Lab Safety
Changes in Matter
The Atom
Random Science
100
True or False: You can wear flip flops or sandals in the lab?
FALSE
100
Is a chemical change usually reversible?
No. (ex. you can't unexplode a firework)
100
What do we call something that has mass and takes up space?
Matter
100
What do we call the process that plants use to get energy from the sun?
Photosynthesis
200
What must people with long hair do for lab day?
Tie it back
200
What are the three main states of matter?
Solid, Liquid, Gas
200
What does the atomic number tell us?
A) # of protons in the element
B) # of neutrons in the element
A) Protons
200
What is the strongest bone in the human body?
The femur (thigh bone)
300
During a lab, I should always be wearing my: ___________
Safety Glasses/Goggles
300
The statue of liberty in New York City was originally a shiny bronze colour. Is it turning green a chemical or physical change?
Chemical. The copper in the statue is oxidizing (similar to when iron rusts).
300
What is the center of an atom called?
The Nucleus
300
What is the hottest planet in our solar system?
Venus
400
What should you do if a chemical splashes in your eyes? (2 things)
1) Rinse with water at eye wash station
2) Tell your teacher
400
Cooking an egg is an example of a ________ change
Chemical change. The proteins in the egg are denaturing, so new substances are being formed.
Clues: change in colour, presence of bubbling
400
What weighs more? A Proton or an Electron?
A proton weighs almost 2000 times more than an electron does
400
What is the largest animal ever? (living or extinct)
The Blue Whale
500
What's wrong with this picture?
No safety goggles, chemical left open, chemical near edge of table, sharp hanging off lab bench, about to plug in a wet cord, lab coat hanging off eye wash station
500
Does this image show a physical or chemical change?
Physical. No new molecules are formed, they are just moved around
500
What do we call a substance that is made up of only one type of atom or molecule?
Pure Substance
500
If you could without dying, how long would it take to walk to the moon? (Answer is in years)
~9 years