Exams

Question 1

homeostasis

Answer 1

makes internal conditions stable

Question 2

the work of scientists begins with

Answer 2

careful observations

Question 3

controlled experiment

Answer 3

an experiment in which one variable is changed

Question 4

how does science differ from other subjects?

Answer 4

it relies strictly on facts

Question 5

when is a hypothesis useful?

Answer 5

when it’s testable

Question 6

where may a hypothesis come from?

Answer 6

observations, inferences, or prior, knowledge

Question 7

spontaneous generation

Answer 7

the idea that life could arise from nonliving matter

Question 8

what isn’t a goal of science?

Answer 8

something that cannot be proven

Question 9

inference

Answer 9

a logical interpretation based on prior knowledge or experience

Question 10

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

Answer 10

so that their work can be replicated by other scientist

Question 11

a tissue is composed of what

Answer 11

similar and individual cells

Question 12

theory

Answer 12

well tested explanation that unifies a broad range of observations

Question 13

biology

Answer 13

study of life

Question 14

osmosis

Answer 14

diffusion of water across a semipermeable membrane like the cell membrane

Question 15

ribosomes

Answer 15

small particles in cell where proteins are assembled

Question 16

chromosomes

Answer 16

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

Question 17

cell wall

Answer 17

strong supportive layer around the cell that protects the cell

Question 18

cell membrane

Answer 18

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

Question 19

characteristics of living things

Answer 19

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

Question 20

nucleus

Answer 20

control center of cell

brain of cell

Question 21

Goal of science?

Answer 21

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