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Vitek1552 [10]
2 years ago
10

Max tried an experiment in which he added red-dyed salt water to clear freshwater. He noticed that a lot of the red water sank b

elow the clear water. Which of the following statements explains why this happened?
a. Adding salt to water makes it more dense.
b. Adding salt to water makes it less dense.
c. Adding salt to water decreases its temperature.
d. Adding salt to water increases its temperature
Biology
1 answer:
Maksim231197 [3]2 years ago
7 0

Answer:

A

Explanation:

Adding salt to water causes its density to increase. Denser water will sink below less dense water.

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Which of the following would be categorized as a cultural ecosystem service of forests?
Lubov Fominskaja [6]

Answer:

Recreation ans scenic areas for tourism.

Explanation:

  • As the ecosystem provides a certain amount of services as habitat, healthy soil and clean air, freshwater nutrient cycle s and human goods like culture, recreation, and health. All these are benefits that humans freely gain from the natural ecosystem either be agro, forest aquatic or grasslands, etc.
8 0
2 years ago
Which statements describe freshwater sources? Check all that apply.
vekshin1

"Rainwater can replace or replenish freshwater sources" and "precipitation, such as rainwater, is a source of freshwater on Earth" statements describe freshwater sources

<u>Explanation:</u>

Rainwater a source of pure distilled water, evaporated by the sun. When it falls it comes in contact of air and land. when ground soaks the water it becomes mineral water. And it is safe for drinking.

All the freshwater sources are result of precipitation from the earth surface,in various form i.e rain,mist,snow.  Freshwater falling as rain have materials dissolved from atmosphere in it,sea and the land over which the clouds has travelled.

7 0
2 years ago
Read 2 more answers
How does a cow use the sugar molecules stored in the grass it eats?
11111nata11111 [884]

ANSWER: A living organism intakes food, it breaks down into mostly water and large organic molecules. These large organic molecules are Fat, Proteins, Glucose, Starch and Cellulose. These molecules are still not usable by the cells so the body breaks these large polymers into small monomers.

In cow's muscles, protein muscles are built by tapping 4 amino acid monomers. Fat muscles are built by tapping 3 fatty acid monomers and 1 glycerol molecule.

Cows use glucose molecules to mix with oxygen to release chemical energy in cellular respiration. Cows can make fat molecules and glucose molecules because fatty acids and glycerols are made up of same atoms, C, H and O.

3 0
1 year ago
Mr. Helms was admitted to the hospital with chest pains and shortness of breath. His wife was panicked since her 72-year-old hus
Lynna [10]

Answer:

Explanation:

1- the purpose of blood flow-circulatory system- is to convey  Oxygenated blood, oxygen bonded with haemoglobin in the RBC with Nutrients - and distributed these through the arteries  and capillaries  away from the heart,  to reach the cells and tissues, and transported the wastes of theses cells and tissues , with C02 through the veins back to the heart and the kidney.

2. During diastole,deoxygented blood from the inferior and superior vena cavae entering the R.atrium, passes through the tricuspid valve into the Right Ventricle. Simultaneously, oxygenated blood returning through the pulmonary veins enters the left Atrium,emptied  through the bicuspid valve into the Left.Ventricle.

During systole, the two ventricles contracts. The Right ventricle contracts, the pressure of the blood forces  the tricuspid valve to close,and therefore de -oxygenated blood pushes the pulmonary  valves to open and blood passes through the pulmonary artery to reach the lungs where exchanges of oxygen with carbon dioxide occurs.The blood is now oxygenated and returns to the left atrium via pulmonary veins.

Simultaneously, the left ventricle contracts,the oxygenated blood it contains forced the bicuspid valve to close so that blood is  forced through the aortic valve  to empty into the aorta into  the systemic circulation,branches of the carotid artery supplies the heart from the aorta.

The Whole cycle continues.

8 0
2 years ago
Imagine that researchers publish a study that shows the following positive correlation: College students who spend more money on
wariber [46]

Answer:

Option (c).

Explanation:

Correlation may be defined as the statistical relationship used to explain the relation between two things. Two types of correlation are positive correlation and negative correlation.

The college students with more money and new clothes will help to make new friends as money can be used for more party and fun. The wealthy students has direct relation with new friends as they have more money to spend and enjoy with new friends.

Thus, the correct answer is option (c).

6 0
2 years ago
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