6.5abc review

How many elements are in FeO?

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1

What is the chemical symbol of magnesium?

• 12

• Mg

• Magnesium

• 24.31

Compounds are different than elements. Compounds are made of

• the same type of element.

• different types of elements.

Tags

NGSS.MS-PS1-1

Which of the following shows evidence of a chemical reaction/change?

• Water being boiled and giving off STEAM.

• Sugar DISSOLVING into a liquid.

• Two liquids are mixed, and a solid FORMS.

Tags

NGSS.MS-PS1-2

Which of the following observations tell you that a chemical reaction/change has occured?

• a solid becomes a liquid.

• a substance changes color.

• a solid dissolves into a liquid.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following is shared in all chemical reactions/changes?

• They all produce a precipitate.

• They all show a color change.

• They all release energy.

• They all form new substances.

Tags

NGSS.MS-PS1-2

How are elements different from compounds?

• an element is represented by a chemical formula and a compound is represented by a chemical symbol.

• an element is represented by a chemical symbol and a compound is represented by a chemical formula.

• Both an element and a compound are represented by a chemical symbol.

Which of the following is the most abundant element in Earth's crust?

• Calcium

• Iron

• Oxygen

• Potassium

Compounds are different than elements because compounds are-

• combinations of two or more elements

• not able to be broken down into parts

• made from the same type of atoms

• a pure substance; elements are not

The oceans are primarily composed of which two elements?

• Carbon and hydrogen

• Calcium and Silicon

• Hydrogen and oxygen

• Nitrogen and phosphorus

Tags

NGSS.MS-PS1-1