Ab

Every 100,000 to 200,000 years, the magnetic poles of Earth reverse. Rocks that contain iron provide a record of both normal and reversed magnetic poles. The pattern of normal and reversed magnetic poles as recorded in the rock on either side of the Mid-Atlantic Ridge provide evidence supporting the Theory of Plate Tectonics because -

• the composition of the rock changed every time the plates pushed against each other.

• the symmetric pattern shows where plates are moving away from each other.

• deposits of iron in the rock were only made when the plates stopped moving.

• " the bands of rock showing normal and reversed poles are not all the same width."

Tags

NGSS.MS-ESS2-3

One piece of evidence that supports the Theory of Plate Tectonics is the discovery of what in both South America and Africa?

• The ancient atmosphere in both places was identical.

• The rates of weathering of rock are similar.

• Fossil remains of the same land-dwelling animal.

• Plants on both continents have similar flowers.

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

NGSS.MS-LS4-2

Even before modern observations provided evidence that supports the Theory of Plate Tectonics, people developed theories that the continents were once joined together. Using only maps, they observed that -

• most of the larger land masses are in the Northern Hemisphere.

• continents with the most moderate climates were located near the Equator.

• the shapes of continents appeared to allow them to fit together.

• the oceans have decreased in size throughout the history of Earth.

Which of the following features is likely to form where two tectonic plates push toward each other?

• Ocean shoreline

• Mountain range

• Mid-ocean ridge

• Rift valley

Tags

NGSS.MS-ESS2-1

Identify the products of the chemical equation 3LiOH + H₃PO₄ →

• Li₃PO₄ + 3H₂O

• LiPO₄ + 3H₂O

• Li(PO₄)₃ + 3H₂O

• LiPO₄₃ + 3H₂O

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The reaction of hydrochloric acid (HCl) with ammonia (NH₃) is described by the equation:HCl + NH₃ → NH₄ClA student is titrating 100.0 cm³ of 0.10 M NH₃ with 0.5 M HCl. How much hydrochloric acid must be added to react completely with the ammonia?

• 20.0 cm³

• 500.0 cm³

• 100.0 cm³

• 5.0 cm³

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the atomic number of the element with the symbol 'Ab'?

• A) 1

• B) 2

• C) 3

• D) 4

Which of the following elements is represented by the symbol 'Ab'?

• A) Hydrogen

• B) Helium

• C) Lithium

• D) None of the above

In a hypothetical experiment, element 'Ab' reacts with oxygen to form a compound. What type of bond is most likely formed?

• A) Ionic bond

• B) Covalent bond

• C) Metallic bond

• D) Hydrogen bond

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If 'Ab' is a newly discovered element, which of the following properties would you expect it to have if it is a metal?

• A) High electrical conductivity

• B) Brittle

• C) Low melting point

• D) Poor thermal conductivity