Trimester 2 Second Chance

Matter may be a gas, solid, or liquid. It can change from one state to another. Which change most often causes matter to change state?

• change in mass

• change in color

• change in volume

• change in temperature

Manny's teacher created a mixture of sand, iron fillings, glass beads, and pennies. Manny was asked to describe the steps that should be taken to separate the parts of the mixture?

• Use a magnet to remove the iron filings, use a sieve to remove the pennies and glass beads from the sand, separate the pennies by hand.

• Separate the pennies from the glass beads by hand, use a sieve to separate the sand and iron fillings.

• Remove the iron filings and pennies with a magnet, use a coffee filter to remove the sand from the beads.

• Use a coffee filter to remove the iron filings from the sand, use a sieve to remove the pennies from the beads.

Ernesto and Amanda fill two cups with water. They use hot water in one cupe and cold water in the other cup. Next, they will stirr a spoon of salt in each cup. What will mostl likely happen to the salt in the cups?

• The salt will not dissolve in either cup.

• The salt will dissolve more slowly in the hot water.

• The salt will dissolve more slowly in the cold water.

• The salt will dissolve at the same speed in both cups.

Jo observed some changes and made a table of chemical changes and physical changes.

Which change did Jo put in the wrong column?

• sharpening a pencil

• baking a loaf of bread

• pouring milk into a glass

• crumpling aluminum foil into a ball

Heat energy is transferred from one object to another due to a difference in temperature. Heat energy may be transferred through direct contact or through space but always moves from an object of greater to lesser temperature. Which of the following is the best example of heat being transferred from one object to another.

• stretching a rubber band over a pile of papers

• rubbing two sticks together to start a fire

• jumping rope with two friends

• solar panels providing electricity to a factory

Gayle was excited to wake up to a few inches of snow. It was just enough to build a snowman. She and her sisters quickly put on their mitts and ran outside to begin building their snowman. Later that morning the snowman began to melt. What most likely caused the snowman to melt?

• electrical energy

• sound energy

• mechanical energy

• heat energy