📚 Part 1: Understanding Stimulus and Response

A stimulus is _________________________________ that causes an organism to react. The reaction is called a response.

Living things must be able to _________________ to changes in their environment in order to survive. For example, when you touch something hot, your hand quickly _________________ away from the heat source.

🔬 Part 2: Types of Stimulus

Type: _________________ stimulus

Definition: A stimulus related to _________________

Example: _________________________________________________

Type: _________________ stimulus

Definition: A stimulus involving _________________ substances

Example: _________________________________________________

Type: _________________ stimulus

Definition: A stimulus involving _________________ or pressure

Example: _________________________________________________

Type: _________________ stimulus

Definition: A stimulus involving _________________ or magnetic fields

Example: _________________________________________________

Type: _________________ stimulus

Definition: A stimulus involving _________________ changes in the environment

Example: _________________________________________________

✏️ Part 3: Apply Your Knowledge

a) A plant growing toward sunlight: _________________ stimulus

b) Pulling your hand away from a sharp object: _________________ stimulus

c) A dog smelling food and drooling: _________________ stimulus

d) Shivering when it gets cold outside: _________________ stimulus