Science TCAP Review - 8th

A student designs an experiment to determine how surface type affects the amount of force needed to roll a ball 20 meters. What is the independent variable?

• the lengths of the surfaces
• the force needed to roll the ball 
• the type of surfaces used 
• the type of ball chosen

• Car Color 
• Car Type
• Distance 
• Timer

A technology company has identified the need for smaller, longer-lasting batteries to use in hybrid vehicles. What would be the first step engineers would take to design and produce an improved battery? 

• test the new battery
• reshape the existing battery
• research current battery technology
• build a prototype battery

Which of these best describes why an artificial arm is considered an assistive engineered product? 

• It is an adaptation of an earlier technology. 
• It helps a person with a disability overcome a handicap. 
• It resembles a human body part.
• It causes a permanent change to an organism. 

• Class Insecta 
• Class Reptilia
• Class Mammalia
• Class Chondrichthyes

Which population would best be adapted to maneuver in a rocky, mountainous region? 

• a population of organisms with hooves 
• a population of organisms with thick fur 
• a population of organisms with gills 
• a population of organisms with moist skin

• There was a decrease in available amount of food. 
• There was an increase in competition. 
• There was a decrease in the predator population. 
• There was an illness among the population.

• F
• G
• H
• J

Ethanol, often produced from corn, is being added to gasoline in an attempt to reduce the amount of fossil fuel usage. Which is an unintended consequence of ethanol use? 

• cost of corn products increases 
• improvement in gas mileage
• conservation of fossil fuels 
• improved health of environment 

The clear-cutting of forests due to urban development will most likely result in 

• decreased forest biodiversity. 
• increased oxygen production. 
• decreased urban populations. 
• increased organism diversity.