Rock is a combination of two or more minerals, and it does not possess any specific chemical composition. It is present naturally in the environment. Some examples of rocks are limestone, granite, etc.,Limestone may contain minerals like calcite and aragonite. Each mineral has a specific chemical composition with a well defined crystalline structure.
Therefore, the correct option would be a. rock as rock is the naturally occurring solid mass made up of different types of minerals.
Japan is working to change to sustainable energy sources that can replace nuclear energy sources.
What is Nuclear energy?
Utilizing nuclear reactions to generate electricity is known as nuclear power. Nuclear fission, nuclear decay, and nuclear fusion reactions can all provide nuclear energy. Currently, nuclear power plants use the fission of uranium and plutonium to generate the great majority of the world's electricity from nuclear sources.
The only significant, carbon-free electricity source that the nation can extensively expand to produce significant amounts of electricity is nuclear energy. When fossil fuels are burned to produce the same amount of electricity, nuclear power plants avoid producing a sizable amount of emissions.
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The surface area of small rocks is smaller than the surface area of large rocks.
Answer:
Please show a file so I can answer your question or tell me which experiment.
Explanation:
Definition:The control group (sometimes called a comparison group) is used in an experiment as a way to ensure that your experiment actually works. It's a way to make sure that the treatment you are giving is causing the experimental results, and not something outside the experiment.