Almost all underwater discoveries depend on this device.
What is a submersible.
100
A community of organisms interacting with one another and with the nonliving environment.
What is an ecosystem.
100
A collection of interacting parts that work together to produce an action.
What is a system.
200
The declaration issued by President Lincoln in 1863 that proclaimed freedom for all slaves in those states or parts of states still under the control of the Confederacy.
What is Emancipation Proclamation.
200
The Alamo defender was a former congressman from Tennessee.
Who is Davy Crockett.
200
The deepest ocean area known is this Trench.
What is the Mariana Trench
200
Organisms that make their own food.
What is a producer.
200
Plants make sugar through this process.
What is photosynthesis.
300
A federal military base in Charleston Harbor, South Carolina; the site of the first shots fired in the Civil War.
What is Fort Sumter.
300
This man is known as the "Father of Texas."
Who is Stephen F. Austin.
300
Oceanographers use these in outer space to measure the topography of the ocean floor, the surface temperatures, and the ocean currents.
What are satellites.
300
In freshwater and ocean ecosystems, algae, and this producer are the most important.
What is phytoplankton.
300
These tubes transport water and mineral to the cells in plants.
What is xylem tubes.
400
The USS Monitor and CSS Virginia where the first battleships to have this improved addition.
What is ironclad.
400
Santa Anna was defeated at this mission.
What is San Jacinto.
400
Oceans are extremely deep, cold, and very dark. This other factor contributes to the difficulty of exploration.
What is pressure.
400
It is transferred from the Sun to producers, then to consumers and decomposers.
What is energy.
400
The process, in which, water evaporates through tiny holes in the leaves and passes into the environment.
What is transpiration.
500
This novel by Harriet Beecher Stowe brought home to thousands of Americans the terrors and brutality of slavery.
What is Uncle Tom's Cabin.
500
The people of Gonzales challenged the Mexican Army with this phrase.
What is "Come and take it."
500
These microscopic creatures live near the surface.
What is phytoplanktons.
500
Bacteria and fungi are these in a chain.
What is decomposers.
500
A characteristic that is passed down from parent to offspring, from generation to generation.