Exams Flashcards

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1
Q

homeostasis

A

makes internal conditions stable

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2
Q

the work of scientists begins with

A

careful observations

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3
Q

controlled experiment

A

an experiment in which one variable is changed

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4
Q

how does science differ from other subjects?

A

it relies strictly on facts

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5
Q

when is a hypothesis useful?

A

when it’s testable

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6
Q

where may a hypothesis come from?

A

observations, inferences, or prior, knowledge

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7
Q

spontaneous generation

A

the idea that life could arise from nonliving matter

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8
Q

what isn’t a goal of science?

A

something that cannot be proven

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9
Q

inference

A

a logical interpretation based on prior knowledge or experience

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10
Q

why do scientist need to publish the details of important work?

A

so that their work can be replicated by other scientist

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11
Q

a tissue is composed of what

A

similar and individual cells

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12
Q

theory

A

well tested explanation that unifies a broad range of observations

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13
Q

biology

A

study of life

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14
Q

osmosis

A

diffusion of water across a semipermeable membrane like the cell membrane

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15
Q

ribosomes

A

small particles in cell where proteins are assembled

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16
Q

chromosomes

A

thread like structures in nucleus that contain genetic information that is passed from generation to generation

17
Q

cell wall

A

strong supportive layer around the cell that protects the cell

18
Q

cell membrane

A

a thin flexible barrier around cell that regulates what enters and leaves

19
Q

characteristics of living things

A
  • made up of cells
  • reproduce
  • based on a universal genetic code
  • grow and develop
  • respond to environment
  • maintain stable environment
  • change over time
20
Q

nucleus

A

control center of cell

brain of cell

21
Q

Goal of science?

A

investigate and understand the natural world, to explain events in the natural world, and to use those explanations to make useful predictions.