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