Is a melted popsicle an example of a physical change? and why
What is YES? You can melt and refreeze a popsicle and it will still be a popsicle. (change in state of matter)
Is rust an example of a chemical change? and why
What is YES? You cannot change rust back into the metal is was before; therefore, it is a chemical change. (A NEW STUBSTANCE HAS BEEN FORMED)
Name the 3 states of matter.
What are SOLID, LIQUID, GAS?
High melting point and Malleability
what is a metal?
Name the two indicators of a chemical change.
What are color change, gas , temperature change, precipitate?
particle are tightly packed together, the volume and shape are fixed
what is a solid?
located on the bottom of the periodic table and expensive processing
what are Rare Earth Element
electricity and heat pass through elements well
what is conductivity?
These molecules can move freely and will take the shape of any container you put them in.
What is a LIQUID?
brittle and usually gases at room temperature
what is nonmetals?
True or False. Turning peanuts to peanut butter is an chemical change.
What is FALSE? To make peanut butter, you grind up roasted peanuts, so nothing new is being created.
The basic unit of matter
What is a atom?
located on the staircase, solid at room temperature but also brittle, Silicon(Si) is an example
what is metalloids?
the ability of an object to sink or float when compared to another substance
what is relative density?
CHALLENGE (not a quiz question) Explain how a rocket launch is an example of a chemical change.
What is the fuel combines with another chemcial to produce large volumes of a hot gas that propel the rocket into space?
tiny piece of matter formed when two or more atom combine
What is molecule?
element or compound: H20
what is a compound? (each element begins with a capital letter)