6th Grade Dec Final Science
What has mass and takes up space?
Air
(T/F) The ability to react with oxygen is a physical property.
False; Chemical Property
(T/F) Copper is used for wires because it is ductile. This is an example of a chemical property.
False; Physical Property
(T/F) Carbon Dioxide goes from a solid to a gas without becoming a liquid. This is a chemical change.
False; physical change
(T/F) Shape is a chemical property.
False; physical property
The _____ is the combination of all the forces acting on an object.
Net force
Chlorine- 35 and chlorine-37 have a different number of _____.
Neutrons
Force is measure is what units?
Newton
A hockey puck will slide across ice for a long time when hit.
Newton's First Law
The harder you pedal a bicycle, the faster it will go.
Newton's Second Law
The main reason a person can jump off the ground.
Newton's Third Law
A force is exerted on a box and an equal and opposite force is exerted by the box. What explains this?
Newton's Third Law of Motion
According to Newton's Third Law, forces always occur is equal but ______ pairs.
Opposite
Another term for technology is
applied science
All matter is made up of particles called _____.
atoms
When a peeled banana turns black, it is an example of a
chemical change
The force that resists motion between two objects that are in contact with each other is _______.
friction
In general, nonmetals are
gases at room temperature
a variable in an experiment that stays the same is a(n)
constant
to evaluate the observations you make, you must use
critical thinking
The _____ of water at room temperature is 1 g/cm squared.
density
What is a physical property?
density
One approach to identifying something unknown is to use a
dichotomous key
(T/F) Once a scientific model has been created, it cannot be changed
false
(T/F) a hypothesis is a decision based on the results of the experiment
false
(T/F) a speed that does not vary is called average speed
false
(T/F) all important scientific discoveries are made by profession scientists
false
(T/F) if the result of a study do not support a hypothesis, it means that the experiment failed
false
In general, metals are
good conductors of heat
The mass of an apple would be measures in ______.
grams
density depends on
mass and volume
Elements that have properties halfway between those of metals and non metals are classified as ______.
metalloids
When two pure substances are combines so that each of the pure substances retains its own properties, the result is a(n)
mixture
Most of the mass of an atom is found in its
nucleus
Water and hydrogen peroxide have different properties because
one contains a greater percentage of oxygen than the other
scientists must be impartial and not base their conclusions on
opinions
Color is a _______ property.
physical
Mass is a _____ property.
physical
Matter that has the same composition and properties throughout is called a(n)
substance
Know the Symbols for Carbon, Oxygen, Carbon monoxide and Carbon dioxide.
...
Know the units of force, average speed, work, acceleration, and distance.
...
When an object is at rest, what is it's speed?
0 m/s
The temperature at which water boils is ______.
100 degrees Celcius
The millions of compounds that exist are made from approximately ______ elements.
115
a certain atom has 26 protons, 26 electrons, and 30 neutrons. it's mass number is___
56
to calculate _______ you divide distance traveled by the time it takes to travel that distance.
Average Speed
A change in color is evidence of a ______ change.
Chemical
A pillowcase full of Halloween candy is a _____ mixture.
Heterogeneous
The three branches of science are _____, Earth and physical.
Life
______ measures the quantity of matter in an object.
Mass
The cord on a window blind.
Pulley
(T/F) Change of state is a physical change.
True
(T/F) Chemical properties can't be observed without changing the substance.
True
(T/F) In a physical change, the substance does not change its identity.
True
(T/F) Malleability is a physical property.
True
(T/F) When substances react. their mass remains the same after the reaction.
True
Your front teeth.
Wedge
the temperature at which a liquid becomes a gas is the
boiling point
Which of the following objects has the greatest inertia? baseball, pencil, toothpick, bowling ball.
bowling ball
A cake baking is an example of a _______ change.
chemical
Flammability is a _________ property.
chemical
a prediction about a problem that can be tested is a
hypothesis
A person in a head on car collision who is not wearing seat belt continues to move forward at the original speed of the car because of
inertia
to draw a conclusion based on something you observe is to
infer
What is the term for speed at any instant in time?
instantaneous speed
The mass of the products of a chemical reaction ______ the mass of the reactants.
is the same as
Chlorine-35 and chlorine-37 are examples of _____.
isotopes
Pieces of colored construction paper fade when left in the sunlight because the dye has the ability to react with ________.
light
The four states of matter are solid, _____ gas and ______.
liquid and plasma
The melting point of silver is a
physical property
Experiments and investigations must be
repeatable
The process of learning more about the natural world is
science
Machines can change the _____ of the force you apply and the _______ of the force.
size, direction
scientific ____ must be supported by observations and results from many investigations and are not absolute.
theories
How many atoms of calcium are in a unit of calcium phosphate whose formula is Ca3(PO4)2
three
(T/F) friction always acts in a direction opposite of motion
true
(T/F) it is often necessary to look at the same problem in different ways in order to find an answer
true
(T/F) the combination of all forces acting on an object is the net force
true
(T/F) the more mass an object has, the greater its inertia is
true
(T/F) variables are those factors that can be changes in an experiment
true
Newton's first law of motion states that an object at rest stays at rest unless a(n) _____ acts on it.
unbalanced force
the factor being measured in an experiment is the
variable