6 P 2

Two pieces of copper wire are rolled into a coil to make a bracelet. Which statement describes the copper wire?

• Both copper wires are different because they came from different sources.

• Both copper wires are the same because they were able to bend.

• Both copper wires are made of the same types of atoms.

• Both copper wires are made of different types of atoms.

Tags

NGSS.MS-PS1-1

What change occurs when a liquid evaporates?

• The particles absorb heat and get closer together.

• The particles absorb heat and spread farther apart.

• The particles release heat and get closer together.

• The particles release heat and spread farther apart.

Tags

NGSS.MS-PS1-4

Sam found two pieces of pure silver on two different continents and melted them. Why did the two pieces of pure silver have the same melting point?

• Silver is a metal with high conductivity.

• The melting point of all metals is the same.

• Silver is composed of the same types of atoms.

• The melting point of all natural minerals is the same.

Tags

NGSS.MS-PS1-4

How does a 5-g sample of pure gold compare to a 50-g sample of pure gold?

• They have the same melting point but different masses.

• They have the same volume but different melting points.

• They have the same volume but different boiling points.

• They have the same mass but different boiling points.

Tags

NGSS.MS-PS3-4

What happens to steam during condensation?

• It loses energy and changes to a liquid.

• It loses energy and changes to a gas.

• It gains energy and changes to a liquid.

• gains energy and changes to a gas.

Tags

NGSS.MS-PS1-4

Which best describes the atoms of an element?

• All of the atoms in an element are different.

• All of the atoms in an element are the same.

• The atoms in an element are at least two types joined together.

• About one hundred different types of atoms make up an element.

Tags

NGSS.MS-PS1-1

Which best describes the center of an atom?

• atomic mass

• electrons

• protons

• nucleus

The boiling point of water is 100°C (212°F). As the water begins to absorb heat, what begins to happen to the atoms in the water?

• The atoms begin to move more slowly.

• The atoms move more slowly and soon stop.

• The atoms speed up until they move very quickly.

• The atoms move more slowly and then speed up again.

Tags

NGSS.MS-PS1-4

During a class demonstration, the teacher held up two identical blown-up balloons and bounced them on his desk. They bounced to the same height. After holding one balloon above a lighted candle for one minute, he repeated the procedure. Which is the most likely outcome?

• The balloons bounced to the same height again.

• The unheated balloon bounced higher.

• The heated balloon bounced higher.

• The heated balloon did not bounce.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-5

Which would be directly affected by increasing an object’s volume while keeping its mass constant?

• density

• boiling point

• temperature

• melting point