Stephanie wants to measure the volume of an irregularly shaped object. What is the best way she can do it?
D) Fill a graduated cylinder halfway with water. Drop the object into the water. Measure the new volume of water. Subtract the initial volume of water from the final volume of water.
100
Chemical or Physical:
Reacts with acid
What is chemical.
100
Convert to a fraction:
0.32
What is 8/25.
100
All ___________ has mass and takes up space.
What is matter.
100
True or False:
Gravity exists between all masses and the amount of gravity between two masses increases as distance decreases.
What is true.
200
Shakita wants to know if the pH of an open can of soda changes over time. To test this, she designs an experiment that will involve the following steps.
1) Open a can of soda and measure the pH.
2) Allow the open soda can to rest undisturbed on a level countertop at room temperature.
3) Measure the pH of the open soda can every day at the same time for ten consecutive days.
What is the dependent variable in Shakita's experiment?
What is the pH of the soda.
200
Chemical or Physical:
Malleable
What is physical.
200
Calculate the area of a room that is 10m wide and 12m long. (Give correct units!)
What is 120meters squared.
200
What is the formula for density?
What is g/cm3 or g/ml.
200
Physical properties may be observed or measured without changing the identity of an object.
What is true.
300
Assume that a recent study found that some chemicals in hot dogs caused clogged arteries in rats. In a newspaper article reporting the study, a consumer group concluded that people should eliminate hot dogs from their diet. Which of the following is an appropriate question to ask regarding this conclusion?
1) Do rats and humans react the same way to the chemicals?
2) How much of the chemicals were the rats exposed to?
3) What type(s) of hot dogs were used in the study?
a) 1, 2, and 3
b) 2 and 3
c) 2
d) 1 and 3
What is A (1, 2, and 3).
300
Chemical or Physical:
dissolves in water
What is physical
300
What is the mean of hte following set of numbers?
7, 2, 3, 9, 2, 12, 3, 10
What is 6.
300
The curve at the surface of a liquid is called the __________.
What is meniscus.
300
Which of the following may be considered a hazard in the laboratory?
a) open-toed shoes
b) loose-fitting clothing
c) long hair
d) all of these
What is d) all of these.
400
Alexis was interested in the way mirrors reflect. The living room of Alexis' house had one big window in the front, and a very large mirror on the back wall. Alexis hypothesized that the room would heat up faster in the morning with the mirror on the wall than it would if the mirror were covered with a sheet that was the same color as the walls. What will make Alexis' hypothesis valuable?
a) it will be valuable only if it is proved correct.
B) It cannot be valuable because the investigation is in her house and not in the science lab.
C) It will be valuable only if it is proved incorrect.
D) Any testable hypothesis is valuable.
What is D) Any testable hypothesis is valuable.
400
Chemical or Physical:
flammable
What is chemical
400
What is the density of a chunk of metal that has a mass of 100g and a volume of 25 cm3? (Give correct units!)
What is 4 g/cm3
400
Which units are used to measure length?
a) liters
b) quarts
c) feet
d) ounces
What is feet.
400
Which of the following units would be most appropriate for measuring the length of time needed to travel from New York to Los Angeles by airplane?
a) minutes
b) hours
c) days
d) seconds
What is b) hours.
500
The chart below gives the percen tof the recommended daily allowance of different nutrients in a snack mix.
Iron = 28%
Vitamin A = 45%
Vitamin D = 18%
Calcium = 0%
Niacin = 23%
Which of the following conclusions can be drawn from the chart?
1) The snack mix is high in vitamin A.
2) The snack mix doesn't contain calcium.
3) The snack mix is not very nutritious.
4) The snack mix is fattening.
a) 1 and 2
b) 1, 2, 3, and 4
c) 3 and 4
d) 2 and 4
What is A) 1 and 2.
500
Chemical or Physical:
density
What is physical
500
.0038 g = __________mg
What is 3.8 mg.
500
What is the difference between a theory and an opinion?
What is C) A theory is supported by scientific evidence, while a theory is not.
500
A recipe for sugar cookies calls for 1/2 cup sugar and 1/4 cup of flour. Altogether, how much sugar and flour does the recipe call for?
a) .75 cups
b) .6 cups
c) .25 cups
d) .5 cups