2nd nine week review

What represents a physical change in food while its being digested? 

• Saliva changing carbohydrates into sugars
• Tearing off the food with your teeth
• Chemicals in the stomach digesting proteins 

What is a chemical change that happens in the digestive system? 

• Chewing and swallowing food 
• Absorption of nutrients by vili in the small intestines 
• Reaction of saliva ,stomach acid, bile and pancreatic juices with food. 

Carbohydrates can be broken into..

• vitamins
• sugars
• energy

What pulls the roots to grow downward and leaves and stem upwards? 

• gravity
• osmosis
• sunlight

what happens to a plant when it lacks of  turgor pressure?

• It keeps growing 
• excess of humidity
• the leaves will start wilting

What is the main function of the respiratory system?

• Provides movement for the body
• Breaks down food into nutrients
• Supplies oxygen to the blood and delivers oxygen to the body

What is the main function of the excretory system :

• Helps digest food 
• Removes waste for the body
• Carry oxygen to the body 

Which system secretes hormones and helps regulate the body processes

• Circulatory
• Integumentary
• Endocrine

What is the main function of the muscular system

• support the body 
• break down of food
• movement of the body 

Why do plants grow towards the window ?

• Stimulus of sunlight 
• To get fresh air 
• The plant is responding to water