1. STUDY ISLAND MCAS REVIEW
LIFE SCIENCE
Assignment #4
Energy & Living Things
Changes in Ecosystems

2. Energy in Ecosystems
PHOTOSYNTHESIS
Can you
explain the
diagram shown?

3. Energy in Ecosystems PHOTOSYNTHESIS What is the source of energy
for photosynthesis?
What pigment is found in
plants that allows them to
photosynthesize?
What ingredients do plants
need in order to
What are the products
of photosynthesis?
PHOTOSYNTHESIS

4. Energy in Ecosystems PHOTOSYNTHESIS What is the source of energy
for photosynthesis?
The Sun
What pigment is found in
plants that allows them to
photosynthesize?
Chlorophyll
What ingredients do plants
need in order to
Carbon Dioxide & Water
What are the products
of photosynthesis?
Sugar (Glucose) & Water
PHOTOSYNTHESIS

5. Explain the formula shown above?
Energy in Ecosystems
Can you…
Explain the formula shown above?

6. Can you name the producer, primary consumers,
Energy in Ecosystems
QUICK CHECK!
Can you name the producer, primary consumers,
secondary consumers?

7. Energy in Ecosystems FOOD WEB CONNECTIONS What if….
All of the trees were cut down
and removed from this food web?
All of the mountain lions were hunted
All of the insects (grasshoppers/aphids)
were killed by pesticides and removed
from this food web?

8. Energy in Ecosystems Can you…
Describe the role of decomposers in an ecosystem?
Name two kinds of decomposers in a forest food web?

9. Changes in Ecosystems Over Time
Can you
explain the
graph shown?

10. Changes in Ecosystems Over Time
Can you
explain the
graph shown?

11. Changes in Ecosystems Over Time
Can you
explain the
graphs shown?

12. This lesson will help you to review material
that you learned in Grade 7 Life Science and
prepare you for this week’s Study Island lesson.
Your Grade 7 teachers send best wishes
and know you will be successful on
Grade 8 Science MCAS.
YOU CAN DO IT!!