Grade 9 Science Review

A step-by-step sequence of organisms showing how organisms feed on each other (pictured above) is referred to as:

• an ecosystem

• a food chain

• a population

• an ecological pyramid

The original source of almost all energy for ecosystems is:

• detritus

• autotrophs

• producers

• the sun

What does biotic mean?

• Living

• Non-living

An increase in the concentration of a chemical in an organism over time (pictured above) is called:

• Bioaccumulation

• Biomagnification

• Biosis

• Biojumanji

The process by which plants use sunlight to create foods from carbon dioxide and water is called:

• Cellular respiration

• Photosynthesis

• Onomatopoeia

• Water cycle

The process by which energy is used and carbon dioxide/water is released when organisms breathe in oxygen and eat food is called:

• Photosynthesis

• Cellular respiration

• Onomatopoeia

• Water cycle

What does the picture show?

• Cellular respiration

• Photosynthesis

• The water cycle

• The carbon cycle

What is the producer in the food web above

• Mouse

• Snake

• Lizard

• Grass

Based on the food web, the snake is a:

• Herbivore

• Omnivore

• Carnivore

• Foodie

Which of the following are the result of human activities that have caused biodiversity to decrease?

• Habitat change

• Overexploitation

• Pollution

• Invasive Species

• All of the options