An element is

a. the smallest particle of matter

b. a substance with only one type of atom

c. a solid form of a substance

d. the smallest particle of an atom

A section of the crust moves under another section of crust without changing the land above. From the surface thebprocess would seem to be

What part of a refracting telescope would you measure to find the aperture? * the eyepiece the body the large lens the mirror

When blood passes through the lungs, carbon dioxide and water are formed from carbonic acid dissolved in the blood. The carbon dioxide formed passes into the lungs and is exhaled. H2CO3 H2O + CO2 What kind of reaction has occurred?

Because a chemical we will smell needs to diffuse into the fluid surrounding the olfactory receptors, which of the following substances would not be able to be detected? Lipids, proteins, amino acids or sugars

A student stirs a mixture of sand, iron filling, and water and observes that eventually the sand and iron fillings sing to the bottom of the container. How can the student separate the mixture?

Which statement best describes a bacterial cell? A It contains more than one cell. B It is a complete organism. C It is part of a larger organism. D It contains different kinds of cells

Lithium (Li) and oxygen (O) are both in period 2. They both have? a. similar properties b. the same number of protons c. two electron shells d. the same number of electrons

What compares a law and a theory?

Explain what domain would best be represented by the "?" in the diagram. A) Eukarya because the organisms are all eukaryotic. B) Eukarya because the organisms are all prokaryotic. C) Bacteria because some of the organisms are autotrophs.

If you are eating a hamburger, it is an example of a consumer eating another consumer. a) true b) false