Ecosystems
What is an ecosystem?
Living and nonliving things interacting in an environment.
What helps a frog jump away from danger?
Strong legs
What do fossils tell us?
Information about past life and environments.
What causes sand to move in a desert?
Wind
What is a renewable resource?
A resource that can be used again and again.
Why do frogs hide when predators are near?
To survive by avoiding danger.
How do leaves help plants survive?
They capture sunlight to make energy.
Why are rock layers important?
They show changes over time.
Why do plants reduce erosion?
Roots hold soil in place.
Why is water considered renewable?
It cycles through the environment.
How do animals respond to environmental changes?
They change behavior to survive.
Why does a duck’s beak shape matter?
It helps it get food.
How can a river create a canyon?
By slowly eroding rock over time.
Why does faster wind cause more erosion?
It moves more particles.
What is one negative impact of dams?
They can damage habitats.
Why do organisms depend on each other?
For food, shelter, and survival.
How do internal and external structures work together?
They help organisms survive and function.
Why are fossils in lower layers older?
They were formed earlier over time.
Why does water cause erosion on hills?
It carries soil downhill.
Why might a town choose renewable energy?
It doesn’t run out and is better for the environment.
A pond changes from calm to rough water. How might animals respond?
They may hide or change movement for safety.
Explain how a plant’s roots and leaves work together.
Roots absorb water; leaves make food.
What evidence supports that land was once underwater?
Marine fossils in rock layers.
A hill with grass erodes less than a bare hill. Why?
Roots hold soil and reduce runoff.
Compare hydroelectric energy to fossil fuels.
Hydroelectric is renewable; fossil fuels are not.