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Biology 9 Weeks Test > Study > Flashcards

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1
Q

Goal of science is not

A

Not something that can’t be proven

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2
Q

Steps of an experiment

A

Observe, ask a question, form an hypothesis, set up a controlled experiment, make a conclusion.

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3
Q

Hypothesis

A

Educated guess

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4
Q

Controlled experiment

A

Whenever one variable is changed at a time

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5
Q

Why do scientist publish their experiments?

A

Other scientist can see their work and further test it.

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6
Q

Theory

A

Well tested explanation that unifies a broad range of observations

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7
Q

Biology

A

Understanding the living world

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8
Q

5 characteristics of all living things

A

Reproduce, made up of units called cells, grow and develop, respond to their environment, based on a universal genetic code.

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9
Q

Homeostasis

A

Organisms keep their internal conditions stable

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10
Q

Metabolism

A

Combination of chemical reactions through which an organism breaks down materials as it carries out life processes

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11
Q

Microscope

A

Tool that helps you see things that are to small to be seen with the naked eye

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12
Q

Cell culture

A

A group of cells develops from a single cell

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13
Q

Cell fractionation

A

A cell is separated into different parts

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14
Q

Three particles that make up an atom

A

Neuton, proton, electron.

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15
Q

Where are the particles of an atom located?

A

Neutron-inside the nucleus
Proton- inside the nucleus
Electron- orbiting the outside

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16
Q

Isotope

A

Different number of neutrons

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17
Q

Species

A

Group of organisms so similar to one another that they can breed and produce fertile offspring

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18
Q

Population

A

Group of individuals that belong to the same species and live in the same area

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19
Q

Community

A

Assemblages of different populations that live together in a defined area a

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20
Q

Ecosystem

A

Collection of all organisms that live in a particular place, together with their non living, or physical, environment.

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21
Q

Biome

A

Group of ecosystems that have the same climate and similar dominant communities

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22
Q

Biosphere

A

Contains the combined portions of the planet in which all life exists, including land, water, and air, or atmosphere.

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23
Q

Basic unit of matter

A

Atom

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24
Q

Element

A

Substance made entirely of one atom

25
Q

First ten elements

A

Hydrogen, helium, lithium, beryllium, boron, carbon, nitrogen, oxygen, fluorine, neon.

26
Q

Inference

A

Idea or conclusion that’s drawn from evidence and reasoning

27
Q

Cell

A

Basic building block of all living things

28
Q

Metric system

A

Common units of measurement

29
Q

Atom

A

Basic building block of ordinary matter.

30
Q

Data

A

Raw facts

31
Q

Redi’s experiment

A

You should know this

32
Q

Spontaneous generation

A

Production of living organisms from non living matter

33
Q

Covalent bond

A

Chemical bond that that involves sharing of electron pairs between atoms.

34
Q

Ionic bond

A

Involves electrostatic attraction between oppositely charged electrons

35
Q

Herbivores

A

Only eat plants

36
Q

Omnivores

A

Eat plants and meat

37
Q

Carnivores

A

Eat meat

38
Q

Detritivores

A

Feeds on dead matter

39
Q

Decomposers

A

Break down dead organisms

40
Q

Main source of energy in an ecosystem

A

Sun

41
Q

Autotroph

A

Produces its own food

42
Q

Heterotroph

A

Depends on producers for food

43
Q

Food chain

A

Sequence of who eats whom in a biological community

44
Q

Food web

A

Connection of food chains

45
Q

Trophic level

A

Position a organism occupies in a food chain

46
Q

Ecological pyramid

A

Shows the bio,ass at each trophic level

47
Q

Biomass

A

Biological material derived from living or recently living organisms

48
Q

Photosynthesis

A

Process where a plant you light energy from the sun to make into chemical energy later released to fuel the organisms activities

49
Q

Chemosynthesis

A

Conversion of one or more carbon molecules and nutrients into organic matter

50
Q

Nitrogen fixation

A

When nitrogen on the atmosphere is converted into ammonia

51
Q

Denitrification

A

Remove the nitrates form soil, air, or water by chemical reduction

52
Q

Primary productivity

A

Rate at which energy is converted by photosynthetic and chemosynthetic autotrophs to organic substances

53
Q

Limiting nutrient

A

The nutrient that causes change if taken away

54
Q

How does a limiting nutrient affect a ecosystem

A

If it doesn’t have the limiting nutrient no growth can occur

55
Q

Responding variable

A

The variable that is in response to the manipulated variable

56
Q

Manipulated variable

A

The variable that is changed

57
Q

Why is it important to only change one variable at a time

A

So you will know which variable caused the change

58
Q

Goal of science

A

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

Biology 9 Weeks Test (1 decks)

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