The model shows part of how carbon is cycled.

The green box in the model represents organisms that remove carbon dioxide from the atmosphere to recycle it.

Which BEST describes these organisms?

• producers that carry out photosynthesis to make carbon-rich sugars

• bacteria that combine carbon dioxide with nitrogen to make nutrients

• fungi that break down oxygen and release carbon dioxide in exchange

• consumers that make energy by taking in carbon dioxide when they inhale

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is a group of individual organisms that belong to the same species?

• Community

• Ecosystem

• Biome

• Population

The difference between a habitat and a niche is that a niche is

• The specific functional role of an organism.

• The organism's preferred habitat.

• The kind of place an organism occupies.

• None of the above

Some birds are known as honeyguides because humans often follow them to wild beehives. When the humans take the honey from the hives, the birds are able to feast on the honey and the bees as well.

This type of relationship between the humans and the birds can best be described as

• Mutualism

• Commensalism

• Parasitism

• Herbivory

Tags

NGSS.MS-LS2-2

Select two substances that a green plant must obtain from its environment to carry on photosynthesis.

• glucose

• carbon dioxide

• chlorophyll

• water

• oxygen

Which of the following has had the most negative effect on Earth's ecosystems?

• establishment of air pollution standards

• increase in human population

• recycling glass, plastic, and metals

• use of natural predators to control pest insects

Tags

NGSS.MS-ESS3-4

The images below represent four populations in a food chain.

Which sequence best represents the transfer of energy between these organisms?

• Toads → Predatory insects → Herbivorous insects → Plants

• Predatory insects → Herbivorous insects → Plants → Toads

• Plants → Herbivorous insects → Toads → Predatory insects

• Plants → Herbivorous insects → Predatory insects → Toads

Tags

NGSS.MS-LS2-2

NGSS.MS-LS2-3

Assume that the producers in this ecosystem have 100,000 kcal of stored energy.

About how much of this energy would reach the tertiary consumers in the ecosystem?

• 100 kcal

• 1,000 kcal

• 70,000 kcal

• 73,000 kcal

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

Gabi is modeling a step in the carbon cycle.

Which of the following words belongs in the box?

• fixation

• photosynthesis

• respiration

• transpiration

Tags

NGSS.MS-LS1-6

In the carbon cycle, all animals must consume other organisms because

• they can not absorb enough carbon from water.

• they cannot absorb carbon directly from the air.

• they are in competition with plants for available carbon.

• they require carbon to perform photosynthesis.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4