1
A prediction or statement that can be tested is a(n)
hypothesis
In which section of a lab report would observations and measurements be recorded?
Conclusion
Data
Introduction
Analysis
A chart showing the amount of rain each month in a region is an example of a scientist's
conclusions.
inferences.
data.
variables.
What is Volume?
The amount of space something takes up.
Pounds.
An explanation based on observations and experimentation.
The amount of matter in an object.
The density of a 39 gram object with a volume of 5 cm3 is
7.8 g/cm
3195 g/cm
334 g
44 cm3
What is a well-tested concept that explains a wide range of observations?
Scientific Theory
In scientific investigations, which of the following steps is likely to occur first?
Forming conclusions
Asking questions
Communicating results
Designing experiments
When you decide whether or not the data support the original hypothesis, you are
drawing a conclusion.
posing a question.
making an observation.
making an inference.
Which of the following would best be measured in grams?
An elephant
A computer
A box of tissues
A truck
Write the number 6926300000.0 in scientific notation.
6.92 X10 expontent9
The type of data that includes descriptions is known as
Qualitative Data
Which skill are you using when you use your five senses to gather information?
Designing experiments
Developing hypotheses
Observing
Posing questions
What is the SI unit of temperature called?
Celsius
Volume
Fahrenheit
Kelvin
How many meters are in 2.5 kilometers?
2,500,000
2500
2.50
0.0000025
The density of an object is
the mass divided by the volume.
(D = m/v)the same as the size of the object.
the volume divided by the mass.
(D = v/m)the same as its weight.
Which statement best describes a controlled experiment?
It shows the effect of a dependent variable on an independent variable.
It eliminates the need for a dependent variable.
It tests the effect of a single independent variable.
It avoids the use of variables.
What characteristic must be true of a good hypothesis?
It must have been observed many times.
It must involve quantitative data.
It must be testable by observation or experiment.
It must be correct.
The prefix meaning thousand (1000) is called
kilo-milli-deci-centi-
How many millimeters are in 3 centimeters?
100
1000
300
30
A carrot floats in salt water, but sinks in fresh water. This is because
A larger piece of carrot has a different density.Fresh water is more dense than salt water.Salt water is more dense than fresh water.The carrot is more dense than salt water.
An experiment was carried out to determine whether drinking caffeinated soda increases pulse rate. The pulse rates of two groups of people at rest were measured. Group A was then given caffeinated soda and Group B was given caffeine-free soda. One hour after drinking the soda, the pulse rates were measured. The participants in the experiment were all the same age, and they were all given the same amount of soda. The dependent variable in this experiment is the
A amount of soda given to each group.
B type of soda given to each group.
C pulse rate of each group.
D age of participants in each group.
When a scientist shares his or her findings with other scientists, the scientist is
communicating.
hypothesizing.
theorizing.
experimenting
What is mass?
The amount of space something takes up.
Pounds.
An explanation based on observations and experimentation.
The amount of matter in an object.
Which instrument would be best suited to measure volume of a liquid?
A digital scale
A graduated cylinder
A ruler
A thermometer
Which of the following is a valid reason why a scientist might reject a scientific theory?
It covers too broad a topic.
New evidence contradicts it.
Some people disagree with it.
It is too old.