What are the characteristics of living things?
A change in an organism's surroundings is a (stimulus/response)
Stimulus
A (blank) variable is the one factor that changes in a controlled experiment.
Manipulated
Which basic need is a fox meeting by feeding on berries?
It is getting energy by eating food
Single- celled organisms, like bacteria
Unicellular
The mistaken idea that living things can arise from non living sources
Spontaneous generation
Autotrophs
Organisms that make their own food
A bird sitting in a tree flies away as you walk by. Which of the life characteristics explains the bird's behavior?
Response to surroundings
Why is the idea of spontaneous generation incorrect?
Living things can only come from other living things.
The artic fox has thick, dense fur in the winter and much shorter fur in the summer. How does this help the fox maintain homeostasis?
This allows the fox to keep its internal body temperature stable even though the temperature of the fox's surroundings changes.
Process of change that occurs during an organism's life
Development
Controlled Experiment
A scientist carries out a series of tests that are identical in every respect except for one factor
The maintenance of stable internal conditions
Homeostasis
Trees do not move like birds do, but they are living things. Why?
They have all of the characteristics of life
or
Although many living things move, movement is not a characteristic of life.
In Redi's experiment which two factors were kept constant in order to avoid error?
Location & Temperature
In Pasteur's experiment why were the use of curved necks so important to his experiment?
Curved necks would prevent any bacteria from getting into the flask from the air.