describe what always happens under certain conditions

a type of tissue that covers the body, including the skin and the linings of internal passages

carbohydrates, lipids, proteins, and nucleic acids

The science that studies life

The smallest part of a substance that cannot be broken down chemically

a suggested explanation for an event, which can be tested.

a type of tissue that supports and binds other tissues together, including blood, bone, and lymph tissues

Epithelial tissue, Connective tissue, Muscle tissue, and Nervous tissue

a type of tissue that includes skeletal muscles that move the skeleton, and smooth muscles that surround organs like the stomach

a method of research with defined steps that include experiments and careful observation

diatomic hydrogen (h2)

the smallest unit that can live on its own and that makes up all living organisms and the tissues of the body

a group of two or more atoms that bond together

a type of tissue that are made up of nerve cells (neurons), which carry messages throughout the body

a group of different tissues working together to perform a job inside the body

a group of similar cells that work together to perform a specific function within an organism

a group of related disciplines that study the natural world

energy production, building proteins and secretions, destroying toxins, and responding to external signals.

an explanation of a hypothesis that has been proven true by different experiments with consistent results over time.

a large molecule made up of thousands of atoms that are covalently bonded together.

a tiny organ inside a cell that has a specific job to do

8

the skin