organisms in the ecosystem
A bear settles in a den for many months in the winter.
Geese fly south to find food in the winter.
Which is an example of migration?
Geese fly south to find food in the winter.
What is an organism?
a living thing
A long period with little or no rainfall.
Draught
Which of these is the best description of fossils?
Dinosaurs are fossils.
Animals can be fossils, but plants cannot.
All things that die become fossils.
Fossils are evidence of past living things.
Fossils are evidence of past living things.
List two examples of fast changes on Earth.
earthquakes, landslides, tsunamis, volcanic eruptions
Which of these statements explains how changes in precipitation affects animals?
Trees do not grow very tall in deserts. Deserts are very dry and have little rain.
It does not rain in the region for a long time. The plants dry up and the deer cannot find food.
It does not rain in the region for a long time. The plants dry up and the deer cannot find food.
What is behavior?
how an organism acts
An overflow of water onto dry land.
flood
There are many different types of fossils, not just bones. Which of these items are also considered fossils?
oose all that apply.
A footprint of a Tyrannosaurus Rex
A clamshell found on the beach
The skeleton of a snake found in the desert
The imprint of an extinct type of palm tree
The imprint of an extinct type of palm tree
A footprint of a Tyrannosaurus Rex
List 2 slow changes on Earth
weathering and erosion
How does temperature affect animal migration?
When temperatures drop in their summer home, animals will migrate to their warmer winter home.
be in a sleeplike state. When animals slow their body processes and do not eat or move
Hibernate
Give an example of a food chain. How does the energy flow?
sun-plant-grasshopper-mouse-owl
To make a guess about something based on facts, about how animals moved or how plants reproduced or what environment they lived.
Infer
Places nearer to the ______have warmer temperatures and places near the _____ have colder temperatures.
Equator and Arctic
How does precipitation affect animal migration?
Too little or too much precipitation will can kill the plants causing animals to move to where food is more readily available.
to move to a different environment, when environmental conditions change.
migrate
Which of these statements describes how a flood forces some animals to move?
A flood destroys all grasses and shrubs in a grassland, and deer leave to find food.
A flood provides more water and fills ponds for fish to live in.
A flood destroys all grasses and shrubs in a grassland, and deer leave to find food.
What are the two types of fossils?
Trace fossils and body fossils
What are weathering and decomposition?
Weathering is the process of breaking rocks down into minerals such as sand and clay.
Decomposition is the process of breaking down plant or animal material into smaller pieces that form soil.
What might cause a species to die off?
Any changes to the food chain could cause animals to die off or move or become overpopulated. Too many plants can cause the bunny population to grow which could lead to more bunny predators to move to the area.
Plants become inactive for an extended period of time; is similar to hibernation.
Dormant
A long period of drought causes changes to an ecosystem. Streams and ponds can dry up during a drought. Some organisms do well during a drought while others die.
Mosquitoes
Frogs
Fish
Buffalo grass
Buffalo grass
Explain what trace fossils and body fossils are
A trace fossil could be a footprint. They show how an organism lived. Body fossil preserves bodies and body parts.
Pick all events that make fast changes on Earth’s surface.
Heavy rains enter a narrow river and cause the banks to flood.
An earthquake in a city destroys buildings and bridges.
Weathering breaks rocks down into sand and clay.
Heavy rains enter a narrow river and cause the banks to flood.
Heavy rains enter a narrow river and cause the banks to flood.
Heavy rains enter a narrow river and cause the banks to flood.