It was caused by a mix of different scenarios. Rome was constantly attacked by Barbarian tribes; they were over-expanded, which made it really hard for them to keep their entire empire under control; they had a lot of economic problems and relied too much on slave labor; and they spent way too much money on their military, just to name a few factors.
Verticle erosion/downcutting deepens the channel
hope it helps!
Answer:
A. moving
B. hot
C. cold
D. thermometer.
Explanation:
An atom can be defined as the smallest unit comprising of matter that forms all chemical elements. Thus, atoms are basically the building blocks of matters and as such determines or defines the structure of a chemical element.
Generally, atoms are typically made up of three distinct particles and these are protons, neutrons and electrons.
All chemical substances comprises of small particles, which may either be atoms or molecules, that are constantly moving or in a state of motion.
Temperature can be defined as a measure of the degree of coldness or hotness of a physical object. It is measured with a thermometer and its units are Celsius (°C), Kelvin (K) and Fahrenheit (°F).
Generally, the temperature of a body or substance is usually measured with a thermometer. It is a thin glass having a bulb on one of its end and typically contains either colored alcohol or mercury.
Answer:
The study of the earth's ecosystems is also part of the physical systems element. This element includes the ways that human actions modify the physical environment. It also considers the affect that physical systems, such as landforms and weather, have on human systems.
Answer:
B. The peak of the secondary immune response to antigen X
Explanation:
(See attachment for missing details)
The secondary immune response takes place when a person is repeatedly exposed to the same antigen. Getting to this stage, the immunological memory would have been setup and the immune system will immediately proceed to making antibodies.
From the attached, it takes the primary immune system 28 days to get to its peak and the secondary immune response is stronger than the primary immune response
