Animals can be classified into two main groups:vertebrates and invertebrates<span>. The main difference between </span>vertebrates and invertebrates<span> is that</span>invertebrates<span>, like insects and flatworms, </span>do<span> not</span>have<span> a backbone or a spinal column. Examples of</span>vertebrates<span> include humans, birds, and snakes. hope this helped</span>
Answer:
A. Making an observation
Explanation:
Before you can communicate findings, you first need to have findings. And before you can test a hypothesis, you first need to come up with a hypothesis, which can be done by first making an observation.
Salt
a decrease in temperature and an increasue in salinity
5. Because of rain and oxygen, if a set of tools is left outdoors in the rain for a long time, it will rust.
6. Yes, I believe it is possible for any of the earth materials scenes to be affected by both mechanical and Chemical weathering, but I am more positive about #5.
There are many different types of diffusion that occur in the body however in general they all are the process of a substance moving from an area of high concentration of that substance to and area of low concentration of that substance across a semi-permeable membrane such as the plasma membrane of cells. An example of where this happens is where Oxygen diffuses out of the blood and into the cells of the body lining the capillaries to provide oxygen for respiration.<span />
