1.
Below average rainfall for a prolonged period of time
Correct Answer
C. Drought
Explanation
Drought is a prolonged period of dry weather with significantly less rainfall than average, leading to water shortages. This can have devastating effects on agriculture, ecosystems, and human populations, causing crop failures, water scarcity, and economic hardship. Droughts can occur in various regions and climates, often exacerbated by factors like climate change and deforestation.
2.
A sudden movement in the earth's crust caused by movements of tectonic plates
Correct Answer
A. Earthquake
Explanation
Earthquakes occur when the Earth's tectonic plates suddenly shift or collide, releasing energy in the form of seismic waves. These waves cause the ground to shake, leading to tremors, shaking, and potential damage to structures. The intensity of an earthquake is measured on the Richter scale. Earthquakes can trigger secondary hazards like tsunamis and landslides, depending on their location and severity.
3.
The phenomenon of unusually cool ocean currents off the east coast of Australia
Correct Answer
D. El nino
Explanation
El Nino is a climate pattern characterized by unusually warm ocean temperatures in the Equatorial Pacific, which can significantly impact weather patterns worldwide. It is known to cause a wide range of effects, including increased rainfall in some regions, droughts in others, and shifts in ocean currents. The other options are incorrect as they refer to localized weather events or geological phenomena, not a large-scale climate pattern like El Nino.
4.
The point of the earths surface directly above where a earth quake occurs
Correct Answer
B. Epicentre
Explanation
The point on the Earth's surface directly above where an earthquake occurs is known as the epicenter. This is the location where the seismic waves originate and is typically the area of greatest damage. The epicenter is determined by analyzing the data from seismographs, which record the vibrations caused by the earthquake. By identifying the epicenter, scientists can better understand the source and magnitude of the earthquake, as well as assess the potential impact on surrounding areas.
5.
The forces of nature combine to become destructive
Correct Answer
B. Natural disasters
Explanation
Natural disasters are catastrophic events caused by natural forces, such as earthquakes, floods, hurricanes, and volcanic eruptions. These events can cause widespread destruction, loss of life, and economic disruption. The other options are incorrect because they refer to specific types of natural disasters or related concepts:
Natural hazard: A natural phenomenon that has the potential to cause harm, such as a fault line or a coastal area prone to hurricanes.
Landslide: A type of natural disaster where a mass of earth or rock slides down a slope.
Flood: A type of natural disaster where water overflows its natural or artificial banks, inundating land that is normally dry.
Flood plain: An area of land adjacent to a river or stream that is subject to flooding.
6.
A rapidly rotating coloum of air extending down from the clouds in the atmosphere
Correct Answer
E. Tornado/ twister
Explanation
A tornado, also known as a twister, is a rapidly rotating column of air that extends down from the clouds in the atmosphere. It is a violent and destructive weather phenomenon characterized by its rotating funnel-shaped cloud. Tornadoes are often accompanied by strong winds, heavy rain, and thunderstorms. They can cause significant damage to buildings, vehicles, and the environment in their path.
7.
When a natural hazard impacts on the community causing destruction of property and loss of lifes.
Correct Answer
B. Natural disasters
Explanation
When a natural hazard, such as a severe storm, flood, or tropical cyclone, impacts a community and causes destruction of property and loss of life, it is considered a natural disaster. Natural disasters refer to large-scale events that result from natural processes and have significant negative impacts on human populations and the environment. These events often require emergency response and recovery efforts to mitigate the damage and provide assistance to affected communities.
8.
Water inundates land that is normally dry
Correct Answer
E. Flood
Explanation
When water inundates land that is usually dry, it is known as a flood. Floods occur when there is an overflow of water from rivers, lakes, or oceans, or when heavy rainfall exceeds the capacity of drainage systems. This excess water spreads across the land, causing it to become flooded. Floods can have devastating effects, causing damage to infrastructure, homes, and crops, as well as posing risks to human lives. Therefore, the correct answer is flood.
9.
The leading edge of a bushfire blown in the directions of prevaling winds
Correct Answer
D. Firefront
Explanation
A firefront refers to the leading edge of a bushfire. When a bushfire is blown in the direction of prevailing winds, the firefront advances rapidly, causing the fire to spread quickly in that direction. This can be particularly dangerous as it can lead to the fire engulfing a larger area and making it more difficult to control or extinguish.
10.
An intense tropical storm that develops over the warm oceans near the equator
Correct Answer
A. Tropical cyclone
Explanation
A tropical cyclone is an intense tropical storm that develops over warm oceans near the equator. It is characterized by strong winds and heavy rain, and can cause significant damage and destruction. This type of storm is often referred to as a hurricane in the Atlantic Ocean and eastern Pacific Ocean, and as a typhoon in the western Pacific Ocean. It is a natural disaster that can result in widespread flooding and severe storm conditions.