Answer:
all are true and i fact checked
Explanation:
Answer:
Conduct an experiment.
Explanation:
Any scientific hypothesis or theory requires the proper step and the procedure to explain the particular points about the theory. Any statement made in the science needs the experimental proof.
The scientific experiments includes the different steps used for the validation of any hypothesis. The experiments can explain the main cause of any phenomena and the factors that might affect the experiments. The experimental studies are performed by the scientists.
Thus, the correct answer is option (e).
<h3><u>Answer;</u></h3>
A. Gas exchanges takes place by diffusion.
B. It is an open system.
<h3><u>Explanation</u>;</h3>
- Most molluscs and arthropods have an open type of circulatory system.
- Open circulatory systems pump blood into a hemocoel with the blood diffusing back to the circulatory system between cells.
- Blood is pumped by a heart into the body cavities, where tissues are surrounded by the blood.
Answer:
B. Earth rotates on its own axis and revolves around the Sun.
Explanation:
The earth moves not only in one way but in two ways. It revolves around its axis and revolves around the Sun.
We do not notice it because we are on Earth and we turn together with it.
When the Earth revolves around its (imagined) axis, we call such a movement a rotation, and when it revolves around the Sun - a revolution.
