Science Final 7th Grade

55 terms by annah4 

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9 Characterisitcs of life

made of cells, adapt to changes, develop, uses energy, moves,reproduces

metabolism

all the chemical reactions within an organism

synthesis

to build or make something

Homeostasis

An organism's regulation of its internal environment to maintain conditions suitable for survival.

Growth

increase in size

Control GROUP:

The group with the normal or natural conditions. You already know the results in this group.

Experimental Group

*THE TEST GROUP*. It has all the same conditions of the control group except for the 1 thing you test.

Theory

an explanation of a natural phenomenon that is supported by scientific evidence. A hypothesis that has withstood repeated testing over a period of time.

Law

facts about nature that are known to be true.

hypothesis

An explanation for a question or a problem that can formally be tested. An educated guess.

observation

using as many senses to gather information about a particular situation. EX: Women is kneeling.

inference

made from observations and data collected. Inferences will be used to form a conclusion. EX: Women is using electricity.

biotic

living factors in the environment

abiotic

non-living factors in the environment

biosphere

Highest level of biological organization made up of all the ecosystems on earth.

3 levels of biosphere

Land
Atmosphere
Water

ecosystem

Consist of communities of organism and the abiotic factors that affect them.

producer

trap energy from the sun to make their own food through photosynthesis.

primary consumers

organisms that cannot make their own food, they eat the producers.

Secondary consumers

cannot make their own food.some eat for energy and nutrients.

Decomposer

are organisms that break down the remains of dead or decaying plants and animals and return them to the soil. Decomposers absorb nutrients from organisms.

Mutualism

both species benefit in this (++)

Commensalism

one partner benefits and the other one stays to same. (+0)

Parasitism

Parasites benefit but causes harm to the host (+-)

Endangered

very low animals left in species. Could become extinct.

Extinct

no more animals left in the species

matter is composed of

particles of atoms

solid

low energy, slow speed, packed tight

Liquid

medium energy, medium speed, looser packed

Gas

most energy, fast speed, packed very loose.

Element

cannot be broken down

Compound

composed of two or more separate elements; a mixture.

melting

solid - liquid

vaporization

liquid - gas

condensation

gas - liquid

freezing

liquid - solid

sublimation

solid - gas

Organic Compound

has carbon, hydrogn and oxygen

Cell theory

all living things are made of cells. cells are the basic unit of sturcture. all cells are produced from other cells.

Vacuole

stores food water and waste

Chloroplast

organelle that contains chlorophyll ONLY IN PLANT CELL

cell wall

protects the plant cell ONLY IN PLANT CELLS

Cytoplasm

where all the cells activities take place

Nucleus

controls all the cells activities

Cell membrane

protects the cell, controls what goes in and out of cell,

diffusion

Movement of a fluid from an area of higher concentration to an area of lower concentration.

osmosis

transport of water

Sedimentary Rocks

where most fossils are found

mutation

changes in an organisms DNA adaptations are result of

Adaptation

any variation that makes an organism better suited to its environment

evolution

series of changes that occur within an entire species over a period of time

Lamarck's Theory

keeping traits that parents developed during their lives. REJECTED! EX: mom dies hair blue baby will have blue hair.

Darwins Theory

humans choose organisms with the best traits and breed them to get offspring with best traits from both.

4 Parts of Darwins theory

1.organisms producing more offspring than can survive
2.variations are found amoung individuals of a species
3.some variations enable members of population to survive and reproduce better than others
4. overtime offspring of individuals with helpful variations make up more and more pop.

Fungi

Get nutrients by eating dead or decaying animals

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