Grade 5 1st term con 1.3 L2

What can cause changes in food webs within an ecosystem?

• Only natural disasters
• Changes in temperature and water levels
• The introduction of new species only
• Human activities exclusively

What is one factor that can lead to changes in food webs?

• The presence of humans only
• The color of the water
• The amount of sunlight
• The size of the organisms

How does climate change affect the population of a species?

• It only affects land species
• It can lead to increases or decreases depending on conditions
• It has no effect on the population
• It always increases the population

What happens to organisms when a species population decreases?

• They stop interacting with other species
• They become more abundant
• They either die or migrate to another area
• They all adapt to the new species

In an ecosystem, how do species depend on each other?

• They only depend on the climate
• They do not interact at all
• They rely on each other for survival
• They compete for resources only

What is a primary food source for many sea birds?

• Insects
• Small fish
• Plankton
• Algae

What role do microorganisms play in the marine food web?

• They are predators
• They are consumers
• They are producers
• They have no role

What will happen to microorganisms if the climate causes water to warm?

• They will adapt to the warm water
• They will become extinct
• They will move to cooler areas
• They will thrive in warmer water

How does the movement of microorganisms affect sea birds?

• It causes sea birds to migrate to land
• It increases the food supply for sea birds
• It can lead to a lack of food for sea birds
• It has no effect on sea birds

What is a consequence of a decrease in small fish populations?

• No change in the ecosystem
• A decrease in sea bird populations
• An increase in sea bird populations
• An increase in microorganism populations