S8P1

1. A model of a beryllium atom is shown above. (S8P1.e) What types of particles are found in the cloud surrounding the atom’s nucleus?

• Positively charged particles and negatively charged particles

• Negatively charged particles only

• Neutral particles and positively charged particles

• Positively charged particles only

Tags

NGSS.MS-PS1-1

A student is studying the ways different elements are similar to one another. Diagrams of atoms from four different elements are shown below. (S8P1.e)

Which two atoms of elements are in the same group in the periodic table?

• Atom 1 and Atom 2

• Atom 1 and Atom 4

• Atom 2 and Atom 3

• Atom 3 and Atom 4

Tags

NGSS.MS-PS1-1

In which diagram is a chemical change occurring? (S8P1.d)

• Diagram 1

• Diagram 2

• Diagram 3

• Diagram 4

Tags

NGSS.MS-PS1-2

Moisture that collects on the outside of a cold glass results from the process of (S8P1.b)

• Evaporation

• Condensation

• Sublimation

• Vaporization

Tags

NGSS.MS-PS1-4

A solution in a dish contains 3.0 grams of salt dissolved in 100 grams of water. If 50 grams of the water evaporate, the solution is (S8P1.a)

• a compound

• a mixture

• an element

• a solid

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

A student determines the density, solubility, and boiling point of two liquids, Liquid 1 and Liquid 2. Then he stirs the two liquids together and heats them. After stirring and heating the liquids, two different liquids form, Liquid 3 and Liquid 4. Then the student determines the density, solubility, and boiling point of Liquids 3 and 4. He concludes that a chemical reaction occurred. Here are his results:

How does the student know that a chemical reaction has occurred? (S8P1.f)

• The student knows that a chemical reaction has occurred because Liquid 3 has different properties than Liquid 4.

• The student knows that a chemical reaction has occurred because Liquid 1 has different properties than Liquid 2.

• The student knows that a chemical reaction has occurred because Liquids 3 and 4 have different properties than Liquids 1 and 2.

• The student knows that a chemical reaction has occurred because a chemical reaction always occurs when 2 liquids are mixed together.

Tags

NGSS.MS-PS1-2

Tom places four objects in a tank of water. He makes the following observations: (S8P1.c)

· A cork floats.

· A rock sinks.

· A soda can floats.

· A piece of chalk sinks.

Which statement is correct based on Tom's observation?

• The rock and the chalk have a density greater than water.

• The rock and the chalk have a density less than water.

• The cork and the can of soda have a density equal to water.

• The cork and the can of soda have a density greater than water.

The diagrams above represent three phases of matter, Labeled A, B, and C.

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-4

A difference between physical change and chemical change is that (S8P1.d)

• chemical change involves energy while physical change does not

• physical change involves energy while chemical changes do not

• different kinds of molecules are present after a physical change but not after a chemical change

• different kinds of molecules are present after a chemical change but not after a physical change

Tags

NGSS.MS-PS1-2

11. Students poured equal amounts of different liquids to see how the liquids became layered. The denser liquids layered at the bottom. The lighter liquids layered at the top. Which tool should the students use in this experiment? (S8P1.c)

• a balance scale

• thermometer

• a magnet

• a graduated cylinder