Exploring Ecosystems and Photosynthesis

What is the primary purpose of photosynthesis in plants?

• To produce oxygen for animals

• To convert sunlight into chemical energy

• To absorb carbon dioxide from the atmosphere

• To provide shade for the soil

In an experiment, which of the following is considered an independent variable?

• The growth rate of a plant

• The amount of sunlight a plant receives

• The color of the plant leaves

• The height of the plant

Which of the following best describes the conservation of matter?

• Matter can be created and destroyed

• Matter is always in the form of a solid

• Matter cannot be created or destroyed, only changed in form

• Matter is only found in living organisms

What is mutualism?

• A relationship where one organism benefits and the other is harmed

• A relationship where both organisms benefit

• A relationship where neither organism benefits

• A relationship where one organism benefits and the other is unaffected

Which of the following is an example of commensalism?

• A bee pollinating a flower

• A bird eating insects off a buffalo

• A barnacle attaching to a whale

• A lion hunting a zebra

Which of the following is a biotic factor in an ecosystem?

• Temperature

• Water

• Soil

• Plants

What is a qualitative observation?

• An observation that involves numbers and measurements

• An observation that involves descriptions and characteristics

• An observation that involves calculations

• An observation that involves predictions

Which of the following is a quantitative observation?

• The leaves of the plant are green

• The plant is tall

• The plant has 15 leaves

• The plant is healthy