Revision

Question 1

Biodiversity

Answer 1

Range of all living things

Question 2

Adaptation

Answer 2

Changes occurring in organisms to become better suited to environment

Question 3

Species

Answer 3

Groups of living things with similar characteristics and genetic code mostly the same

Question 4

Fossils

Answer 4

Remainder of impression of prehistoric plants or animals

Question 5

Exstinction

Answer 5

Species destroyed so it no less never exists

Question 6

Absolute dating

Answer 6

Using scientific knowledge and methods to determine age of fossils

Question 7

Relative dating

Answer 7

Comparing layers of sediment to determine age of fossils

Question 8

Natural selection

Answer 8

Change of genotype over many generations

Question 9

Homologous

Answer 9

Same basic structure

Question 10

Analogous

Answer 10

Structures that look similar but are not

Question 11

Charles Darwin

Answer 11

Natural selection in 1858, 
more individuals are produced than what will survive 
Best adapters survive
Competition for sources
Population change

Question 12

Evidence for evolution

Answer 12

Fossils

DNA study of biochemistry

Question 13

Speciation

Answer 13

Variation -different characteristics
Isolation- prevented from breeding
Natural selection

Question 14

Fossil tell us

Answer 14

Age and characteristics of organisms

Question 15

Why can fossil record be incomplete

Answer 15

Fossils could have weak bodies that do not withstand crushing

They could decay

Eaten by scavengers

Question 16

Speed

Answer 16

How fast or slow something is

Question 17

Acceleration

Answer 17

The rate of change in velocity

Question 18

Velocity

Answer 18

The rate at which displacement changes

Question 19

Displacement

Answer 19

Straight line distance

Question 20

Distance

Answer 20

How far away something is

Question 21

Average speed

Answer 21

Total divided by time

Question 22

Instantaneous speed

Answer 22

Speed at exact time

Question 23

Inertia

Answer 23

Tendency to resist any change in motion

Question 24

Force

Answer 24

Push pull or twist

F=mxa

Question 25

Newton’s first law

Answer 25

Inertia- object at rest will stay at rest unless an unbalanced force is acted upon it

Question 26

Newton’s second law

Answer 26

An object will accelerate in the direction of an unbalanced force acting upon it

Question 27

Newton’s third law

Answer 27

For every action force there is an equal reaction force

Question 28

Potential energy

Answer 28

Stationary

Question 29

Kinetic energy

Answer 29

Energy of moving object

Question 30

Law of energy conservation

Answer 30

Energy can not be destroyed or created but transformed

Question 31

Photosynthesis

Answer 31

Carbon dioxide + water +energy= glucose +oxygen

Question 32

Water cycle

Answer 32

Precipitation, run off accumulation transportation evaporation condensation

Question 33

Carbon cycle

Answer 33

Carbon dioxide in air- consumed by plants to animals- animals die forming fossil fuels- burning of fossil fuels into air +photosynthesis and respiration

Question 34

Respiration

Answer 34

Glucose+ oxygen =energy+ water +carbon dioxide

Question 35

Greenhouse gases

Answer 35

Gases that cause the heating of the planet by absorbing infrared radiation and carbon dioxide

Question 36

Ozone layer

Answer 36

A shield on the earths surface to prove that UV rays from striking the earth

Question 37

What is the threat to the ozone layer?

Answer 37

Chlorine in greenhouse gases destroys it

Question 38

Natural causes of greenhouse gases

Answer 38

Solar radiation

Question 39

Human causes of greenhouse gases

Answer 39

Deforestation, human burning of fossil fuels

Question 40

Impact of climate change

Answer 40

Temperature rising Changes in precipitation patterns Sea level rising

Question 41

Accuracy

Answer 41

Using appropriate equipment to carry out experiment with precision

Question 42

Reliability

Answer 42

The consistency of the experiment -numerous trials

Question 43

Validity

Answer 43

Fair test

Question 44

Controlled

Answer 44

Factors that are kept the same throughout the whole experiment

Question 45

Control

Answer 45

To show that any changes in the experiment are due to the independent variable

Question 46

Risk assess

Answer 46

Hazard Risk Mitigation