Question

the big bang theory there is a lot of evidence that the universe started with a big bang. the big bang theory is the most accepted explanation of how the universe was created. there is evidence the universe is still expanding. if we start at the present and go back into the past, the universe must have been smaller. what is the result of a shrinking universe? a point! the universe began about 13.7 billion years ago. everything in the universe was squeezed into a point. it was all in a single hot, chaotic mass. then a huge explosion—a big bang— took place. the big bang caused the universe to start expanding (fast). all the matter and energy, even space itself, came out of this explosion. after the big bang in the moments after the big bang, the universe was extremely hot and dense. the universe expanded and it became less dense. it began to cool. after only a few seconds, protons, neutrons, and electrons could form. after a few minutes, hydrogen formed. there was so much energy that nuclear fusion began. this created helium. matter was held together by gravity. eventually stars formed. then, galaxies were formed. there are now trillions of stars, billions of galaxies, and other structures that form the visible universe. reading check word bank big bang expanded galaxies helium gravity hot hydrogen neutrons point stars cool fusion 13.7 billion years ago, the universe was squeezed into a single ____ a huge explosion known as the __ after the big bang, the universe was __ and dense. the universe __ and it became less dense and began to __ seconds later, protons, __ and electrons form. nuclear __ begins and __ is created. matter was held together by __ after a few minutes, ____ formed.

Explanation:

To solve the fill - in - the - blanks related to the Big Bang Theory, we analyze the context and the word bank:

1. "13.7 billion years ago, the universe was squeezed into a single ______"

From the text "Everything in the universe was squeezed into a point", we know that the word to fill in is "point".

2. "A huge explosion known as the ______"

The text says "a huge explosion—a big bang—took place", so we fill in "big bang".

3. "After the Big Bang, the universe was ______ and dense."

According to "the Universe was extremely hot and dense", the word here is "hot".

4. "The universe ____ and it became less dense and began to ____"

From "the Universe expanded and it became less dense. It began to cool" and "the universe started expanding", we fill in "expanded" and "cool" respectively.

5. "Seconds later, protons, ______ and electrons form."

The text has "protons, neutrons, and electrons could form", so we fill in "neutrons".

6. "After a few minutes, ______ formed."

From "hydrogen formed. There was so much energy that nuclear (fusion) began. This created helium", we first fill in "hydrogen" and then "helium" (for the next blank related to what is created). Wait, let's re - check the blanks:

Looking at the "Nuclear ____ begins and ____ is created" blank: From "nuclear (fusion) began. This created helium", we fill in "fusion" and "helium".

7. "Matter was held together by ______"

The text says "Matter was held together by gravity", so we fill in "gravity".

8. Then for the "______ form" blanks (the last two):

From "Eventually stars formed. Then, galaxies were formed. There are now trillions of stars, billions of galaxies, and other structures that form the visible Universe", we can fill in "stars" and "galaxies" (in the appropriate blanks).

Final Answers (filling the blanks in order):

1. point
2. big bang
3. hot
4. expanded; cool
5. neutrons
6. hydrogen; helium (for the nuclear and creation blanks)
7. gravity
8. stars; galaxies (for the final form blanks)

(Note: The exact order of filling may depend on the exact layout of the blanks in the original worksheet, but the above words are derived from the text about the Big Bang Theory.)

Answer:

To solve the fill - in - the - blanks related to the Big Bang Theory, we analyze the context and the word bank:

1. "13.7 billion years ago, the universe was squeezed into a single ______"

From the text "Everything in the universe was squeezed into a point", we know that the word to fill in is "point".

2. "A huge explosion known as the ______"

The text says "a huge explosion—a big bang—took place", so we fill in "big bang".

3. "After the Big Bang, the universe was ______ and dense."

According to "the Universe was extremely hot and dense", the word here is "hot".

4. "The universe ____ and it became less dense and began to ____"

From "the Universe expanded and it became less dense. It began to cool" and "the universe started expanding", we fill in "expanded" and "cool" respectively.

5. "Seconds later, protons, ______ and electrons form."

The text has "protons, neutrons, and electrons could form", so we fill in "neutrons".

6. "After a few minutes, ______ formed."

From "hydrogen formed. There was so much energy that nuclear (fusion) began. This created helium", we first fill in "hydrogen" and then "helium" (for the next blank related to what is created). Wait, let's re - check the blanks:

Looking at the "Nuclear ____ begins and ____ is created" blank: From "nuclear (fusion) began. This created helium", we fill in "fusion" and "helium".

7. "Matter was held together by ______"

The text says "Matter was held together by gravity", so we fill in "gravity".

8. Then for the "______ form" blanks (the last two):

From "Eventually stars formed. Then, galaxies were formed. There are now trillions of stars, billions of galaxies, and other structures that form the visible Universe", we can fill in "stars" and "galaxies" (in the appropriate blanks).

Final Answers (filling the blanks in order):

1. point
2. big bang
3. hot
4. expanded; cool
5. neutrons
6. hydrogen; helium (for the nuclear and creation blanks)
7. gravity
8. stars; galaxies (for the final form blanks)

(Note: The exact order of filling may depend on the exact layout of the blanks in the original worksheet, but the above words are derived from the text about the Big Bang Theory.)