7.LS2.1--Passage--Matter and Energy Flow

What process do plants use to capture energy from the sun and make food?

• Photosynthesis

• Cellular respiration

• Combustion

• Decomposition

What is the main form of sugar in which plants store energy?

• Glucose

• Fructose

• Sucrose

• Lactose

What role do decomposers play in the ecosystem?

• They break down dead organisms, returning nutrients to the soil, air, and water.

• They produce oxygen for plants and animals.

• They capture energy from the sun and convert it into food.

• They consume carbon dioxide and release glucose.

Which organelle is responsible for photosynthesis in plants?

• Chloroplast

• Mitochondria

• Nucleus

• Ribosome

Why are humans and animals dependent on plants for carbon?

• Plants convert carbon dioxide into glucose, making carbon available through the food chain.

• Plants produce carbon dioxide directly usable by humans and animals.

• Plants store carbon in a form that can be directly inhaled by humans.

• Plants convert carbon into proteins directly consumable by humans.

What is the Law of Conservation of Matter?

• No new atoms are created; matter is constantly reused.

• Matter can be created and destroyed.

• Energy is created from matter.

• Atoms can be transformed into energy.

How can combustion affect the carbon cycle?

• It releases stored carbon from dead plants or fossil fuels back into the atmosphere.

• It captures carbon dioxide from the atmosphere and stores it in plants.

• It converts carbon into oxygen for animals to breathe.

• It prevents carbon from reentering the living systems.

The main source of energy in an ocean food chain is ....

• carbon dioxide

• ocean currents
• sunlight

• plankton

As energy moves from the producers to consumers,

and then finally to top level consumers in a food

chain, the energy ____________, as it moves further through the food chain.

• increases
• remains constant
• decreases
• oscillates

Phytoplankton's role in an ocean food chain is a__________.

• combustor

• consumer

• producer

• decomposers