Exam Corrections

Question 1

The process which enables the growth of living things

Answer 1

Cell division

Question 2

Tissue

Answer 2

Cells working together to carry out a shared function

Question 3

Functions of transpiration

Answer 3

Cool the plant
Supplies leaves with water for photosynthesis
Supplies plant with minerals

Question 4

Retina

Answer 4

Absorbs light at the back of the eye

Question 5

Organisms that can make their own food( e.g. Green plants)

Answer 5

Producers

Question 6

Word equation for photosynthesis

Answer 6

Chlorophyll
Water + Carbon Dioxide ———–> Glucose + Oxygen
Light

Question 7

Word equation for reaction of chosen alkali metal with water

Answer 7

Lithium + Water —-> Lithium Hydroxide + Hydrogen Gas

Question 8

How to turn a mixture of iron filings and sulphur powder to a compound

Answer 8

Heat the mixture

Question 9

Compound formed from sulphur powder and iron filings

Answer 9

Iron sulphide

Question 10

How do a sodium atom and chlorine atom combine to form sodium chloride?

Answer 10

Oppositely charged ions attract.

Na+1 and Cl-1 —->NaCl

Question 11

Define lever.

Answer 11

Any rigid body which is free to turn about a fixed point called a fulcrum

Question 12

What structure joins bone to muscle

Answer 12

Tendon

Question 13

Two areas of industry where chemistry plays an important role

Answer 13

Medicine and plastics

Question 14

What material could a heating coil be made from

Answer 14

Iron/nickel

Question 15

How is voltage/current varied in the experiment for Ohm’s law?

Answer 15

Variable resistor

Question 16

Why does a persons hair stand up if touching a charged globe

Answer 16

Like charges repel and static electricity

Question 17

What is the purpose of a resistor

Answer 17

Limits current in a curcuit

Question 18

What is the average voltage of domestic alternating current in ireland

Answer 18

220-240V