Biology Chapter 3 Crq's

Front 1

17) What is photosynthesis? Pg 68

Back 1

Photosynthesis-autotrops use light energy to power chemical reactions that convert carbon dioxide & H2O into O and energy-rich carbo's such as sugars & starches.

Front 2

18) Write the chemical equation for photosynthesis.

Back 2

Carbon Dioxide + H2O -> Carbohydrates & Oxygen

Front 3

19) Who are the leading autotrophs on land? In water?

Back 3

Land-plants main autotrophs
Water-ecosystems

Front 4

20) What is the difference between chemosynthesis and photosynthesis?

Back 4

Chemosysnthesis-organisms use chemical energy to produce carbohydrates. While photosynthesis uses light energy to power chemical reactions that convert carbon dioxide & H2O into O + enenrgy-rich carbo's (sugars + starches)

Front 5

21) Another name for consumers is ___________. List 5 types and give examples for each type. Pg 69

Back 5

?

Front 6

4) List the levels of organization in our biosphere from least complex to most complex.

Back 6

Individual, population, community, ecosystem, biome, and biosphere

Front 7

5) If a scientist wanted to focus his study on a group of species in an area, what level would he/she study?

Back 7

Populations would be the level a scientist would want to study, if his study focused on a group of species in one area.

Front 8

8) Why do scientist use models to study ecological changes?

Back 8

Scientist use models to study ecological changes because predictions made by ecological models are often tested by further observations and experiments.

Front 9

1) What is ecology?

Back 9

Ecology is the scientific study of interactions among organisms & btw organisms and their environment or surroundings.

Front 10

22) What does a food chain represent?

Back 10

?

Front 11

23) Draw a diagram of a food chain in which you are a member.

Back 11

?

Front 12

24) Which group of organisms is always found at the base of a food chain or food web?

Back 12

?

Front 13

25) What is a food web? Pg 70

Back 13

?

Front 14

26) Food webs are broken down to levels. What are the levels called and what are in each level?

Back 14

?

Front 15

27) According to the diagram what does the Heron feed on? Pg 71

Back 15

?

Front 16

28) What proportion of energy is transferred to each trophic level in an ecosystem. Pg 72.

Back 16

?

Front 17

29) Describe the 3 types of ecological pyramids.

Back 17

?

Front 18

30) see diagram.

Back 18

?

Front 19

2) How are the words ecology, oikos and economy related?

Back 19

The words ecology, oikos & economy are all related.
Ecology is based on the word oikos, means house, which is the root of the word economy.
German biologist Ernst Haeckel, saw the living world as a household w/ an economy in which each organism plays a role.

Front 20

3) What does a biosphere contain?

Back 20

The bioshpere contains the combined portions of the planet in which all of life exists, including land, H2O + air/atmosphere.

Front 21

6) List some tools scientist use to study the living world.

Back 21

Tools: binoculars, field guides, studies of DNA(identify bacteria in mud of coastal marshes),radio tags (to track migrating wildlife), and or use data gathered by satellites.

Front 22

7) Describe the 3 basic methods of ecological research. Pg 65

Back 22

Observing-first step in asking ecological questions.ex. what species live here? How many individuals of each species are there?
Experimenting-used to test hypotheses. Some are conducted within natural ecosystems.
Modeling-ecologists make models to gain insight into complex phenomena such as the effects of global warming on ecosystems.

Front 23

9) How does a satellite collect data and convert it into an image? Pg 66

Back 23

Satellites are fitted w/optical sensors that can scan several bands of the electromagnetic spectrum & convert the bands into electrical signals. Signals processed through a computer & converted into digital values which are use to construct an image.

Front 24

10) How can satellite use be beneficial to ecologist? Pg 67

Back 24

Satellite images can help ecologists to estimate the rate of a destruction that may occur ex. rain forest. They can cover every sq meter of the Earth's surface. Ecologist can work w/ local governemnts to slow the destruction of ecosystems.

Front 25

11) Why do organisms need energy? List two uses of energy.

Back 25

Organisms need energy beacuse without a constant input, living systems cannot function. Sunlight, inorganic chemical compounds (mineral water-chemical energy).

Front 26

12) How is sunlight important to most ecosystems?

Back 26

Sunlight is the main energy source for life on earth.

Front 27

13) How much of the sun's energy is used by living things?

Back 27

A samll amount (less than 1%) of the sun's energy is used by living things.

Front 28

14) If organisms don't rely on the sun for its energy, where does their energy come from?

Back 28

Some types of organisms rely on the energy stored in inorganic chemical compounds.

Front 29

15) What are autotrophs? List 3 examples.

Back 29

Organisms that capture energy from sunlight/chemicals and use that energy to produce their food. ex. plants, some algae, & certain bacteria.

Front 30

16) Why are autotrophs called producers?

Back 30

Because producers do the same thing as autotrophs. They can use energy to produce their own food.
simple inorganic compounds->complex organic molecules->living tissue