Lab Safety
What three things must you always wear in the lab?
Goggles, gloves, aprons
What is the name for the way an item or substance interacts with fire?
Flammability
What state of matter has the most thermal energy?
Gas
What are the three states of matter called?
Solids, liquids, and gasses.
What were the two main ingredients in most home-made bath bomb recipes?
Citric acid and baking soda
What should you do if there is broken glass?
What is ventilation?
Allowing gas or air to exit a system
What is the name of a reaction system that absorbs heat?
What is a property that you can see or touch?
Physical property
Name one combination of reactants that causes an exothermic reaction.
Steel wool & vinegar
OR
Aluminum foil, copper sulfate, saltwater
Absolutely not
What is density?
How much of a substance fits in a certain space.
What is a noble gas?
An element with full outer shell. They will not bond with other elements.
What kind of change happens when you cut paper?
Physical change
What is the law of conservation of matter?
Matter cannot be created or destroyed, only changed.
What should you do if you get chemicals in your eye?
DAILY DOUBLE:
What subatomic particle is used in atomic bonding?
Valence electrons
(Just electrons--> Half points)
If you put an ice pack on your head, which direction would the thermal energy travel?
From your head towards the ice pack.
What kind of change happens when you burn a match?
DAILY DOUBLE:
What happens when you increase the amount of reactants in a chemical reaction?
Yields a stronger reaction
How should you dispose of lab materials.
According to teacher instructions
What is thermal energy?
The motion of atoms within a substance
What is the difference between heat and temperature?
"heat" refers to the transfer of thermal energy between objects with different temperatures, while "temperature" is a measurement of the average kinetic energy of the particles within an object, indicating how hot or cold it is
Sudden temperature changes, gas bubbles, and color changes are all signs of a....
Chemical change
Explain how tested if bath bomb gas was lighter or heaver than air.
Lit match over reaction and poured gas on lit candle. Checked for extinguishment