8th Grade Physical Science Chapter 1
The World of Physical Science
1. Physical science is often divided into which two branches of science?
biology and botany
chemistry and physics
geology and astronomy
ecology and oceanography
2. Which of the following statements about physical science is true?
Physical science cannot be applied to everyday life.
Physical science plays no role in other branches of science.
All scientists are physical scientists.
Physical science is important in many branches of science and in
everyday life.
3. Which statement best describes the scientific method?
The scientific method is a flexible set of steps that is used to solve problems.
The scientific method is a rigid series of steps that must be followed by every
scientist.
The scientific method is the process by which a hypothesis becomes a theory.
The scientific method fails if a hypothesis is not supported.
4. Cleo measured the density of an aluminum can, a copper penny, and a gold nugget. Which
of the following statements is a conclusion supported by her data?
Aluminum has a silvery color.
Aluminum cans are easy to bend.
All pennies have a mass of 3.1 g.
The gold nugget has the highest density of the objects tested.
5. Which of the following is an example of a model?
the sun
a globe
a duck
a fluorescent lamp
6. Why is it important to communicate the results of
an experiment?
Other people can learn from the experiment.
Mistakes that were made during the
experiment can be avoided in the future.
Scientific knowledge can grow from the
experiment.
all of the above
7. Which statement best describes the difference between a scientific theory and a scientific law?
A theory is an explanation of observations, and a law is a summary of experimental results.
A theory becomes a law when enough time has passed.
A theory becomes a law when enough scientists have agreed that the theory is true.
A law is a combination of several theories.
8. An experiment that includes two groups and has a difference in only one factor is called a
hypothetical experiment.
controlled experiment.
factored experiment.
group experiment.
9. Volume can be measured in
milliliters.
square meters.
milligrams.
centimeters.
10. Density is equal to
area x height.
length x width.
mass/volume.
mass x volume.
11. The SI units of measurement are based on the number _________________________ .
12. Physical science is the study of matter and _______________________________________.
13. The SI unit of temperature is the
_______________________________________________.
14. One liter is equal to ___________________________-ml.
15. The statement "The grass is green" is an example of a(n) ___________________________________.