eoy/gl science year 7
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17 Terms
Surface area
The total area on the outside of an object.
Balanced forces
Forces that are equal in size and opposite in direction.
Air resistance
A force that slows objects moving through air
Lift
The upward force that helps planes fly
Weight
The force caused by gravity pulling on an object
Mass
The amount of matter in an object
Gravity
The force that pulls objects towards a planet or a star
Mitochondria
Provides respiration for energy
Orbit
The path an object follows around another objects space
Thermal energy
Energy stored as heat
Nucleus
The part of a cell that controls it’s activities
Chloroplast
The part of a plant cell where photosynthesis happens.
Cell wall
A stiff outer layer that supports plant cells.
Cytoplasm
Jelly-like material where cell reactions happen.
Cell membrane
A thin layer controlling what enters and leaves the cell.