Review 1
A student says "I predict that water is a conductor of electricity." A scientist would classify this statement as:
A) a hypothesis.
B) an experiment.
C) a conclusion.
D) a fact.
A) Hypothesis
The sour taste of many foods is due to the presence of:
A) acids B) bases C) sugar D) water
A) Acids
Pure water has a pH of:
A) 7 B) 5 C) 3 D) 9
A) 7
"A body at rest tends to remain at rest, and a body in motion tends to remain in motion, unless acted upon by an unbalanced force" is a statement describing the law of:
A) forces B) gravity
C) inertia D) velocity
C) Inertia
What is the atomic symbol for gold?
A) G
B) Go
C) Au
D) Ag
D) Au
In an experiment, a factor that changes is called a:
A) control. B) hypothesis.
C) variable. D) check factor.
C) Variable
Recovering the salt from a mixture of salt and water could best be accomplished by:
A) evaporation
B) filtration
C) paper chromatography
D) density determination
A) evaporation
An element that is malleable, ductile, and a good conductor of electricity is most likely:
A) a metal B) a metalloid
C) a non-metal D) none of these
A) Metal
When heating liquid materials in laboratory glassware, a student should always:
A) wear safety goggles
B) use Benedict's solution
C) stopper the test tube
D) record the temperature of the liquid
A) Wear safety goggles
What is the total number of protons in the nucleus of an atom of potassium? (Atomic number)
A) 15
B) 19
C) 39
D) 42
B) 19
The logical and systematic process of solving a problem is known as:
A) an experiment.
B) the conclusion.
C) the scientific method.
D) a hypothesis.
C) Scientific Method
In which phase of matter are the molecules of a substance farthest apart from each other?
A) solid B) liquid
C) gas D) crystal
C) Gas
Which properties are characteristics of non-metals?
A) low heat conductivity and low electrical conductivity
B) low heat conductivity and high electrical conductivity
C) high heat conductivity and low electrical conductivity
D) high heat conductivity and high electrical conductivity
A) low heat conductivity and low electrical conductivity
Which of the following is used to measure volume of
a liquid?
A) ruler
B) graduated cylinder
C) triple beam balance
D) digital scale
B) graduated cylinder
A rock is determined to have a volume of 500 mL and a mass of 25 grams. What is the density of the rock?
A) .002 g/mL B) 20 g/mL
C) 500 g/mL D) .05 g/mL
D. .05 g/mL
List all the 6 step in the scientific method in order:
Question/ problem, research, hypothesis, experiment, observation/data, conclusions
What happens when elements chemically combine?
A) All elements retain their original properties.
B) New properties are formed.
C) Only metals retain their original properties.
D) New elements are formed.
D) New elements are formed
The total number of atoms in one molecule of the compound K3PO4 is:
A) 7 B) 8 C) 3 D) 12
B) 8
Which element is an inert (noble) gas?
A) bromine B) argon
C) sulfur D) oxygen
B) Argon
Find the volume of an irregular object using the graduated cylinder... you have 1 minute
Teacher determines if answer is correct
Come up and measure an item on the triple beam balance... you have 1 minute
Teacher determines correct answer
Using water displacement, find the volume of an item... you have 1 minute!
Teacher determines if answer is correct
In which list are the elements arranged in order of increasing atomic mass?
A) Cl, K, Ar
B) Fe, Co, Ni
C) Te, I, Xe
D) Ne, F, Na
A) Cl, K, Ar
A car travels a distance of 200 meters in 10 seconds. What is the average speed of the car during this 10 second interval?
A) 10 m/s B) 20 m/s
C) 100 m/s D) 200 m/s
B) 20m/s
Come up and find the mass of an object using the triple beam balance... you have 1 minute
Teacher determines if the answer is correct