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Density
Changes in Matter
Classification of Matter
Physics
100
In the lab there are many pieces of safety equipment. Name two important safety items you wear during labs.
Goggles, gloves, apron, etc.
100
The difference between mass and weight is the force of …
What is gravity
100
The change in matter in which the substance(s) remain the same identity Example: Dissolving salt in water
What is Physical Change
100
Atoms that are identical are called elements. Elements are classified as either metals, nonmetals or …
metaloids
100
What one word describes the idea that an object at rest stays at rest and an object in motion will stay in motion in the same speed and direction?
Inertia
200
All incidents in the lab, no matter how minor, must be reported to: a. the principal b. the custodian c. the teacher
the teacher
200
The formula for density is …
D=M/V (Density=mass/volume)
200
Which type of change is easier to reverse?
What is physical
200
A type of matter that can be easily separated by physical means is called a …
mixture
200
If you double the force acting on an object, what will happen to its acceleration? a. Increase b. Decrease c. Stay the same
acceleration will increase
300
Elements that are most alike are found in the same a. Period b. Group
a. group
300
The density of water is … BE SURE YOUR ANSWER INCLUDES A NUMBER AND UNITS!
1 g/cm3 (1 g/cc) or 1 g/ml
300
During a phase change such as melting or boiling what happens with temperature? a. Increases b. Decreases c. Stays the same
Stays the same
300
A chemical combination of matter that has a definite ratio is known as a compound. Which of the following substances is a compound? a. Milk b. Tap water c. Salt
salt
300
For every action there is an equal but opposite reaction. This statement describes Newton’s Third Law. Which motion is an example of this law? a. An apple falling from a tree due to gravity b. Kicking a soccer ball vs. a bowling ball c. Jumping on a trampoline
c. Jumping on a trampoline
400
The number of neutrons in an atom of an element can be found by subtracting atomic mass by _________________.
What is the atomic number
400
When placed in water, a substance with a density of 2.5 g/cc would … a. Float b. Sink
sink
400
If you burn 10 grams of paper in a CLOSED system, what will the mass of the trapped smoke and ash be? a. Less than 10 grams b. More than 10 grams c. Exactly 10 grams
exactly 10 grams
400
Before heating the copper and sulfer in a test tube which classification of matter applies? a. Element b. Compound c. Mixture
mixture
400
If friction (in the form of air resistance ) is eliminated – objects will fall according to their masses. TRUE or FALSE
False
500
Heat transfer through a liquid or gas is known as … a. conduction b. convection c. radiation
What is convection
500
As most substances heat up their volume increases, which causes their density to … a. Increase b. Decrease c. Stay the same
decrease
500
Does this expression show a physical or chemical change: Cu + S --> CuS
chemical change
500
What is the correct order for separating a mixture of sand, salt, and iron filings. a. Add water, evaporate, filter, use magnet b. Add water, filter, evaporate, use magnet c, Use magnet, add water, filter, evaporate
c, Use magnet, add water, filter, evaporate
500
An object is accelerating if it is changing velocity. How do objects change their velocity? a. Changing speed b. Changing direction c. Changing either speed, direction or both
changing speed