Convection occurs in fluids (so both liquids and gases, as well as rheids) and is the concerted, collective movement of groups or aggregates of molecules within the above through advection or diffusion or both at the same time. Convection can never take place in solids and is only specific to fluids.
Answer:
The correct answer will be-
Case I- option-B
Case-II-option-B
Explanation:
A scientific method is the best procedural approach to explain the natural phenomenon. The method includes various steps which begin with the making the observation. The observation leads to the asking the scientific questions which could be answered by proposing a hypothesis.
The hypothesis must be tested through experiments which could prove and disprove the hypothesis and can answer the natural phenomenon.
<u>Case-I</u>
In the given situation of the question in which a person notices or observes the fields of grass and grass and native flower. Since the researcher notices the fields, they are performing the first step of the method that is "making an observation" and thus Option-B is the correct answer.
<u>Case-II</u>
In the situation, which discusses the number of birds in the fields shows the "dependent variables". The dependent variable is the parameter which is studied in the experiments. Since in the given conditions the number of birds is being studied, therefore, Option-B is the correct answer.
Answer:
B
Explanation:
Natural Resource is a source of energy that doesn't need any action from humans. The sun doesn't need the help of humans, therefore it is a natural resource
Scientists want to place a telescope on the moon to improve their view of distant planets. The telescope weighs 200 pounds on earth. The weight of the telescope when it reaches the moon as the weight of the telescope will be equal to its mass.
If you're trying to view faint deep-sky items like nebulas and galaxies then you'll need a reflector telescope while a refractor telescope is higher suited for perspectives inside our very own galaxy consisting of the moon and other planets.
A telescope is an optical tool using lenses, curved mirrors, or a mixture of each to look at remote objects, or diverse gadgets used to observe distant gadgets by means of their emission, absorption, or mirrored image of electromagnetic radiation.
The Celestron encourage 100AZ is a top, top choice of telescope for beginners. It gives remarkable ease of setup and use, and it comes with a much greater choice of add-ons than most other starter telescope bundles - it's the entire package for the ones trying their hand at astronomy.
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It can be one of two things.
First, it can be due to global warming.
Second, it can be due to the rotation of the sun. When the sun rotates, it can change it latitude causing it to hit at different points onto different areas of the world.
