Nature of Science
Physical Prop. of Matter
Mass vs. Weight
Acids & Bases
Density
100
A __________ explains, a ___________ describes.
A.) Law, Theory
B.) Theory, Law
C.) Hypothesis, Law
D.) Theory, Hypothesis
B.) Theory, Law
100
What is a physical property of silver?
A) Density
B) Tarnishes
C) Reacts with Nitric Acid
D) Does not react with water
A) Density
100
Which measures the mass of an object?
A) A spring scale (in N)
B) A height scale (in feet)
C) A graduated cylinder (in mL)
D) A triple beam balance (in grams)
D) A triple beam balance (in grams)
100
The pH scale runs from 0 to 14, and is an indication of how acidic or basic a solution is. A pH close to zero indicates a(n) _______ solution, and a pH near 14 indicates a(n) _______ solution.
A) acidic; basic
B) basic; acidic
C) neutral; basic
D) acidic; neutral
A) acidic; basic
100
Which is a unit of density?
A) cm3/g
B) g/cm
C) g/cm3
D) ml/g
C) g/cm3
200
What happens if new scientific evidence does not fit an already published theory?
A.) New theories are always true.
B.) Old theories must be thrown out.
C.) New theories are always better than old theories.
D.) Old theories can be modified with new scientific evidence.
D.) Old theories can be modified with new scientific evidence.
200
Iron filings were mixed together with salt crystals. What unique property of iron would be BEST to separate the filings from the salt?
A) Color
B) Texture
C) Magnetism
D) Melting point
C) Magnetism
200
Which of these is not true about weight?
A) It is a measurement of how heavy an object is.
B) It is always the same as mass, regardless of gravity.
C) It is affected by an object's mass and the force of gravity.
D) It is commonly measured in pounds.
B) It is always the same as mass, regardless of gravity.
200
Milk of magnesia is a base. What happens when you drink milk of magnesia for an upset stomach?
A) It raises the pH of your stomach.
B) It lowers the pH of your stomach.
C) It cleanses the stomach of harmful, painful bacteria.
D) It coats the walls of your stomach with a protective layer.
A) It raises the pH of your stomach.
Milk of magnesia raises the pH of your stomach. This is because the pH of your stomach acid is well below 7 (very acidic- lower pH is acidic). Adding something with a high pH (very basic) will neutralize the upset stomach.
200
What two quantities must be known to calculate the density of a sample of matter?
A) mass and volume
B) length and mass
C) size and weight
D) weight and volume
A) mass and volume
300
An experiment in science class was conducted to determine the time it takes different types of fruit to spoil in darkness. Each piece of fruit; an orange, an apple, a pear, and a banana were placed in different dark rooms at different temperatures. The table shows the observations collected by the students after five days.
Which best describes an error the students made in the experiment?
A.) five days is too long
B.) too many types of fruit
C.) only done in dark rooms
D.) different room temperatures
D.) different room temperatures
300
Two cups of the same size are filled to the brim with clear liquids. Only one container holds water. The other contains a liquid that has greater density than water. How could you safely identify the container holding the water?
A) See which cup feels heavier.
B) Taste the liquid in both cups.
C) Touch the liquid in both cups.
D) Add salt to the liquids to see if it dissolves.
A) See which cup feels heavier.
300
What is the mass of the beaker and fluid on the triple beam balance?
A) 10.21 g
B) 200.11 g
C) 210.91 g
D) 211.91 g
C) 210.91 g
300
Which phrase can accurately be placed in the middle, within both circles?
A) Has a pH of 7
B) Dissolves metals
C) Ionizes in water
D) Turns red litmus paper blue
A) Has a pH of 7
300
If we compare and contrast the three liquids seen in the jar, the BEST explanation would be that
A) Oil is lighter than water and syrup.
B) Syrup is the thickest liquid of the three.
C) Oil is the least buoyant of the three liquids.
D) Water is denser than oil but less dense than syrup.
D) Water is denser than oil but less dense than syrup.
400
Your science class teacher takes a cupcake and a lead pipe to the roof of the school in order to perform an experiment. The experiment is to find out which item will fall to the ground faster. The lead pipe is much heavier than the cupcake.
You predict that the lead pipe will fall faster, because it is heavier.
When they are dropped, you observe that they hit the ground at almost exactly the same time.
How did your prediction compare with the result?
A.) The prediction was not accurate, according to the results.
B.) The result was not accurate, according to the prediction.
C.) The prediction was accurate, according to the results.
D.) The result was accurate, according to the prediction.
A.) The prediction was not accurate, according to the results.
400
Which physical property would be the same as a substance’s melting point?
A) Solubility
B) Boiling point
C) Specific heat
D) Freezing point
B) Boiling point
400
As an astronaut goes out into space (not on another planet but in space), her mass _______________ and her weight ____________________.
A) Increases, decreases
B) Decreases, increases
C) Stays the same, increases
D) Stays the same, decreases
D) Stays the same, decreases
400
-Pepsi
-Vinegar
-Orange Juice
What property do all three of these common household substances have in common?
A) They are all acidic.
B) They all taste bitter.
C) They all have a pH above 7.
D) They all turn litmus paper blue.
A) They are all acidic.
400
50 ml of water is poured into a beaker. 50 ml of another liquid is poured into the same beaker. The beaker is left undisturbed for some time. After some time, it is observed that the liquid forms a clear layer on top of water. If the density of water is 1 g/cc, what could be the density of the second liquid?
A) 0.8 g/cc
B) 1 g/cc
C) 1.8 g/cc
D) 1.12 g/cc
A) 0.8 g/cc
500
Joe and Angie have the same math grades. Joe and Angie wondered if studying while listening to music might affect their grades. Joe listened to music while he studied while Angie studied in silence. After two weeks, they took the same math test and Joe scored higher than Angie. They came to the conclusion that listening to music will improve grades. What comment would you make to Joe and Angie about their experiment?
A.) They should have tested more people.
B.) Joe was already better at math than Angie.
C.) This topic has already been studied before.
D.) They should have chosen a different subject besides math.
A.) They should have tested more people.
500
Which element is LEAST likely to be metallic?
A) A
B) B
C) C
D) D
A) A
500
In which situation would an object weigh the LEAST? (Assume all the objects have the same mass)
A) An object on Earth
B) An object on the moon
C) An object half-way between the Earth and moon
D) An object in space closer to the moon than the Earth
C) An object half-way between the Earth and moon
(There is less gravitational pull if the object is not near something with a large mass, like the Earth or moon. As an object approaches either the Earth or moon, the weight, or gravitational pull, would increase).
500
Phenolphthalein solution is used as an indicator of acids and bases. If added to an ammonia-based solution of window cleaner, we would expect the solution to turn
A) blue.
B) brown.
C) pink.
D) yellow.
A) blue.
500
Jenny accidentally drops her ring into a graduated cylinder. If the ring has a mass of 5 grams and the water level in the cylinder rises from 5 ml to 7.5 ml, determine the density of the ring.
A) 2 g/ml
B) 50 g/ml
C)15 g/ml
D) 0.5 g/ml
A) 2 g/ml
First you find the volume of the ring through water displacement: 7.5 ml -5 ml = 2.5 ml.
Mass is 5 grams.
Mass/Volume is Density
5 grams/2.5 ml = 2 g/ml