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