Safety
Approved eye protection devices (such as goggles) are worn in the lab
any time chemicals, heat, or glassware are used
_____ is an example of both a color change and a new substance produced from a chemical change
a. shredder paper
b. wood chips
c. rust
d. melted wax
d. Rust
Heat travels from the sun to the earth by the process of
Radiation
What do positive ions do?
Lose electrons
Which of the following food item is likely the most acidic?
a. carrots
b. celery
c. milk
d. grapefruit
d. grapefruit
after completing an experiment, all chemical waste should be
disposed of according to your teachers directions
A substance with two or more elements that are combined in a fixed proportion.
compound
When a candle melts, it is a _______ change
Physical
An element plus additional element reacts to form one product is an example of which type chemical reaction.
Balanced forces..
a. have a net force of zero
b. do not have a change in motion
c. do not produce acceleration
d. all possible answers occur
d. all possible answers
Long hair in the lab
tied back, or kept entirely out of the way with a hair band.
What is the name of CaCl2
Calcium Chloride
Heat transfer by conduction occurs when..
Particles bump into each other
_____ are the substances that are produced in a chemical reaction
Product
A simple machine which uses a turning motion to tighten or make holes.
a screw
Horseplay or practical jokes in the lab are
always against the rules.
Ionic bonding is between a
metal and nonmetal
Heat travels from the sun to the earth by process of..
Radiation
Which of the following describes a solid?
Definite shape, definite volume
A simple machine where something rotates around a center point.
Wheel and axel
True/False: Hot glass looks the same as cold glass
True
What determines chemical reactivity?
a. Protons
b. Electrons
c. Neutrons
d. Isotopes
electrons
Temperature is a measure of the
Average kinetic energy of molecules in a substance
Wood is burned to heat a house. This is an example of the conversion of...
Chemical energy to thermal energy
What is work?
a. the place you have to go your entire life?
b. The result of moving an object a certain direction
c. An activity involving mental or physical labor
d. A task or undertaking.
b. the result of moving an object a certain direction.