WorksheetsYr 8 Science - Matter
Total questions: 60
Worksheet time: 30mins
Name
Class
Date
1.
What is matter? Choose the best answer.
a)
Anything that is solid
b)
Anything that takes up space
c)
Anything that has a fixed volume
d)
Anything that can be seen
2.
In what way are liquids different from solids?
a)
Liquid molecules are lighter than solid molecules
b)
Liquids are made of atoms; solids are made of
molecules
c)
Liquids don't have a fixed shape; solids do
d)
Liquids are always denser than solids
3.
What happens to the chemical structure of water when it changes state?
a)
Water molecules break apart to form individual
atoms
b)
Water molecules harden into ice molecules
c)
Water molecules melt into gas molecules
d)
Nothing happens to the chemical structure
4.
What will happen if you keep increasing both the pressure and temperature of a liquid?
a)
It will boil
b)
It will transpire
c)
It will melt
d)
It will solidify
5.
What do lightning and stars have in common?
a)
Both have no electrical charge
b)
Both contain plasma
c)
Both have a fixed volume
d)
Both contain all three states of matter
6.
Water's chemical formula is "H2O." What does this mean?
a)
Water is composed of hydrogen molecules and oxygen molecules
b)
A gram of water contains 20 hydrogen atoms
c)
Each water molecule contains two hydrogen atoms and one oxygen atom
d)
Water molecules cannot be split into smaller pieces
7.
What is the basic shape of a liquid?
a)
A sphere
b)
The same shape as a gas, only rounder
c)
A cube
d)
Whatever the shape of its container is
8.
How can you remove energy from matter?
a)
By increasing its volume
b)
By lowering its temperature
c)
By increasing its pressure
d)
By boiling it
9.
Gases have a tendency to expand. What's the best synonym for "expand?"
a)
Collide
b)
Spread out
c)
Shrink
d)
Boil
10.
Where would you find a Bose-Einstein condensate?
a)
Inside stars
b)
At the North Pole
c)
In a science lab
d)
Bose-Einstein condensates exist only in theory
11.
What are the three main states of matter?
a)
Solid, liquid, and gas
b)
Ice, water, and steam
c)
Temperature, pressure, and energy
d)
Hot, cold, and warm
12.
Compared to ice, how do molecules of water behave?
a)
They move less freely
b)
They are locked into a crystal lattice
c)
They move more freely
d)
They bounce off one another randomly
13.
What is matter?
a)
Anything that is visible
b)
Anything that has mass and takes up space
c)
Anything that reflects light
d)
Anything that absorbs light
14.
What do water vapor, liquid water, and ice have in common?
a)
The same crystal lattice structure
b)
The same amount of energy
c)
The same physical properties
d)
The same chemical properties
15.
What's the easiest way to add energy to matter?
a)
Heating it
b)
Cooling it
c)
Decreasing pressure
d)
Decreasing temperature
16.
The melting point of H2O is 0 degrees Celsius. This is the same as its:
a)
Boiling point
b)
Vaporization point
c)
Fusion point
d)
Freezing point
17.
What is it called when a solid turns directly into a gas?
a)
Sublimation
b)
Vaporization
c)
Melting
d)
Fusion
18.
Dry ice has the same chemical properties as what gas?
a)
Helium
b)
Hydrogen
c)
Nitrogen
d)
Carbon Dioxide
19.
How do the molecules of a gas behave?
a)
They vibrate in place
b)
They bounce around randomly
c)
They are locked in a crystal lattice
d)
They clump together
20.
If you put a thermometer into a pot of melting ice, when will the temperature rise past zero?
a)
As soon as the ice begins to melt
b)
After most of the ice has melted
c)
When the ice begins turning into steam
d)
When all the ice has melted
21.
How do scientists know how atoms are structured?
a)
By looking at them under a microscope
b)
By running experiments that expose their properties
c)
By examining only the largest atoms
d)
By splitting them apart
22.
What can you conclude from the fact that scientists continue to update the atomic model?
a)
New information about atoms continues to be discovered
b)
Old information about atoms is completely useless
c)
Scientists did not have any information about atoms until a few years ago
d)
Scientists still have no idea what atoms look like
23.
What contribution did John Dalton make to atomic theory?
a)
He discovered that every atom was positively charged
b)
He discovered that every element consisted of one type of atom
c)
He discovered that atoms had nuclei
d)
He discovered that atoms could be divided into smaller parts
24.
Place the following scientists in order, from earliest to latest:
A) Ernest Rutherford;
B) J.J. Thomson;
C) John Dalton
A) Ernest Rutherford;
B) J.J. Thomson;
C) John Dalton
a)
B, C, A
b)
C, A, B
c)
A, C, B
d)
C, B, A
25.
The majority of an atom's mass exists where?
a)
In the nucleus
b)
In the electron cloud
c)
In the space between the nucleus and the electrons
d)
In the neutrons
26.
What are electrons?
a)
Positively charged particles
b)
Neutrally charged particles
c)
Negatively charged particles
d)
Uncharged particles
27.
Ernest Rutherford discovered that atoms were mostly:
a)
Negatively charged
b)
Positively charged
c)
Electrons
d)
Empty space
28.
What does the nucleus of an atom contain?
a)
Electrons and neutrons
b)
Protons and neutrons
c)
Neutrinos and positrons
d)
DNA and RNA
29.
How are neutrons different from protons and electrons?
a)
They are more massive than protons and electrons
b)
They have no electrical charge
c)
They are less massive than protons and electrons
d)
Protons and electrons exist in atomic nuclei;
neutrons orbit the nucleus in a "cloud"
30.
How are electrons arranged in an atom?
a)
In groups of five
b)
In energy levels
c)
By color
d)
By shape
31.
What is the significance of the periodic table of elements? Choose the best answer.
a)
It lists all the different metals known to humans
b)
It predicts and lists all the chemical elements in the universe
c)
It explains where different atoms can be found
d)
It proves that atoms are the building blocks of
matter
32.
What do electrons in the same shell have in common?
a)
They have the same amount of energy
b)
They are all positively charged
c)
They are all made up of atoms
d)
They all have neutral charges
33.
Which of the following is an example of a subatomic particle?
a)
Carbon
b)
Oxygen
c)
Electron
d)
Hydrogen
34.
What might happen if the strong force didn't exist?
a)
Electrons would have positive charges
b)
Atomic nuclei would fly apart
c)
It would be more difficult to split atoms
d)
Neutrons would not exist
35.
What two types of particles exist within an atomic nucleus?
a)
Protons and neutrons
b)
Neutrons and electrons
c)
Protons and neutrinos
d)
Positrons and neutrons
36.
Oxygen has an atomic number of 8. What can you conclude from this fact?
a)
An atom of oxygen weighs 8 grams
b)
An atom of oxygen has 4 protons and 4 electrons
c)
An atom of oxygen has 8 positrons
d)
An atom of oxygen has 8 protons
37.
The word "atom" comes from a Greek word for "indivisible." In what way are atoms indivisible?
a)
They cannot be separated once they've bonded withother atoms
b)
They cannot be broken apart without losing their
chemical properties
c)
They cannot form bonds with other atoms
d)
They cannot gain or lose electrons
38.
How are molecules different from atoms?
a)
They consist of several atoms bonded together
b)
They do not contain neutrons
c)
They do not have nuclei
d)
Their particles do not have electrical charges
39.
What can you conclude from the fact that electrons orbit far away from atomic nuclei?
a)
Electrons are extremely small
b)
Atoms are comprised mostly of empty space
c)
Protons have a positive charge
d)
Atoms consist of subatomic particles
40.
In the following diagram, what does the number 12 represent?
a)
An atomic number
b)
A number of electrons
c)
An atomic mass
d)
A chemical symbol
41.
Fluorine has an atomic number of 9. What can you conclude about an atom of fluorine from this fact?
a)
It has nine protons
b)
It weighs nine grams
c)
It has nine electron shells
d)
It has a boiling point of 9 degrees Celsius
42.
In what part of an atom can protons be found?
a)
Inside the electrons
b)
Inside the neutrons
c)
Inside the atomic nucleus
d)
Inside the electron shells
43.
Since atoms are very small, what can you infer about atomic mass units?
a)
One atomic mass unit is equivalent to a gram
b)
One atomic mass unit is much lighter than a gram
c)
One atomic mass unit is much heavier than a gram
d)
Atomic mass units and grams measure different
properties
44.
If a sulfur atom has 16 protons, 16 electrons, and 16 neutrons, its atomic mass is:
a)
16
b)
32
c)
48
d)
64
45.
An atom of fluorine has an atomic mass of 19u. Keeping in mind that its atomic number is 9, what can you infer about this atom?
a)
It has nine neutrons
b)
It has ten electrons
c)
It has ten neutrons
d)
t has ten protons
46.
If a hydrogen atom has 1 proton, 1 electron, and 1 neutron, its atomic number is:
a)
1
b)
2
c)
3
d)
4
47.
On the periodic table, how is atomic mass represented?
a)
As an average of the mass of different isotopes
b)
As the exact mass of every atom
c)
As the mass of the most common isotope
d)
As the masses of all the protons added together
48.
What do carbon-12 and carbon-14 have in common?
a)
They have the same number of protons
b)
They have the same number of neutrons
c)
They have the same atomic mass
d)
They have the same atomic weight
49.
How is carbon-12 different from carbon-14?
a)
They have a different number of protons
b)
They have a different number of electrons
c)
They have a different number of neutrons
d)
They are different elements
50.
What can you conclude about carbon-14 from its name?
a)
It has 14 electrons
b)
It has 14 neutrons
c)
It has 14 protons
d)
It has an atomic mass of 14u
51.
Carbon has an atomic number of 6. What can you conclude about carbon from this fact?
a)
It has six protons
b)
It has six neutrons
c)
It has six electrons
d)
It has six positrons
52.
What do the orange and yellow spheres represent in this model of an atomic nucleus?
a)
Gluons and leptons
b)
Protons and neutrons
c)
Positrons and electrons
d)
Atoms and molecules
53.
What do the elements highlighted in red have in common?
a)
The same number of protons
b)
The same number of electrons
c)
The same number of neutrons
d)
The same number of electron shells
54.
Which of the following is a true statement?
a)
Periods form horizontal rows; groups form vertical
columns
b)
Groups form horizontal rows; periods form vertical
columns
c)
Categories form horizontal rows; gases form vertical
columns
d)
Gases form horizontal rows; categories form vertical
columns
55.
What is true of all molecules?
a)
They have electrochemical charges
b)
They lack electrochemical charges
c)
They have full outer electron shells
d)
They contain at least one proton
56.
If you wanted to find a sample of fermium, which has an atomic number of 100, where would you look?
a)
Deep within the Earth
b)
In the Earth's atmosphere
c)
In outer space
d)
In a science lab
57.
To become positively charged, an atom must:
a)
Gain a proton
b)
Lose a proton
c)
Gain an electron
d)
Lose an electron
58.
If someone described a coin as "lustrous," what would he mean?
a)
It was durable
b)
It was tarnished
c)
It was hard
d)
It was shiny
59.
What can you infer from the fact that metals are good conductors of electricity?
a)
Electrical appliances made of metal are dangerous
b)
Most electrical wiring is made of metal
c)
All non-metallic objects, like water and the human
body, are poor electrical conductors
d)
Metals also make good insulators
60.
How is mercury different from every other metal on the periodic table?
a)
It's liquid at room temperature
b)
It doesn't conduct electricity
c)
It has no luster
d)
It is totally inelastic
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