Accl 2 Review

Sarah is walking around her carpeted bedroom. She notices that when she touches her doorknob to leave, that she feels an electric shock. Which of the following forces is responsible for her observation?

• Friction between her socks and the floor

• Gravity between the doorknob and her hand

• Magnetic force between the doorknob and the floor

• Noncontact forces between the carpet and the doorknob

Your teacher hands you a jar filled with sand, iron filings, pebbles, and salt. Your assignment is to design an experiment in order to remove the iron filings from the jar. What would be the BEST procedure to follow?

• Add water to dissolve the salt, then pour out the contents and separate them by hand

• Use tongs to pull out the large pieces, then fill the jar with water to dissolve the sand and salt

• Add water to the jar to dissolve the soluble sand, pebbles and salt, leaving you with the iron filings

• Use a bar magnet to remove the iron filings, leaving you with the nonmagnetic sand, pebbles, and salt

Ms. O’Leary is attempting to move a box of textbooks to the other side of her classroom by pushing it. If she knows that the force of friction is 15 N, what would she need to do to move the books?

• Push the box with more than 15 N of force

• Push the box with exactly 15 N of force

• Place more books on top of the box

• Place a rug underneath the box

If you hold a glass of iced tea in your hand on a hot summer’s day, which of the following will take place?

• The temperature of your tea will decrease

• Cold will travel from the glass to your hand

• Heat will travel from your hand to the glass

• The temperature of your hand will increase

Brenda takes a sip from her coffee and decides to place an ice cube into her cup to cool it down. What BEST describes what happens next?

• Heat moves from the coffee to the ice

• Heat moves from the air to the coffee

• Thermal energy is destroyed by the ice

• Cold from the ice evaporates into the air

Lin places a warm soda into the freezer for 30 minutes so that it will be cold enough for her to drink. What happened to the soda when it was placed into the freezer?

• . Heat moved from the metal into the soda can

• Heat travelled from the soda to the freezer

• Cold travelled from the freezer to the soda

• Cold moved from the metal into the air

A great deal of chemical energy can be stored in gasoline, which makes it useful as fuel for cars. When a car burns gasoline, what happens to this energy?

• The gasoline gets destroyed in order to make the engine run

• The gasoline is changed into kinetic, sound and mechanical energy

• Some of it is transformed into kinetic and some gasoline is destroyed

• Some of it is transformed into kinetic and some into potential energy

What type of radiation has a larger

wavelength than those found in the visible light spectrum?

• Ultraviolet Light

• Infrared Light

• Gamma Ray

• X Ray

Large doses of ultraviolet light can cause serious health issues such as sunburns and skin cancer. Why does ultraviolet light cause damage to our bodies while visible light does not?

• . Ultraviolet light has more energy than visible light

  .

• Visible light has more energy than ultraviolet light

• Ultraviolet light is moving at a faster speed

• Visible light is moving at a faster speed

Mary was sitting by a window with a glass of water when she notices a rainbow created as the light goes through the water. Where did the colors in the rainbow come from?

• The glass was curved, making the sunlight appear a different color

• A reflection of a rainbow must have created the image on his paper

• The sunlight was separated into all of the colors of the visible light spectrum

• A chemical reaction took place that resulted in the creation of different colors