7Th Gr Science-From Bacteria To Plants Ch 1 Sec 1

Front 1

organism

Back 1

a living thing

Front 2

cell

Back 2

The basic unit of structure and function in an organism.

Front 3

unicellular

Back 3

A type of organism that is made up of a single-cell.

Front 4

multicellular

Back 4

A type of organism that is made up of many cells.

Front 5

development

Back 5

The process of change that occurs during an organism's life to produce a more complex organism.

Front 6

stimulus

Back 6

A change in an organism's surroundings that causes the organism to react.

Front 7

response

Back 7

An action or change in behavior that occurs as a result of a stimulus.

Front 8

reproduce

Back 8

The production of offspring that are similar to the parents.

Front 9

spontaneous generation

Back 9

The mistaken idea that living things arise from nonliving sources.

Front 10

controlled experiment

Back 10

An experiment in which all factors are identical except one.

Front 11

variable

Back 11

Any factor that can change in an experiment.

Front 12

What 4 things do all organisms need to survive?

Back 12

1. energy
2. water
3. living space
4. stable internal conditions

Front 13

energy

Back 13

1. Animals use food as their energy source.
2. Plants use sunlight along with carbon dioxide (a gas found in Earth's atmosphere), and water to make their own food.

Front 14

Autotroph

Back 14

An organism that can make its own food.

Front 15

Francesco Redi

Back 15

Redi placed meat in 2 identical jars-one covered, one not. Maggots grew in the uncovered jar but no maggots grew in the covered jar. Redi reasoned that the decaying meat did not produce maggots, but that the flies had laid eggs on the meat in the uncovered jar.

Front 16

Louis Pasteur

Back 16

Pasteur put clear broth into 2 flasks with curved necks. The necks would allow oxygen in but keep bacteria out. He boiled one flask, but not the other. A few days later, the unboiled broth was cloudy and the boiled broth was clear. Pasteur concluded that bacteria only appear when they are produced by existing bacteria.
The process of pasteurization is
named after Louis Pasteur.

Front 17

Heterotroph

Back 17

An organism that cannot make its own food.

Front 18

How important is water to living things?

Back 18

All living things need water to survive, most can live for only a few days without it. Water allows organisms to obtain chemicals from their surroundings, break down food, grow, move substances within their bodies, and reproduce.

Front 19

Living Space

Back 19

All organisms need a place to live-a place to get food, water, and find shelter.

Front 20

Homeostasis

Back 20

The maintenance of stable internal conditions despite changes in the surroundings.