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5th gr sci 2nd sem
5th grade Science 2nd Semester
Question | Answer |
---|---|
sun | largest star, source of all earth's energy, ball of plasma |
Earth | only planet that supports life |
reflection | waves bending off a surface |
mass | amount of matter in an object |
matter | anything that has mass and volume |
volume | amount of space an object takes up |
electric current | movement of electrons that flow |
kinetic energy | form of energy associated with motion |
potential energy | stored energy |
velocity | speed and direction of an object |
speed | rate or measure of motion |
displacement | how far an object has moved |
distance | how far an object has traveled |
acceleration | rate at which speed or direction is changing |
protons | positive charge |
nuetrons | no charge |
electrons | negative charge |
single atom | smallest part of an atom |
gases | spread to fill container, can be compressed |
liquids | not easily compressed, takes the shape of the container |
solids | keep shape, cannot be compressed |
minerals | solid material of earth's crust with a definite composition |
metamorphic rock | formed from heat and pressure inside the earth |
igneous rock | formed from magma |
sedimentary rock | materials cement together by chemicals or pressure |