Simple Animals

Vertebrates: are animals with backbones.

Invertebrates: are animas without backbones.

Symmetry: is the balanced arramgement of body parts around a center point or along a center line.

Sponges: are simple invertabrates that have pores.

Pores: is a small opening.

Stinging-cell animals: are animals with stinging cells and hollow saclike bodies that lack organs.

Tentacles: many stinging cell anoimals havs armlike parts.

Flatworm: are the simplest worms.

Tapeworm: is a kind of flatworm that has a falttened, ribbonlike body divide into sections.

Cyst: is a young worm with a protective covering.

Planarian: is a common freshwater flatworm that is not parasite.

Roundworm: are worms that have long bodies with pointed ends.

Hookworm: is roundworm that is parasite of humans.

Anus: is an opening through which undigested food leaves the body.

Segmented Worms: are worms with bodies divided into sections called segments.

Soft bodied animals: are animlas with soft body that ussually protected by a hard shell.

Mantle: the body is coverd by a thin fleshy tissue.

Plants

Chlorophyll: is a chemical that gives plants their green color and traps ligth energy.

Photosynthesis: the process in which plants use water, carbon dioxide and energy from the sun to make food.

Vascular plants: plants with tubelike cellsinthei roots, stems and leaves.

Nonvascular plants: plants dont have tubelike cells intheri stems and leaves.

Moss: is a small nonvascular plant that have both stems and leaves but no roots.

Sexual reproduction is the forming of a new organism joining two reproductive cells.

Egg: the female reproductive cell.

Sperm: the male reproductive cell.

Fertilization: the joining of the egg and the sperm.

Xylem: cell that carry water and dissolved minerals from the roots to the leaves.

Phloem: cells that carry food that is made in leaves to all parts of the plant.

Fern: is a vascular plant that reproduce with spores.

Seed: is the part of the plant that contains a new young plant and stores food.

Embryo: is an organism in its earliest stages of growth.

Conifer: is a plant that produce seed in cones.

Pollen: are tiny grainsof seed plants in which sperm develop.

Flowering plant: is a vascular plant that produces seed inside a flower.

Flower: is the reproductive part of the plant.

The Study of Life

Biology: is the study of living and once-living things.



Light microscope: light passes through the object being looked at and then through two or more lenses.

 

Stereomicroscope: is used fo viewing large objects and things through which light cannot pass, such as insect.



International System of Units: is a measuring system based on units of 10.



Meter: the SI unit of length.



Volume: is the amount of space a substance occupies.



Kilogram: the SIunit of mass.



Celsius: scientific measure of temperature.



Scientific method: the steps to solve problems.



Hypothesis: is the stament that can be tested.



Experiment: testing a hypothesis using a series of steps with controlled conditions.



Variable: is something that causes the changes observed in a experiment.



Contol: is a standard for comparing results.



Data: are the recorded facts from measurements of experiment.



Theory: is the hypothesis that has beeb tested again and again by many scientist with similar results each time.



Thechnology: the use of scientific discoveeries to solve everyday problems.