A creep is a slow downward progression of rock and soil on a slope of terrain.
A rockfall is a mass of loose rocks that fall down a slope.
A landslide is a mass of earth and/or rocks that have collapsed from a mountain or cliff.
A mudflow is an avalanche of big amounts mud.
Answer: 1. recollapsing universe
4. critical universe
3. coasting universe
2. accelerating universe
Explanation:
The universe is continually growing and galaxies are moving apart relative to one another.
These four models foresee the expansion and possible contraction of the universe.
Recollapsing universe: this model predicts that galaxies will stop growing apart and start getting closer to one another. It predicts that there is enough density to stop the growth of the universe in the future.
Critical universe: the universe has the same density as the critical density. This is the difference between the density the universe requires to stop and that of a universe with too little density to ever stop expanding
.
Coasting universe: has enough density to enable galaxies to keep growing apart
, in essence, less than the critical density.
Accelerating universe: this model explains that the distance of far-off galaxies is growing exponentially from an observer over time.
A good way of storing personal flotation Device is through the following ways
- store flotation devices in a cool dry area with adequate ventilation.
- Avoid placing them in direct sunlight, as UV rays could prove harmful to them.
- Hang them up whenever possible rather than placing them on a shelf or the bottom of a locker
<h3>What is Personal Foltation Device</h3>
A personal flotation device is a flotation device in the form of a vest or suite that is worn by a user to prevent the wearer from drowning in a body of water.
It is necessary to store a PFD in the right condition in order not to destroy it.
learn more about a PFD at
brainly.com/question/9172852
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