WorksheetsES ch 2 test(sections 1 & 2
Total questions: 20
Worksheet time: 11mins
In the law of conservation of matter ________ or __________ changes can take place in chemical reactions however, no atoms are created or destroyed.
physical
chemical
both of these apply
none of these apply
chlorine
Cl
N
P
S
Sulfur
Cl
N
P
S
nitrogen
Cl
N
P
S
phosphorus
Cl
N
P
S
Electrons are subatomic particles that carry a negative charge and are found in the nucleus
true
false
Matter is organized into atoms, ions, and molecules which together make up elements and compounds
true
false
Imagination, creativity and intuition are vital tools in science
true
false
The results in science can be (check all that apply)
tentative
reliable
unreliable
absolute truth
To understand patterns, scientists (check all that apply)
take measurements
experiment & create models
make careful observations
make random observations
A scientific theory (select all that apply)
has been widely tested
is supported by extensive evidence
is accepted as a useful explanation
is absolute truth
Science is always able to prove or disprove with 100% certainty how systems work in nature
true
false
A step in critical thinking is to look at evidence and evaluate it
true
false
A good scientist will be curious, skeptical, and always observing
true
false
Scientists discover how nature works through guessing and observing patterns
true
false
Matter has mass and takes up space in 4 physical states(solid, liquid, gas, & vapor)
true
false
Protons are in the nucleus and have no charge
true
false
The smallest building block of matter is an
atom
proton
electron
neutron
Carbon is an important element. What is the symbol for carbon?
CC
cc
c
C
To find out how nature works, scientists (check all that apply)
collect data
develop laws
develop theories
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