Chemistry
Which side of the PTE would you find the elements that are metals?
Left side
Which illness could most likely be treated with antibiotics?
A influenza
B common cold
C strep throat
C strep throat
Which is the best evidence for evolution?
B new rock layers containing fossils unlike existing organisms
C old rock layers containing fossils unlike existing organisms
C old rock layers containing fossils unlike existing organisms
Which best explains why all of the Earth’s freshwater is not available for human use?
B Most of Earth’s freshwater is underground.
C Most of Earth’s freshwater is still in the water cycle.
D Most of Earth’s freshwater is frozen water.
D Most of Earth’s freshwater is frozen water.
What happens to most of the energy as it moves throughout a food web?
A It is changed into light energy.
B It is changed into heat energy.
B It is changed into heat energy.
How is the Law of Conservation of Matter best represented in a chemical reaction?
A The mass of the reactants is greater than the mass of the products.
B The mass of the reactants is equivalent to the mass of the products.
B The mass of the reactants is equivalent to the mass of the products.
What is the difference between an epidemic and a pandemic?
Epidemic - affects a specific region
Pandemic - global, worldwide, affecting many different countries
A scientist finds the bones of a dinosaur. What could help the scientist determine the approximate age of the dinosaur bones?
B the weather conditions in the area of the bones
C the kinds of trees living in the area of the bones
D the index fossils in the area of the bones
D the index fossils in the area of the bones
The water cycle is the reason why water on Earth remain ________________.
The same / Constant.
Which best determines the number of wolves that can live in an area?
B the number of birds that live in the area
C the number of trees in the area
D the amount of food available in the area
D the amount of food available in the area
Elements in group 18 are called........
Noble Gases
This pathogens is non-living and contains both RNA and DNA.
Virus
Which is the most accurate method scientists use to predict the age of Earth?
A relative dating of rock layers
B radioactive dating of rocks
C comparing the ages of different fossils
B radioactive dating of rocks
How can upwellings improve fishing for ocean fishermen?
A They cause the ocean water to get warmer.
B They cause ocean currents to remain calm.
C They bring nutrients from the cold, deep ocean waters.
C They bring nutrients from the cold, deep ocean waters.
Which best represents the flow of energy within an aquatic ecosystem?
A algae → insects → fish → turtle → sunlight
B sunlight → insects → algae → fish → turtle
C sunlight → algae → insects → fish → turtle
C sunlight → algae → insects → fish → turtle
Which chemical equation best represents the Law of Conservation of Mass?
A H + O → H2O
B H2 + O2 → H2O
C 2H2 + O2 → 2H2O
D H2 + O2 → 2H2O2
C 2H2 + O2 → 2H2O
Why do doctors suggest that people get a flu vaccine each year?
A Viruses replicate more rapidly over time.
B Viruses can mutate from year to year.
C Vaccines are absorbed by the body after a year.
B Viruses can mutate from year to year.
Which is the best reason for scientists to study ice cores obtained from Earth’s ice caps?
B to study the quality of water stored in glaciers
C to determine the rate of melting in polar regions
D to study past climates by analyzing trapped gases and particles
D to study past climates by analyzing trapped gases and particles
If a lake has excess levels of phosphates and nitrates in its water, what will most likely result?
B The turbidity levels of the lake will decrease.
C The dissolved-oxygen levels in the lake will increase.
D The growth of algae in the lake will increase.
D The growth of algae in the lake will increase.
Why is protein an important part of a healthy diet?
A It is needed to change glucose to energy.
B It is needed to store nutrients.
C It is needed to repair tissue.
C It is needed to repair tissue.
Which best describes the sequence of the elements in Period 5 of the periodic table?
A highly reactive gases, relatively nonreactive metals, metalloids, very nonreactive gases, nonreactive nonmetals
B highly reactive metals, relatively nonreactive metals, metalloids, reactive nonmetals, nonreactive gases
B highly reactive metals, relatively nonreactive metals, metalloids, reactive nonmetals, nonreactive gases
How has biotechnology helped to improve the agricultural industry?
A by developing irrigation systems that cover a large land area
B by creating some crops that resist certain insects
B by creating some crops that resist certain insects
Which is the most accurate way of determining the age of a fossil?
A radioactive dating
B relative dating
C dating index fossils
A radioactive dating
Which characteristic of water quality provides the most information regarding the health of a water system?
A clarity
B concentration of heavy metals
C presence of indicator species
C presence of indicator species
Which food provides the most energy for the body in the shortest amount of time?
A potato
B meat
C fruit
C fruit