Energy & Food Chains
What is the main energy source for almost all food chains?
The sun
What happens if a top predator disappears from a food chain?
Prey populations may grow too large
Breaks down waste and dead things
Decomposer
Which organ is part of the circulatory system?
Heart
The stomach and intestines are part of the
Digestive system
What is an example of a producer?
Grass
A bird builds a nest in a tree. What is it using the tree for?
Shelter
Eats only plants
Herbivore
What is the main job of the lungs?
Breathe in oxygen
Which body system helps you feel, see, and hear the world around you?
Sensory
A consumer gets its energy from:
Eating other organisms
In an ocean ecosystem, which is a producer?
Seaweed
Gets energy by eating other animals
Carnivore
What two systems work together when you breathe in oxygen and move it through your blood?
Respiratory and circulatory
What organ sends messages through your body?
Brain
What is the role of a decomposer?
Break down dead organisms
If insects disappear, what might happen to birds that eat them?
Birds might starve
Eats both plants and animals
Omnivore
The lungs bring in ______ and remove ______.
Oxygen, carbon dioxide
Which organ belongs to the digestive system?
Small intestine
What is an example of a food chain?
Sun → Grass → Deer
Which term means "living and nonliving things working together"?
Ecosystem
What is a food web?
Multiple food chains are connected
Pumps blood through your body
Heart
Which body system helps you breathe
Respiratory System