Science XD Flashcards
what is the difference between hazard and risk
hazard- a danger associated with an object or chemical
risk-the possiblity of a danger happening
types of flames
safety flame
blue flame
roaring blue flame
what is the shape called which is ontop of a testube
miniscus
types of chemical hazards
corrosive
explosive
irritant
flameable
environment
toxic
oxidising
where do u put dependant and independant on a graph
dependant y
independant x
what did aristotle and ptolemy believe
earth was centre of the world while the sun and moon and 5 other planets orbited around it from east to west
what do the modern scientist believe about the solar system
sun was the middle of the solar system while the earth was one pf the planets which orbited it and that every planet while orbiting the sun was in an eleptical circut while spining around its own axis
What are the units of mass and weight?
mass-kg/g
weight-newton
what are the planets in out solar system
mercury
venus
earth
mars
juipter
saturn
uranis
neptune
what are stars
balls of fire which produce their own heat and light using nuclear fusion
