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Matter Review Christensen Class
Test Description: 1st semester review
Instructions: Answer all questions to get your test result.
1) What do scientists call the smallest unit of matter that has its own recognizable identity?
A
Molecule
B
Electron
C
Compound
D
Atom
2) How do scientists know matter is made of particles?
A
People have always known it
B
A famous scientist decided it was true
C
Experiments have proven it.
D
They can see them.
3) What do scientists call a substance that is made of two or more atoms bonded together?
A
Electron
B
Proton
C
Molecule
D
Atom
4) Which of the following is the best model of molecules in a gas?
A
Marbles frozen in a box
B
Marbles glued together in a ball
C
Marbles in a box
D
Marbles being shaken in a box
5) If a model were made of an atom with the nucleus the size of a pea, how large would the rest of the atom be?
A
the size of a basketball
B
the size of a house
C
the size of a football stadium
D
the size of a planet
6) Early chemists thought the parts of the atom were spread evenly throughout the atom. How has the model changed? We now know
A
most of the atoms’ particles are in the outer layer
B
that it is shaped like a cube
C
atoms are holding still
D
it has most of it’s mass in the center
7) Ancient people thought matter was made of Earth, wind and fire. What do we now know matter is made of?
A
air
B
nothing
C
atoms
D
electricity
8) Which would you use to determine the mass of an object?
A
Bathroom scale
B
Meter stick
C
Graduated cylinder
D
Triple beam balance
9) Which would you use to find the volume of a rectangular cube?
A
Triple beam balance
B
Meter stick
C
Bathroom scale
D
Graduated cylinder
10) Why does ice float on water?
A
it is lighter than water
B
it is harder than water
C
it is colder than water
D
it is less dense than water
*select an answer for all questions
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