This document discusses different types of interactions between organisms in an ecosystem. It explains that organisms have feeding relationships where some organisms obtain food by eating other organisms. It then defines several key relationship types between organisms, including predator-prey relationships, competition for resources, mutualism, parasitism, and commensalism. Food chains and food webs are also discussed as a way that energy passes between organisms in an ecosystem.

1. Animal Interactions
Healthy ecosystems usually contain many different habitats and a variety of organisms. The organisms
living there interact in different ways.
Food is one of the most important needs of all living things. Therefore, one of the relationships between
organisms is a feeding relationship. Some organisms do the eating. Other organisms are the food
Let’s warm up with our Jacaranda science reading of the day on page 170 - 172

2. Predators, Prey & Competitors
• Predator – an animal that eats other
animals
• Prey – an animal that is eaten by a
predator
• Competitor – organisms that have the
same food source and live in the same
habitat.

3. Prey vs Predator Population Balance
Deadliest Showdowns – predator vs prey
Top 10 Animal Camouflage - Earth Unplugged

4. More Animal Interactions

5. Mutualism
A relationship which is beneficial to both organisms
involved.
Amazing Symbiosis: Ant Army Defends Tree | National Geographic

6. Parasitism
Parasitism is a non-mutual relationship between species,
where one species, the parasite, benefits at the expense of
the other, the host.
Body Invaders | National Geographic The Most Gruesome Parasites

7. Commensalism
A relationship between two organisms in which one benefits
and the other neither benefits nor harmed.
Cross-kingdom Commensalism

8. Nearly all life on planet Earth starts with the Sun.
Sun  grass  grasshopper  kookaburra
Plants use energy from the Sun and convert it to energy they can use to live through a
process called photosynthesis.
Inside plant cells is a chemical called chlorophyll. This chemical gives plants their green
colour and allows them to absorb light energy.
Food Chains

9. Plants and animals use energy
to grow, repair themselves and
function on a day-to-day basis.
Plants get their energy from the
Sun and animals get their
energy from other living things.
Food Chains

10. Food Webs
Joining several food chains together and combining them produces a food web.
The arrows indicate the flow of energy.
Eg: The cricket, goes into the stomach of the robin.

11. • Construct your study notes in your Science writing books
Use colour!
• Complete Food Webs W.S
• Complete Food Chains & Food Webs W.S
• Complete Jacaranda Exercise Q’s 1 – 4 + 6 + 8
Animal Interactions Activities