Which term describes the substance that forms when two or more types of of atoms join?

Which shows on example of a physical change and then one example of a chemical change?

Which is an example of a physical change?

If a chemical reaction such as the formation of iron oxide contains 4 atoms of iron (Fe) in the product, how many atoms of the iron (Fe) would be in the reactants?

Which is an example of a non-renewable energy resource?

Which problem is most likely to result from the use of nuclear power?

Which is the most likely result of not conserving energy?

Which describes a characteristic of river basins?

One dry summer, a large number of fish suddenly died in a shallow river. Which is the best explanation for the fish kill?

Which of these is most likely to have a harmful effect on the water quality?

How can scientists use the law of superposition?

A scientist finds fossils of sea organisms in a layer of rock on dry land. Which is the best conclusion for the scientist to make?

Which best describes how ice cores provide evidence of Earth's history?

Which of these can reproduce only when inside a host cell?

Which diseases are most likely to be treated with antibiotics?

Epidemics of polio and measles used to be common in the United States. Now they are rare. What is the best explanation for this?

Which is an example of biotechnology?

Which describes a risk of biotechnology?

Which organisms are found at the level with the most available energy?

Which of these organisms are least likely to be producers?

Which is a basis for biological classification?

Which best describes the relationship between genetic variation and adaptation?

Which trait would be most likely to help a species survive in a changing environment?

How is carbon dioxide in the air turned into the carbon in food molecules?

Which system delivers nutrients to the body's cells?

Which is the best example of a mixture?

Which action causes a chemical change?

Which best describes a chemical change?

Which of these best illustrates the law of conservation of mass?

Which is a possible disadvantage of using biomass as fuel?

Which renewable resource comes from the energy of moving water?

Wilson Creek, a National Wild and Scenic River, flows through the Wilson Creek Gorge before it joins the Johns River. Which term best describes Wilson Creek?

What are the most likely effects of ocean upwelling?

Which factors are most characteristic of a healthy body of water?

A scientist finds a fossil of an armored fish. What would help the scientist determine the approximate age of the fossil?

Which process would be best for finding the absolute age of a fossil?

Which is the best explanation for why a fish fossil is found in the rock at the top of a mountain?

What do earthquakes and faults reveal about Earth's history?

Why are people encouraged to get a flu shot?

How is Lyme disease transmitted from an infected mouse to a human?

Amebic dysentery is a disease caused by organisms that live in dirty water. Which is most likely to prevent an epidemic of amebic dysentery?

Which of these describes a pandemic rather than an epidemic?

Which is most likely to be a risk of biotechnology?

Which is an example of an abiotic factor that would strongly affect the population of water lilies in a pond?

Cleaner fish are fish that eat the parasites on larger fish. Which term best describes the relationship between the cleaner fish and the large fish?

How does nitrogen gas in the air become nitrogen in the molecules of living things?

Scientists once placed sea stars, jellyfish and comb jellies in a phylum called Radiata. Now scientists classify these animals in separate phyla. What is the most likely reason?

Which describes a feature of natural selection?

Which process releases energy from food molecules?

How do animals obtain the carbon and nitrogen they need for building materials?

According to the periodic table, the atomic number of oxygen (O) is 8. How many protons does one oxygen atom contain?

Magnesium (Mg) is immediately to the right of sodium (Na) on the periodic table. In what way does a magnesium atom differ from a sodium atom?

Which of these elements has chemical properties most similar to those or carbon (C)?

Which best describes renewable energy resources?

Critics say that electric cars are not as pollution -free as people think. Why?

What is a disadvantage of solar energy?

Where is most of Earth's freshwater located?

Which organism is most likely to be found in an estuary environment

If a body of water has low levels of dissolved oxygen, what can most likely be concluded?

Phosphates help detergents make clothes whiter and clean dishes better. Which is the best reason why phosphates have been removed from detergents?

What are scientists most likely to learn about Earth's history by studying fossils?

How do viruses differ from other disease - causing organisms?

Which kind of organisms are disease - causing yeasts and molds?

Which is the best way to treat athlete's foot?

Which of these is best described as a pandemic?

Studying biotechnology is most likely to be useful for which career?

Suppose most of the rabbits in an area suddenly die from a disease. What would happen to the populations of the rabbits' predators and competitors?

Which of these is not a body of freshwater?

Which is evidence that two species evolved from a common ancestor?

Which is the best evidence that a series of fossils shows the evolution of the whale?

How does adaptation explain the evolutionary history of the horse?

How do plant cells release the energy they need to carry out their life processes?

Which is likely to improve a person's respiratory and cardiovascular systems the most?