Physical Science - Benchmark

IF you dissolved a lot of salt in some water in a large flat dish and put the dish in bright sunlight on a hot day, what would be left in the dish after a long time?

• dry salt

• water with no salt

• the same salty water as before

• nothing

Which method would be MOST effective for separating a mixture of water, sand and iron fillings?

• Filter the iron filings from the water and sand, and the nboil off the water to leave the sand.

• Filter the sand from the water and iron filings, and then boil off the water to leave the iron filings.

• Filter the sand and iron filings from the water, and then use a magnet to separate the iron filings from the sand.

• Filter the sand and iron filings from the water, and then heat the mixture to separate the iron filings from the sand.

Cutting, folding or tearing a piece of a paper would be an example of

• chemical change

• changes in composition

• changes in mass

• physical change

A student combines raisins, peanuts, chocolate chips and pretzels to form a trail mix. How is the student changing the ingredients mixed?

• physically

• chemically

• electronically

• no change at all

Matthew took a piece of paper, cut the edges and folded it until he made a nice, new paper fighter jet airplane, pictures like the one pictured below.

How would you describe the change from a piece of paper to a paper plane?

• physically

• chemically

• electronically

• no change at all

An ice cube tray is filled with water, the tray is placed in a freezer for 12 hours. The water freezes forming ice. The tray is removed from the freezer and left on a counter for 12 hours. What changes as the water becomes ice and then melts back into water?

• the amount of energy in the water

• the amount of water in the ice cube tray

• the number of water molecules

• the mass of the water molecules

A scientist needs to take a picture of the well-ordered arrangements of the atoms and molecules within a substance. Which of the following instruments would be best for the scientist to use?

• a laser light with holograph

• a seismograph

• a microscope

• a stereoscope

What type of change will occur when an ice cube melts and becomes a liquid?

• property change

• chemical change

• physical change

• chemical reaction

How are water, ice, and steam all alike?

• they are the same compound

• they have the same shape

• they look the same

• they feel the same

Which is an example of a liquid turning into a gas?

• a chocolate candy bar melting

• ice cream dipping

• steam turning into ice

• water boiling