Foundations Test Review
Which answer choice accurately explains why it is important to record the procedures and results of an experiment?
-so that you and your partners know what you did at every step - so that others can double check your work -so that others can repeat your experiment to see if they get the same results.
How many mm are in 760 nm?
.00076 mm
How many mg are in 1 μg?
.001
How many liters are in 25.7mL?
.0257 L
How many significant figures are in 3000?
1
950. × 20.0 Make the following calculation and record the final answer with the appropriate number of significant figures
1.90*10^4
Which of the following measurements is the smallest?
10 microL
centi
10^-2
what is the smallest division?
1ML
How many km are in 23,500 dm?
2.35 km
How many significant figures are in 0.0304?
3
Convert 3.58 liters to mL
3,580
Convert 3,417 meters to km.
3.417
How many cm can be found in 0.35 dm?
3.5 cm
Convert 316.71 km to meters.
316,710
A student designed an experiment that tested the rate at which air, sand , soil, and water heated under a heat lamp. This experiment was done every minute for 1 hour. How many different levels of the independent variable were tested?
4
How many significant figures are in 4.100 * 10^-9
4
Read the measuring device above. Choose the best answer below. Significant figures matter! (picture on desktop)
47
Convert 53.75 kg to grams
53,750
How many cg are in 0.055 hg?
550 cg
7800. × 100.0 = Make the following calculation and record the final answer with the appropriate number of significant figures
7.800*10^5
Convert 91.46 meters to cm
9,146
Convert 92.23 grams to mg.
92,230
A student designed an experiment that tested the rate at which air, sand, soil, and water heated under a heat lamp. This experiment was done every minute for 1 hour. Which of the following is the best hypothesis for this experiment?
Air will show the greatest increase in temperature because it has less mass to heat per particle.
theory
Explanation of things or events based on knowledge gained from many observations and investigations.
constant
Factor that does not change when other variables change.
Bill observes a dense object falling to the bottom of a container of water and then states that this object was more dense than the water in which it was placed. This statement is a(n)
Inference
hypothesis
Possible explanation for a problem using what you know and what you observe.
variable
Quantity that can have more than a single value.
model
Represents an idea, event, or object.
scientific law
Statement about what happens in nature and seems to be true all of the time.
In a classroom, during a visual inspection of a rock, a student recorded four statements about the rock. Which statement about the rock is an observation?
The rock is black and shiny.
A hypothesis provides which of the following in a scientific investigation?
a proposed explanation for the phenomena being investigated
A group of students is given the procedures for an experiment and data collected by another class that previously did the experiment. The group of students is asked to check the accuracy of the other class's data. How could the students check the other class's data for accuracy?
by repeating the experiment with the same procedures and comparing data
In order to isolate the relationship between two variables in an experiment, scientists must:
control the conditions under which the experiment is carried out.
mass/volume
density
When you decide whether or not the data supports the hypothesis, you are
drawing a conclusion
A and C HAVE..
equal densities
Ultimately, the end goal of the scientific method is to:
find and understand new knowledge
mud problem= what is an inference
footprints made by dog
what source of era....... botttom of meniscus
humane era
Place the following units from largest to smallest?
kilogram, hectagram, decigram, microgram
volume
liter
what is the dependent variable (fertilizer)
measuring the height of every two days.
Which metric prefix is 1/1000th of a base unit?
mili
smallest to largest
mililiter, liter, kiloliter
Which of the following metric prefixes is most likely to be used for the smallest measurements?
milli
During a student labatory..
observation
graphing data helps you recongnize..
patterns
In scientific investigations, which of the following steps is most likely to occur first?
posing questions
A well tested concept that explains a wide range of observations is
scientific theory
What is the main reason for clearly recording the procedures for an experiment?
so the experiment can be repeated
1,000,000,000,000
tera
which independent variable would have the LEAST effect on the results of an experiment designed to determine which type of paper airplane stays in the air the longest:
the color of the airplane
A study of a new cholesterol medication is being performed on 300 participants who volunteered for the study. The first group is given 90 mg of the drug. The second group is given 60 mg of the drug. The third group is given a sugar pill. What is the group that is given the sugar pill called?
the control group
What must an observer always use?
the senses
A study of a new cholesterol medication is being performed on 300 participants who volunteered for the study. The first group is given 90 mg of the drug. The second group is given 60 mg of the drug. The third group is given a sugar pill. If the scientist adds a fourth group that takes 120 mg of the drug, what has been altered?
they added a level of independent variable
Which statement best describes why is it important to record, in detail, each step of the experimental process?
to ensure my results are able to be replicated by other scientists
The data table below shows the results of an investigation. What information should be used for the column heading marked X?(picture on desktop)
trial number
What is the independent variable in the graph below?
x axis
What is the dependent variable in the graph below?
y axis
