oil-producing nations realize their economic interdependence with the consumer states and work