1. 4
2. carbon
3. Bond
Answer:
Big bang describes an ever expanding model of the universe.
Steady state theory explains a universe that always existed in the same state.
Explanation:
The two theories Big bang and Steady state are two of the theories that explain the origin of the universe in two different ways.
The Big bang model states that the universe is ever expanding and began from a singularity. It says that from that time universe is ever expanding creating new clusters of galaxies.
This was proved using mathematical formulae and models .
Steady state theory states that the density of matter remains unchanged due to the creation of matter. Observable universe is the same at any point of time is its summary.
Answer:
The big bang is the theory that describes how the universe emerges, it tells us that in the beginning all the space was contained in a space that was too small, and from there, it expanded rapidly until it reached the state of the universe that we know today, and that continues in expansion.
The theory of the oscillating universe describes a universe that begins and ends cyclically, it beging with something like the big bang, end ends in what is known as the big crunch, and so on. It says that the universe did not have a beginning but has always been restarting.
The theory of the static or steady state universe describes a type of universe uniform in space and time. And in which the universe has always remained the same regardless of where it is observed, wich is different from the other theories since the big bang theory says the universe had a beginning. In this theory it is claimed that the universe is homogeneous and isotropic. This theory is not very popular today.
C 1500 J
D 15000 J
B). Does not dissolve in water
C). Forms crystal structures
D). Does not conduct electricity
Answer:
The answer is D
Explanation:
Ionic compounds have high melting and boiling points.They can dissolve in water.And they donot form crystal structurs by dissolving.And they donot conduct electricity.
Table salt (an ionic compound) forms crystal structures, similar to other ionic compounds, due to the strong electrostatic forces holding its ions in a well-organized lattice. So the correct option is C.
The property of table salt, which is also a property of other ionic compounds, is that it forms crystal structures. Table salt, like all ionic solids, exhibits a crystalline structure because its ions are held together by strong electrostatic forces of attraction in a rigid and well-organized lattice. In contrast, ionic compounds typically have high melting points, dissolve in water, and can conduct electricity when dissolved or molten because ions are free to move, allowing for the flow of electric charge.
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Which of the following are valid names for the equinoxes?
There is a Spring equinox (March in the northern hemisphere), and a Fall equinox (September).