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WorksheetsCONVECTION
Total questions: 10
Worksheet time: 5mins
What is convection
The movement caused within a fluid by the tendency of hotter and therefore less dense material to rise, and colder, denser material to sink under the influence of gravity
the process by which heat or electricity is directly transmitted through the material of a substance when there is a difference of temperature
a way in which something is usually done.
the emission of energy as electromagnetic waves or as moving subatomic particles, especially high-energy particles which cause ionization
what is convection currents
flow of atomic and subatomic particles and of waves, such as those that characterize heat rays, light rays, and X rays. All matter is constantly bombarded with radiation of both types from cosmic and terrestrial sources.
a current in a fluid that results from convection.
The term ionizing radiation refers to those subatomic particles and photons whose energy is sufficient to cause ionization in the matter with which they interact.
none of them
what is the application of convection currents
in nature , sea breeze and land breeze are examples of convection currents set up in air in coastal areas
Chimneys are fitted in factories to remove undesirable smoke and fumes . Being hot , and thus lighter these gases rise up and escape through the chimneys.
Ventilators are placed high up the walls of a room . The warm air containing carbon dioxide inside a the room rises up and cooler fresh air flows in through the ventilators
all of the above
in an ocean , warm water moves _____________and cold water moves _______.
up,down
Down,up
what causes wind
movement of low pressure to high pressure
movement of high pressure to low pressure
Any form of water that fall's to Earth's surface from the clouds are called what
Sublimation
Evaporation
Precipitation
Condensation
During the day , water from the ocean is transferred to the atmosphere . Which statement best describes the energy change that takes place during the transfer
Ocean waves speed up when energy is transferred from the ocean to the atmosphere
The atmosphere is warmed when energy is transferred from the ocean atmosphere
The ocean is cooled when energy is transferred from the atmosphere to the ocean
Adding salt to water will make the water ____________ dense compared to water without salt
more
less
Warm water in the ocean moves to wards the
Poles
Equator
Which one heats and cools faster
sea
land
both are the same
