Heredity
Astronomy
Ecosystem
Cells
Hydrologic Cycle
100

Usual method of cell division.

What is mitosis?

100

The partial or complete interception of the light of one component of an object by another.

What is an eclipse?

100

An individual form of life that is capable of growing, metabolizing nutrients, and usually reproducing.

What is an organism?

100

The outermost layer of cells in plants, protects from infection.

What is a cell wall?

100

Something that drains or flows off, as rain that flows off the land in streams.

What is a runoff?

200

A genetically determined characteristic or condition.

What are traits?

200

A large system of stars held together by mutual gravitation and isolated from similar systems by space.

What is a galaxy?

200

A large community of plants and animals that occupies a distinct region. 

What is a biome?

200

Positively charged central region of an atom, made of one or more protons and neutrons.

What is a nucleus? 

200

The process by which the surface of the earth is worn away by the action of water, glaciers, winds, and waves.

What is erosion?

300

A cell that has two identical alleles for a particular trait

What is Homozygous?

300

The curved path, taken by a planet, satellite, or a spaceship around a celestial body such as the sun 

What is an orbit?

300

An animal that feeds on plants, a herbivore.

What are primary consumers?

300

The movement of a solvent through a membrane separating two solutions of different concentrations.

What is osmosis?

300

Water beneath the surface of the ground consisting largely of surface water that seeped down.

What is groundwater?

400

Nucleic acid that is the genetic material determining the makeup of all living cells.

What is DNA?

400

Either of the two tides that occur at the first or last quarter of the moon when the tide generating forces of the sun and moon oppose each other.

What is a neap tide?

400

A organism that serves as a source of food for other organisms in a food chain.

What are producers?

400

The process by which carbon dioxide, water, and salt are made into carbohydrates by green plants and bacteria.

What is photosynthesis?

400

The act or process of filtering.

What is filtration?

500

The producing of offspring.

What is breeding?

500

The parallel of lattitude approxamatly 23 degrees 27 inches north. It forms the boundary between the torrid and north temperate zones.

What is the tropic of cancer?

500

A organism that feeds on other organisms in a food chain.

What are consumers?

500

The movement of atoms or molecules from an area of higher concentration to an area of lower concentration.

What is diffusion? 

500

Any geological formation containing or conducting ground water. Supplies the water for wells and springs.

What is an aquifer?