How did god create the world in 7 days?

Answer 1

With the exception of mankind, we are only told what God made, not how He made it. That fact is in order to stress mankind's importance.

To make man, God fashioned the appropriate shape from dirt and breathed a soul into it (Genesis ch.2). He then made the first woman by fashioning her from a piece of the man's flesh (ibid).

Day by day, God created the universe and its contents (Genesis ch.1).God created the universe out of nothing (Exodus 20:11, Isaiah 40:28; Rashi commentary to Genesis 1:14; Maimonides' "Guide," 2:30).Note that the Torah, in describing the Creation, deliberately employs brevity and ellipsis, just as it does in many other topics. See the Talmud, Hagigah 11b.

• On day 1: God created the universe in general, light, and this Earth. The light was not the same as that of the sun. Rather, it was light that God created before the sun, and which emanated from a point in space without any physical source; like what we might term a "white hole."
  
• On day 2: God created the separation between the Earth and the upper atmosphere.
  
• On day 3: God separated the continents from the oceans, and created plants.
  
• On day 4: God created the sun, moon, and stars.
  
• On day 5: God created birds and fish.
  
• On day 6: God created animals and people.
  
• On day 7: God ceased creating, thereby creating the concept of rest.
  

See also:

Is there evidence for Creation?

Can you show that God exists?

Seeing God's wisdom

Answer 2

God created the world in seven days, everyday creating a different aspect of the earth.

On the first day, God created light and separated the light from the darkness, calling light "day" and darkness "night." On the following day, god created the sky to separate the waters. On the third day, God created dry ground and called it "land" and gathered the water, calling it "seas". He also created vegetation. The fourth day brought the sun, moon and stars to give light to the earth and to govern and separate day and night. These would also serve as signs to mark seasons, days, and years.

God created every living creature of the seas and every winged bird on the fifth day, blessing them to multiply and fill both sea and sky with life. On the sixth day God created animals to fill the earth, including the first man and woman. They are known as Adam and Eve. God blessed these people and gave them every creature and the whole earth to rule over, care for, and cultivate.

By the seventh day, God had finished his creation of earth so he rested. This seventh day is known as the Sabbath day and is the holy day to Christians.

Answer 3

Because God is all powerful and has the ability to do anything. He is the Controller of the universe.