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ivanzaharov [21]
2 years ago
13

7. How did scientists determine the age of the ocean floor?

Biology
2 answers:
DiKsa [7]2 years ago
8 0
A. Just did this question and got it right
lara31 [8.8K]2 years ago
6 0

Answer:

a. By Calculating magnetic reversals.

Explanation:

They determine the age of the ocean floor by examining magnetic fields in the planet Earth.

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tatuchka [14]
<span>Advancements in medicine have increased the life expectancy of humans</span>
3 0
2 years ago
What is the difference between independent and dependent variables
trasher [3.6K]

The two main variables in an experiment are the independent and dependent variable.

An independent variable is the variable that is changed or controlled in a scientific experiment to test the effects on the dependent variable.

A dependent variable is the variable being tested and measured in a scientific experiment.

The dependent variable is 'dependent' on the independent variable. As the experimenter changes the independent variable, the effect on the dependent variable is observed and recorded.

For example, a scientist wants to see if the brightness of light has any effect on a moth being attracted to the light. The brightness of the light is controlled by the scientist. This would be the independent variable. How the moth reacts to the different light levels (distance to light source) would be the dependent variable.

When results are plotted in graphs, the convention is to use the independent variable as the x-axis and the dependent variable as the y-axis.

4 0
3 years ago
Rank the buoyant forces supplied by the atmosphere on the following, from greatest to least: a. An elephant b. A helium-filled p
blsea [12.9K]

Answer:

a >c > b.

Explanation:

The buoyant force may be defined as the force that mainly opposes the immersed object weight. The buoyant force is greater at the bottom and acts on upward direction.

The buoyant force depend on the object of the volume and directly proportional to the volume. The buoyant force of elephant is highest as it has highest volume than skydiver and balloon has least volume and so the least buoyant force.

Thus, the answer is a >c > b.

3 0
3 years ago
PLEASE HELP ME!!! I NEED THIS SO I CAN PASS MY CLASS AND I ONLY HAVE TEN MINS LEFT!!!! I WILL MARK BRAINILIST!!!
Verdich [7]

Answer:

Coal.

Explanation:

Steam power plant has the lowest efficiency in electricity production which can only be run with the use of fossil fuels such as coal. The efficiency of this power plant is the lowest because large amount of coal is converted into smoke and other gases and very less amount of coal into heat energy. This coal is used to produce heat energy which can be used in the heating of water to produce steam. This steam is used to move turbines which turn mechanical energy into electric energy.

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2 years ago
When you climb a rope you change blank energy into blank energy
mash [69]
Chemical energy into  kinetic energy
3 0
3 years ago
Read 2 more answers
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