7th Grade Fall Semester Exam Review

Which of the following best illustrates an application of Newton’s First Law (also called the Law of Inertia)?

• A. A passenger not wearing a seatbelt is ejected from an automobile during a severe crash.

• B. Dinner plates remain on a table when a slick tablecloth is pulled out from underneath them.

• C. An ice hockey puck continues sliding across the relatively frictionless ice until it comes into contact with a wall or a player’s stick.

• D. All of these are examples of Newton's First Law.

Jack placed a coin on a card on top of a glass. He quickly pushed the card and the coin fell into the cup. Which statement below best explains this result?

• A. Force is equal to mass times acceleration.

• B. A body in motion tends to stay in motion or a body at rest tends to stay at rest unless acted on by an outside force.

• C. Momentum equals mass times velocity.

• D. For every action there is an equal and opposite reaction.

As students walk into science class they notice gloves, goggles, and splash aprons on the lab tables. Students should expect which of the following during today’s lab?

• Students will be mixing chemicals that have the potential to harm human tissue.

• Students will be testing magnetic properties of various substances.

• Students will be determining which variable most affects the speed of an object’s fall.

• Students will be testing how heat is conducted through various metals.

Tags

NGSS.MS-PS1-2

What does this symbol indicate about a chemical?

• It can cause injury to body tissue.

• It catches fire easily.

• It is hazardous to the environment.

• It can be harmful to your lungs.

Which statement concerning lab safety is not correct?

• Wearing safety goggles is unnecessary if eyeglasses are worn.

• Loose clothing and open-toed sandals should not be worn.

• Report all broken and/or malfunctioning equipment to the teacher.

• Always tie back long hair.

What type of heat transfer is responsible for an ice cube melting in your hand?

• Conduction

• Convection

• Radiation

• Dissolution

Tags

NGSS.MS-PS1-4

What type of heat transfer is heating food in a microwave?

• Conduction

• Convection

• Radiation

• Dissolution

During which process of energy exchange does cold air displace warmer air?

• Conduction

• Convection

• Radiation

• Emission

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

During a warm summer day, a car became extremely hot. When a student went to open the car door, he burned his fingers. What TWO methods of heat transfer were responsible for the student burning his fingers?

• radiation

• evaporation

• convection

• electrical current

• conduction

What type of energy transfer is occurring as the winds are moving?

• A. convection

• B. conduction

• C. radiation

• D. force

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6