Physical Science Review

Which process is represented by the following description: “sugar is added to water and a sweet liquid results after stirring”?

• melting

• dissolving

• evaporation

• oxidation

The figure below shows how the word “ambulance” is painted on the front of some vehicles so that it reads correctly in the rearview mirror that is attached to the windshield of a car driving in front of the ambulance.

• turns the word upside down

• reverses the left and the right sides of objects

• rotates the objects by 90 degrees

• makes the objects appear farther away

The weight of a person on Earth is 6 times his or her weight on the Moon. What type of force is responsible for a person’s weight?

• inertial

• electromagnetic

• gravitational

• mechanical

Tags

NGSS.HS-PS2-4

A large number of iron nails were kept in containers in a humid room. Some of the containers were open, and some were airtight. Sixty percent of the nails kept in open containers developed rust. Which of the following would be MOST important to know in order to draw a conclusion about whether the humidity might have contributed to the rusting?

• the percentage of nails weakened by the rusting

• the precise number of nails kept in airtight containers

• the percentage of nails in airtight containers that also developed rust

• the precise number of nails kept in the open containers

Which of the following is an example of a situation in which exothermic chemical reactions occur?

• Ice cubes melt into water.

• Boiling pots of water turn to steam.

• Fireworks explode during a holiday.

• Pieces of KCl dissolve in water.

Tags

NGSS.HS-PS1-4

Why did Dimitri Mendeleev use atomic masses instead of atomic numbers to organize his first periodic table in 1869?

• Scientists did not know about atomic number in 1869.

• Atomic mass works better than atomic number.

• The elements will not be in the proper order if atomic number is used.

• Atomic number cannot be measured.

Mr. Jacobs gives four groups of students an ice cube that they are to keep from melting as best as they can. An ice cube melts the LEAST over a period of one hour when it is

• A tightly wrapped in aluminum foil

• B in a tin can

• C in a glass jar

• D in a glass jar and the jar is completely covered in aluminum foil

Tags

NGSS.HS-PS3-4

Pauline needs to measure the sliding friction of a brick. How should she go about doing this?

• A attach the brick to a string and then to a spring scale and read the force needed to quickly lift the brick off the ground

• B drag the brick by a string attached to a spring scale so that it gradually speeds up

• C drag the brick by a string attached to a spring scale along the surface of a table at a constant speed and read the force

• D hang the brick from a string attached to a spring scale and read the force

By what process does a lens focus light?

• A reflection

• B refraction

• C congregation

• D dispersion

Which procedure is unsafe when heating a liquid in a test tube?

• A heating slowly

• B adding the liquid to the test tube before turning on the flame

• C using a low-energy flame

• D looking down the test tube to check for boiling