8.L.3.3

Significant destruction of a forest habitat will increase which gas in the atmosphere?

• CO₂

• NO₂

• O₂

• N₂

Tags

NGSS.MS-LS1-6

The types of organisms on Earth changed as a result of increased levels of atmospheric oxygen. Which process contributed to this buildup of oxygen in Earth’s atmosphere?

• transformation of light energy into chemical bond energy

• metabolic production of methane

• production of nitrates from inorganic nitrogen

• aerobic breakdown of sugars to release energy

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Which statement BEST explains why only 10% of the energy produced is transferred to the next trophic level?

• The energy is lost as heat to the environment.

• Only a small percentage of energy is needed at higher levels.

• Amount of energy remains the same but in different forms.

• All the energy is used up by primary producers.

Tags

NGSS.MS-LS2-3

Carbon cycles through several Earth subsystems. Which sequence MOST directly leads to the cycling of carbon that can result in the formation of petroleum?

• biosphere to lithosphere

• atmosphere to lithosphere

• hydrosphere to atmosphere

• biosphere to atmosphere

Tags

NGSS.MS-LS2-3

When moist air comes in contact with a cold surface in the winter, one result can be frost. What is the process that occurs when water vapor in the air turns to frost?

• deposition

• sublimation

• evaporation

• condensation

Tags

NGSS.MS-ESS2-4

Which organisms contribute MOST to the decomposition of dead organisms?

• bacteria

• snakes

• viruses

• insects

Some bacteria, fungi, and insects can decompose other organisms. Which BEST describes the role of insects in the decomposition process?

• Insects help break down organic material.

• Insects are the final step in the nutrient cycle.

• Insects provide the nitrogen needed for producers.

• Insects consume fungi and bacteria to produce carbon.

A dung beetle is an insect that gathers waste from animals, rolls it into a compact ball, lays eggs in it, and buries it in the soil. This gives the eggs a warm, safe place to hatch and provides a food source for the developing larvae. Which impact does the dung beetle MOST likely have on its ecosystem?

• It helps return nutrients to the soil.

• It makes animal waste harder to degrade.

• It causes an unhealthy accumulation of animal waste.

• It depletes nutrients from the soil to benefit its young.

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

How does the energy in each trophic level of an energy pyramid compare to the energy in the preceding level?

• It has about 10% of the energy from the level below it.

• It has about 5% of the energy from the level below it.

• It has about 15% of the energy from the level below it.

• It has about 20% of the energy from the level below it.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

When light reflects off certain crystals in the atmosphere, effects called halos appear. Which substance in the atmosphere forms these crystals?

• water

• carbon dioxide

• sulfur dioxide

• oxygen

Tags

NGSS.MS-PS4-2