6. NC 8th Grade Science EOG Review

Which statement best explains how periods on the periodic table are arranged? 

• increasing atomic number from left to right 
• increasing number of neutrons from left to right
• decreasing number of electrons from left to right
• decreasing atomic mass number from left to right 

An ice cube is put into a heated pan. What will most likely happen to the molecules in the ice as the ice is heated?

• the molecules will begin to move slower
• the molecules begin to move faster 
• the molecules will begin to increase in density 
• the molecules will begin to condense in the air 

Which best explains why the total mass of the products would be less than the total weight of the reactants after a chemical reaction? 

• a physical change occurred 
• atoms involved in the reaction lost mass
• precipitates were created in the new solution
• gases were released to the atmosphere 

Which is an example of a renewable energy resource? 

• biomass
• coal
• gas
• oil

Which best determines the health of a lake used as a source of freshwater? 

• its depth and width
• its temp and ph
• its location and depth
• its temp and depth 

A scientists finds bones of a dinosaur. What could help the scientist determine the approximate age of the dinosaur bones? 

• the birds living in the area of the bones 
• the weather conditions in the area of the bones 
• the kinds of trees living in the area of the bones 
• the index fossils in the area of the bones 

Which best describes how ice cores are important to the study of geologic history? 

• they show unconformities, which signal changes in deposition 
• they hold index fossils, which are used to date the different ice cores 
• they contain evidence showing changes in the atmospheric composition 
• they follow the Law of Superposition, which gives reasons for extinctions of species  

Which best determines the number of wolves that can live in an area? 

• the amount of snow in the area each year 
• the number of birds that live in the area 
• the number of trees in the area 
• the amount of food available in the area 

Where is the largest amount of energy found? 

• hawk
• grass
• mouse
• grasshopper

Tigers and household cats are members of the same family; however, they are vastly different. What is the cause of this difference? 

• biochemical makeup 
• behavioral makeup 
• genetics 
• habitat size