a
b
c
d
100

the force exerted on a surface by the weight of the air above it

Pressure

100

a prolonged period of abnormally low rainfall, leading to a shortage of water

Drought

100

the place where something originates or is obtained

Source

100

having one's eyes covered

Blindfolded

200

a material that is used to produce heat or power, such as coal, oil, or gas

Fuel

200

a storm with a violent wind, in particular a tropical cyclone in the Caribbean

Hurricane

200

the outermost layer of the Earth, composed of solid rock

Crust

200

have enough money to pay for

Afford

300

a sudden and violent shaking of the ground, typically causing great destruction

Earthquake

300

an uncontrolled fire in a natural area, such as a forest or grassland

Wildfire

300

cultivated plants that are grown and harvested for food or other uses

Crops

300

 slightly wet; damp

Moist

400

the point on the Earth's surface directly above the focus of an earthquake

Epicentre

400

very great; intense

Severe

400

suffering from malnutrition, or lack of proper nutrition

Malnourished

400

flow over the brim or edge of something

Overflow

500

an overflowing of water onto normally dry land

Flood

500

requiring immediate action or attention

Urgent

500

a public event, typically held outdoors and featuring food, music, and entertainment

Fete

500

the outermost layer or boundary of an object

Surface