Matter Practice Test 23/24

What best explains the result of a substances of a chemical reaction?

• A new substance is produced

• The same substance is produced

• More energy is produced in the substance

• The substances can be seperated again

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which best supports the Law of Conservation of Mass?

• Atoms can be rearranged to keep the same mass.

• Atoms can be destroyed to make a new substance.

• Atoms can be rearranged to change their mass.

Tags

NGSS.MS-PS1-5

Which best explains how the chemical reaction shown below follows the loaw of conservation of mass?

2H₂ + O_{2 -------->} 2H₂O

• Hydrogen and oxygen molecules combine to form water.

• Hydrogen and Oxygen are held together by strong chemical bonds.

• There are hydrogen and oxygen atoms on both sides of the equation

• The same number of hydrogen and oxygen atoms are on both sides of the equation.

Tags

NGSS.MS-PS1-5

According to the Law of Conservation of Matter, how many atoms of hydrogen are involved in this reaction?

2H₂O₂ --------> 2H₂O + O₂

• 1

• 2

• 4

• 8

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-1

How many oxygen atoms are here?

2(CH₃COOH)

• 1

• 2

• 3

• 4

Tags

NGSS.MS-PS1-1

How many hydrogen atoms are there?

2(CH₃COOH)

• 2

• 4

• 6

• 8

Tags

NGSS.MS-PS1-1

Which products would balance the equation below?

CaCl_{2 +} 2Li

• LiCl + Ca

• Li₂Cl + Ca

• 2LiCl + Ca

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which demonstrates a chemical change?

• ice melting in a warm soda

• molten gold freezing to form a ring

• mixing chemicals and having a color and temperature change

• cutting a sponge in half and having no change in density

Tags

NGSS.MS-PS1-2

What is the best description for iron rusting quickly when exposed to water and salt?

• a change of state

• a chemical reaction

• a physical reaction

• no reaction

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

What happens to molecules during the boiling process?

• the molecules move slower

• the molecules move faster

• the molecules increase in density

• the molecules will condense in the air.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5