Review for Unit 3

Matter that make up the nonliving parts of an ecosystem, such as air and water

• abiotic

• biotic

• composer

• energy storage molecules

Answer explanation

The correct answer is 'abiotic' because it refers to the nonliving components of an ecosystem, such as air and water, which are essential for supporting life.

Tags

NGSS.MS-LS2-3

A closed ecosystem made by humans

• Earth

• biodome

• biopic

• mitosis

Answer explanation

A biodome is a closed ecosystem created by humans, designed to replicate natural environments. Unlike Earth, which is a planet, or biopic and mitosis, which are unrelated concepts, biodomes specifically refer to human-made ecosystems.

Tags

NGSS.MS-LS2-3

An organism that gets energy storage molecules by breaking down dead matter

• primary consumer

• secondary consumer

• producer

• decomposer

Answer explanation

A decomposer breaks down dead matter, recycling nutrients back into the ecosystem. Unlike consumers and producers, decomposers play a crucial role in energy storage by converting organic material into energy storage molecules.

Matter that makes up the living and dead organisms in an ecosystem.

• abiotic

• mitosis

• biotic

• photosynthesis

Answer explanation

The term 'biotic' refers to all living components in an ecosystem, including both living organisms and the remains of dead organisms. In contrast, 'abiotic' refers to non-living factors, making 'biotic' the correct choice.

Tags

NGSS.MS-LS2-3

The part of the cell where photosynthesis happens

• mitochondria

• nucleus

• ribosome

• chloroplast

Answer explanation

Photosynthesis occurs in the chloroplasts, which contain chlorophyll to capture light energy. Mitochondria are for respiration, the nucleus houses DNA, and ribosomes synthesize proteins, making chloroplast the correct answer.

Tags

NGSS.MS-LS1-6

The chemical reaction between oxygen and glucose that releases energy.

• photosynthesis

• carbonation

• oxygenation

• cellular respiration

Answer explanation

The chemical reaction that occurs when oxygen and glucose combine to release energy is called cellular respiration. This process is essential for producing ATP, the energy currency of cells.

Tags

NGSS.HS-LS1-7

A molecule made of carbon and oxygen atoms

• carbon dioxide

• energy storage molecules

• oxygen

• carbon

Answer explanation

The question asks for a molecule made of carbon and oxygen atoms. Carbon dioxide (CO2) is a well-known molecule consisting of one carbon atom and two oxygen atoms, making it the correct answer. The other options do not fit this description.

Tags

NGSS.MS-PS1-1

An organism that needs to eat in order to get energy storage molecules.

• producer

• consumer

• decomposer

• dead matter

Answer explanation

A consumer is an organism that must eat other organisms to obtain energy and nutrients. In contrast, producers create their own energy through photosynthesis, and decomposers break down dead matter.

A molecule that organisms can use to release the energy they need to survive.

• carbon

• oxygen

• glucose

• energy storage molecule

Answer explanation

The correct answer is 'energy storage molecule' because it refers to molecules like glucose that organisms use to store and release energy necessary for survival.

Tags

NGSS.MS-LS1-7

The part of the cell where cellular respiration happens.

• mitochondrion

• energy storage molecules

• cells

• chloroplasts

Answer explanation

Cellular respiration occurs in the mitochondrion, which is known as the powerhouse of the cell. It converts nutrients into energy, unlike chloroplasts, which are involved in photosynthesis.