The Hebrew word pronounced baw-raw means to form, or to give shape. It is the actual word that is translated as "created" in Genesis 1:1 (note how the creation was "without form" before it was given form):
"1:1 In the beginning God created the heaven and the earth. 1:2 And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters." (Genesis 1:1-2 KJV)
The very same original Hebrew word is also translated as "Creator":
"40:28 Hast thou not known? hast thou not heard, that the everlasting God, the LORD, the Creator of the ends of the earth, fainteth not, neither is weary? there is no searching of his understanding." (Isaiah 40:28 KJV)
It was by means of the energy of The Spirit of God that "creation" happened. Albert Einstein's famous E=mc2, which describes how energy and physical matter are merely two states of the same thing, also describes Creation. Energy ("exertion of force") created matter ("that which has mass and occupies space").
"104:30 Thou sendest forth thy spirit, they are created: and thou renewest the face of the earth." (Psalm 104:30 KJV)
"Thus the heavens and the earth were finished, and all the host of them"
The "days" of Creation began with The Spirit Of God giving form to matter, including the stars (the sun is a typical main-sequence yellow star) which began to shine upon earth.
"1:1 In the beginning God created the heaven [see Heavens Below, Heavens Above] and the earth. 1:2 And the earth was without form, and void; and darkness was upon the face of the deep. And the Spirit of God moved upon the face of the waters.
The earth's surface continued to take form:
"1:6 And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters. 1:7 And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so. 1:8 And God called the firmament Heaven. And the evening and the morning were the second day." (Genesis 1:6-8 KJV)
"1:9 And God said, Let the waters [see also Hydrogen] under the heaven be gathered together unto one place, and let the dry land appear: and it was so. 1:10 And God called the dry land Earth; and the gathering together of the waters called he Seas: and God saw that it was good.
"1:14 And God said, Let there be lights in the firmament of the heaven to divide the day from the night; and let them be for signs, and for seasons, and for days, and years: 1:15 And let them be for lights in the firmament of the heaven to give light upon the earth: and it was so. 1:16 And God made two great lights; the greater light to rule the day, and the lesser light to rule the night: he made the stars also. 1:17 And God set them in the firmament of the heaven to give light upon the earth, 1:18 And to rule over the day and over the night, and to divide the light from the darkness: and God saw that it was good. 1:19 And the evening and the morning were the fourth day." (Genesis 1:14-19 KJV)
"1:20 And God said, Let the waters bring forth abundantly the moving creature that hath life, and fowl that may fly above the earth in the open firmament of heaven. 1:21 And God created great whales, and every living creature that moveth, which the waters brought forth abundantly, after their kind, and every winged fowl after his kind: and God saw that it was good. 1:22 And God blessed them, saying, Be fruitful, and multiply, and fill the waters in the seas, and let fowl multiply in the earth. 1:23 And the evening and the morning were the fifth day." (Genesis 1:20-23 KJV)
Animals and man:
"1:24 And God said, Let the earth bring forth the living creature after his kind, cattle, and creeping thing, and beast of the earth after his kind: and it was so. 1:25 And God made the beast of the earth after his kind, and cattle after their kind, and every thing that creepeth upon the earth after his kind: and God saw that it was good.
The LORD's Sabbath, as an eternal testimony to the Creator:
"2:1 Thus the heavens and the earth were finished, and all the host of them. 2:2 And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made. 2:3 And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made." (Genesis 2:1-3 KJV)
Fact Finder: Where was Jesus Christ at the time of Creation?