7th 2.3

For a sedimentary or metamorphic rock to become an igneous rock, it must first ________.

• melt
• weather
• erode
• freeze

Tags

NGSS.MS-ESS2-1

What is the original source of energy stored in biofuels?

• heat energy
• kinetic energy
• light energy
• gravitational energy

Tags

NGSS.HS-LS1-5

NGSS.HS-LS2-5

The law of conservation of matter states that:

• matter is neither created nor destroyed.
• the mass of the products is always greater than the mass of the reactants.
• the mass of the products is always less than the mass of the reactants.
• matter is always converted into an equal amount of energy.

Tags

NGSS.MS-PS1-5

Which of the following is not an example of mechanical weathering?

• A growing plant root splits a rock.
• A bear kicks a rock over a ledge, causing it to break.
• Frozen water in rock cracks breaks the rock apart.
• Iron minerals in rocks turn brown and crumble.

The idea that matter is neither created nor destroyed in chemical reactions is known as the:

• law of conservation of chemicals.
• law of conservation of energy.
• law of conservation of mass.
• second law of thermodynamics.

Tags

NGSS.MS-PS1-5

Which of the following is NOT true about the role tectonic forces play in the rock cycle?

• When plates pull apart, rocks melt, and magma forms igneous rocks.
• When plates crash together, rocks are buried and form metamorphic rocks.
• When plates slide over and under each other, the heat and pressure form igneous rocks.
• When rocks push upward and form mountains, the erosion of the mountains can produce sediment.

Tags

NGSS.MS-ESS2-1

Which of the following is a chemical reaction?

• Water freezes.
• Sugar dissolves in water.
• Salt and pepper are mixed in a dish.
• Iron rusts.

Tags

NGSS.MS-PS1-2

When rocks are broken down into small pieces, like sand and gravel, the pieces are known as ____.

• magma
• sediment
• humus
• debris

A student measured the mass of a candle before and after burning it and found the mass to be lower after burning than before. How can this be best explained?

• Some of the products were gases which escaped and were not measured.
• The masses were the same but the student did not measure accurately.
• Some of the candle wax was converted into light energy.
• The law of conservation of mass does not apply to burning candles.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

A student observed a chemical reaction in which the mass of the products was measured to be less than the mass of the reactants. How can this be explained?

• The mass of the products is always less than the mass of the reactants in a chemical reaction.
• Some of the products must have escaped undetected.
• The law of conservation of mass does not apply to chemical reactions.
• Some of the matter was converted into energy during the reaction.

Tags

NGSS.MS-PS1-5