Week 3 Key Facts

Question 1

Wht is the central nervous system is made up from ?

Answer 1

Brain and Spinal cord

Question 2

How are the sense organs and the central nervous system linked?

Answer 2

Nerves

Question 3

What is a microbe that causes disease called?

Answer 3

Pathogen

Question 4

What is interdependence?

Answer 4

Relationship between all living things

Question 5

What does saturated mean?

Answer 5

All single bonds

Question 6

What is an alkane?

Answer 6

A hydrocarbon with all single bonds

Question 7

What is a hydrocarbon?

Answer 7

A molecule made from carbon and hydrogen only

Question 8

What is the formula of methane?

Answer 8

CH4

Question 9

What is the formula of ethane?

Answer 9

C2H6

Question 10

What is the formula of propane?

Answer 10

C3H8

Question 11

What does unsaturated mean?

Answer 11

Contains a double bond

Question 12

What is an alkene?

Answer 12

A hydrocarbon with a double bond

Question 13

What is the formula for ethene?

Answer 13

C2H4

Question 14

What is the formula of propene?

Answer 14

C3H6

Question 15

What is a polymer?

Answer 15

A molecule made from small alkenes joining together

Question 16

What polymer is made from ethene monomers?

Answer 16

Polyethene

Question 17

What does non biodegradeble mean?

Answer 17

Does not break down in the ground

Question 18

What are the problems of using plastics?

Answer 18

They are non biodegradeble and release toxic gases when burnt

Question 19

How are seismic wave generated?

Answer 19

Earthquakes and explosions

Question 20

What type of wave is an S wave?

Answer 20

Tranverse

Question 21

What type of wave is a P wave?

Answer 21

Longtitudinal

Question 22

What happens to waves at boundaries between the earth, core and mantle?

Answer 22

They are reflected

Question 23

What type od current does a generator supply?

Answer 23

Alternating

Question 24

How do we measure energy supplied to the mains?

Answer 24

kilowatt hours