The Catechism in Questions & Answers

68. What do we know about God as the Creator?

“In the beginning God created the heavens and the earth” (Genesis 1: 1), both the visible—that is, the material creation— and the invisible. Everything has emanated from God’s creative activity.
God has created from nothing and without any template: “God [...] calls those things which do not exist as though they did” (Romans 4: 17). He has also fashioned things and living beings from matter He had previously created (cf. Genesis 2: 7-8, 19) and has laid His laws into them. All created things are subject to Him.

“And the Lord God formed man of the dust of the ground, and breathed into his nostrils the breath of life; and man became a living being. The Lord God planted a garden eastward in Eden, and there He put the man whom He had formed. [...] Out of the ground the Lord God formed every beast of the field and every bird of the air, and brought them to Adam to see what he would call them. And whatever Adam called each living creature, that was its name.”
Genesis 2: 7-8, 19