SNC 1W1 Unit 2 Lesson 2

Radiant energy from the Sun

Almost all energy for life originates from which source?

Photosynthesis

What process converts sunlight into chemical energy stored as glucose?

Carbon dioxide + water + energy → glucose + oxygen

Give the full equation for photosynthesis.

Cellular respiration

What process releases chemical energy from sugar using oxygen?

Glucose + oxygen → carbon dioxide + water + energy (ATP)

Give the full equation for cellular respiration.

To break down glucose gradually to release usable ATP energy

Why do both plants and animals need cellular respiration?

Niche

The role of a species in its ecosystem, including what it eats, what eats it, and its behaviour.

Producer

What is an organism that makes its own food chemically?

Herbivore

Consumer that eats only plants or producers.

Carnivore

Consumer that eats only animals.

Omnivore

Consumer that eats both plants and animals.

Scavenger

Consumer that feeds on the remains of dead organisms.

Trophic Level

The position of an organism in a food chain.

Food Chain

A diagram showing feeding relationships in one sequence.

Food Web

A network of interconnected food chains.

Pyramid of Energy

Shows energy transfer between trophic levels; only ~10% passes to next level.

Pyramid of Numbers

Shows number of organisms at each trophic level.

Pyramid of Biomass

Shows amount of organic matter at each trophic level.

Both

In which processes do plants participate: photosynthesis, cellular respiration, or both?

Cellular respiration only

In which processes do animals participate: photosynthesis, cellular respiration, or both?