Unit Test

Which of the substances listed in the image are elements?

• I and II, only

• II, III, and IV, only

• III and IV, only

• I. and III, only

Tags

NGSS.MS-PS1-1

The molecule is--

• an atom composed of oxygen and carbon elements

• an element composed of oxygen and carbon atoms

• a compound composed of oxygen and carbon atoms

• a mixture composed of oxygen and carbon compounds

Tags

NGSS.MS-PS1-1

Which of the following best describes an element?

• Elements are chemicals that are pure substances held together by chemical bonds.

• Elements are mixtures of atoms and molecules in different combinations.

• Elements are chemicals that are pure substances represented by symbols that have at least one capital letter.

• Elements are chemicals that are formed when a temperature change happens or a precipitate forms.

Vinegar is added to milk. Clumps of white solid are formed that can be separated from the remaining clear liquid. There is no noticeable temperature change. The evidence for chemical change is the---

• odor of the substance

• separation of two substances

• formation of a solid (precipitate)

• constant temperature of the substances

Tags

NGSS.MS-PS1-2

Select the subatomic particle that has a mass of 1 AMU.

Tags

NGSS.MS-PS1-1

Which of the following is an example of a chemical change?

• Dissolving sugar

• crushing a can

• frying an egg

• melting gold

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Vibrations that travel through Earth carrying the energy released during an earthquake is called a(n)

• Seismic Wave

• Radio Wave

• Aftershock

• Vibration

Tags

NGSS.MS-ESS3-2

Part of the mantle that is plastic-like or bends

• Lithosphere

• Asthenosphere

• Lower Mantle

The name of the single landmass that broke apart over 200 million years ago and gave rise to today’s continents

• Antarctica

• Africa

• Pangaea

• Panera

Tags

NGSS.MS-ESS1-4

The mass of a ring is 4.85 grams. Check all the equivalent measures.

• 0.485 dag

• 485 dg

• 0.485 cg

• 4,850 mg

• 0.485 hg