Answer:
The correct answer is option C) "More than one variable is being tested".
Explanation:
One of the basis of scientific experimentation is to test one variable at the time in order to make sure that the response that is being obtained is the result of that variable and not another one that is not taking into account. In this case, the student is making the mistake of assessing two variables at the same time: the use of detergent and placing the plant in the sun or in the shade. At the end of the experiment the student will not know if the response is the effect of the detergent, the exposure to the sun or a combination of both.
Answer:
Once a star has reached the main-sequence stage of its life, it derives its energy almost entirely from the conversion of hydrogen to helium via the process of nuclear fusion in its core
Answer:
A. Hippocampus
Explanation:
The Hippocampus in the limbic system is important for sorting out and storing in new information. This is also responsible for connecting memories to one another by getting different senses and emotions in place.
Answer:
mechanical weathering and chemical weathering
Explanation:
Weathering is the physical disintegration and chemical decomposition of rocks to form sediments and soils.
Both mechanical and chemical weathering are responsible for the process.
Mountain ranges are worn down with time due to the action of weathering.
- Rocks can be broken down over time with prolonged action of mechanical weathering via thermal expansion and contraction, alternate wetting and drying, pressure release etc.
- Chemical weathering usually by the action of water dissolves rocks.