Physical or chemical change?
Vocabulary
Atoms
Oil and water
True or false
100
change in color or weight
What is a physical change?
100
the measure of how compact matter is
What is density?
100
negatively charged
What are electrons?
100
oil is less _________ than water
What is dense?
100
Understanding matter allows scientists to design new technologies.
What is true?
200
tarnish on silver
What is a chemical change?
200
the application of knowledge to accomplish a goal
What is technology?
200
positively charged
What are protons?
200
oil ________ when added to water
What is float?
200
Designing new technologies is meant to make our lives more difficult.
What is false?
300
hydrogen peroxide bubbles in a cut
What is a chemical change?
300
a molecule that consists of TWO or more different elements
What is a compound?
300
no charge at all-neutral
What are neutrons?
300
a stone is more dense than water, so it_________
What is sinks?
300
The better scientists understand matter, the easier it is for them to design new technologies.
What is true?
400
a juice box in the freezer freezes
What is a physical change?
400
a useful representation of something that aids in studying it further
What is a model?
400
the atomic number of an element is the same number as the number of this in an atom
What are protons?
400
The chemical formula of salt
What is NaCl?
400
Peoples' choices determine whether the use of matter helps or harms people.
What is true?
500
the rust on an old bicycle
What is a chemical change?
500
the rearrangement of atoms within molecules to make new molecules with different properties
What is a chemical reaction?
500
what the protons and neutrons are inside of
What is the nucleus?
500
the chemical formula of water
What is H2O?
500
A person can use new technology for harm as easy as they can for good.
What is true.
M
e
n
u