Problem 6
Name an example of a field that is not considered a science.
Problem 6
Does each statement represent a physical change or a chemical change? a) Graphite, a form of elemental carbon, can be turned into diamond, another form of carbon, at very high temperatures and pressures. b) The house across the street has been painted a new color. c) The elements sodium and chlorine come together to make a new substance called sodium chloride.
Problem 7
Which of the following fields are studies of the natural universe? a) biophysics (a mix of biology and physics) b) art c) business
Problem 7
Distinguish between an element and a compound. About how many of each are known?
Problem 8
Which of the following fields are studies of the natural universe? a) accounting b) geochemistry (a mix of geology and chemistry) c) astronomy (the study of stars and planets [but not the earth])
Problem 8
What is the difference between a homogeneous mixture and a heterogeneous mixture?
Problem 9
Identify each as a heterogeneous mixture or a homogeneous mixture. a) Salt is mixed with pepper. b) Sugar is dissolved in water. c) Pasta is cooked in boiling water.
Problem 9
Which of these statements are qualitative descriptions? a) The Titanic was the largest passenger ship build at that time. b) The population of the United States is about 306,000,000 people. c) The peak of Mount Everest is 29,035 feet above sea level.
Problem 10
Identify each as a heterogeneous mixture or a homogeneous mixture. a) air b) dirt c) a television set
Problem 10
Which of these statements are qualitative descriptions? a) A regular movie ticket in Cleveland costs \(\$ 6.00\). b) The weather in the Democratic Republic of the Congo is the wettest in all of Africa. c) The deepest part of the Pacific Ocean is the Mariana Trench.
