Lesson 1: Science

What is a system?

• One part that works by itself

• many parts that work together

• when matter or energy flows in

• when matter or energy flows out

What are some examples of a natural system?

• a classroom

• human body

• earth

• a car

what are examples of an input to the body?

• oxygen

• carbon dioxide

• sweat

• water

What is an example of an output in a human?

• sweat

• oxygen

• carbon dioxide

• nitrogen

what is an output of a plant or tree?

• nitrogen

• oxygen

• carbon dioxide

• water

which of the following systems is NOT a natural system?

• body

• earth

• car

• solar system

Which is organized from largest to smallest?

• cell, tissue, organ, organ system

• tissue, cell, organ, organ system

• organ system, organ, tissue, cell

• organ, organ system, tissue, cell

What is an example of a multicellular organism?

• tree

• human

• dog

• bacteria

The vascular, epidermal, epithelial, and connective are all types of

• organs

• organ systems

• tissues

• cells

A group of similar cells working together to perform a function is

• organ system

• bacteria

• organ

• tissue