science grade 7

• 1. A two-dimensional graphical representation of an area,land or sea, depicting physical features is map
• A three-dimensional spherical model of the earth is called a globe
• horizontal imaginary lines that run from east to west of a map or a globe is called Latitude
• Countries located in this zone experience a tropical climate where the annual average temperature is about 18°C is called tropics.
• Countries located in the zone experience four seasons is called artic circle,antarctic circle, tropic of capricorn and tropic of cancer.
• Countries located in these zones experience cold temperatures all year round is called polar/frigid zone.
• Vertical imaginary lines that run from North to South of a map or globe is called longitudes.
• System that is used to locate places using the degrees of latitude and longitude is called geographic coordinates system.
• The earth's atmosphere is divided into five layers based on their altitude above the surface of the Earth are called troposphere, stratosphere, mesosphere, thermosphere, exosphere.
• A layer of gases surrounding the Earth which absorbs most of the sun’s ultraviolet radiation is called ozone layer.
• The layer of air closest to the ground is called Troposphere.
• Stratosphere - The second layer above the troposphere
• Troposphere - The layer closest to the Earth’s surface
• Mesosphere - The third layer above the stratosphere
• The layer of air where temperature decreases with height is called Mesosphere.
• The layer of air where temperature increases with height is called Thermosphere.
• Thermosphere - The fourth layer above the mesosphere
• Exosphere - The fifth layer above the thermosphere
• Thermosphere - The fourth layer above the troposphere
• Mesosphere - The third layer above the troposphere
• Exosphere - The fifth layer above the troposphere
• Exosphere - The outermost layer of the atmosphere, which extends into space.
• Materials created and gathered from nature that humans used to survive and satisfy their need is called natural resources.
• That can grow again or can be replaced after it is consumed is called renewable resources
• Non-renewable resource are those that cannot be replenished once they have been depleted by human activities.
• Sources that cannot be replaced once consume is called non-renewable resources.
• A structure with walls and roofs made chiefly of a transparent material such as plastic or glass is called greenhouse.
• Describe the current rise and average temperature of earths air and ocean is called global warming.