Answer:
In primary succession, newly exposed or newly formed rock is colonized by living things for the first time. In secondary succession, an area that was previously occupied by living things is disturbed, then re-colonized following the disturbance.
Answer:
Barbed wire was invented and patented by Joseph Glidden in 1874 and had a major impact on the cattle industry of the Western U.S. Accustomed
Explanation:
Answer:
D. Valve.
Explanation:
These allow blood to flow through without flowing back.
Answer:
Ball-and-stick models show the bonds between atoms, but not the relative sizes of the atoms. Space-filling models show the relative sizes of atoms, but not the bonds between atoms.
Explanation:
Chemically, it is hard to understand the complex structure and shapes of the atoms and molecules. For better understanding, scientists have different models that help show the molecules in different prospects. For example, ball-and-stick and space-filling models.
The ball-and-stick model shows the three-dimensional arrangement of atoms and bonds. This model has a limitation that the identification of atoms requires a key to color representations. This model also does not show the relative size of atoms.
The space-filling model shows a three-dimensional arrangement as well as the relative size between atoms. Bonding between atoms can sometimes be difficult to distinguish in this model.
Answer:
D. The atoms move faster, increasing the distance between them before breaking some of their bonds.
Explanation:
a liquid is the the state of matter where the atoms can move freely so to get there it has to expand and then liquify.
