Population Dynamics
Grade 7 · Science · Ecology · New Mexico, USA
Lesson Summary
Learn what causes populations to grow, shrink, or stay stable over time.
Explanation
A population's size changes based on birth rates, death rates, immigration (moving in), and emigration (moving out). When resources like food, water, and space are plentiful, populations tend to grow. As the population gets larger, competition increases and growth slows. The maximum population an environment can support is called the carrying capacity. Factors like predation, disease, and natural disasters also affect population size.
Practice Questions
Q1: What is carrying capacity?
Answer: Carrying capacity is the maximum number of individuals of a species that an environment can support with its available resources over time.
Q2: Name two factors that could cause a population to decrease.
Answer: Increased predation and disease are two factors that could reduce a population (others include food shortage, habitat loss, and natural disasters).
Q3: If a forest provides enough food for 500 deer but 700 deer are living there, what will likely happen?
Answer: Competition for food will increase. Some deer will not get enough food, leading to increased death rates or emigration until the population drops closer to the carrying capacity of 500.
People Also Ask
What is Population Dynamics in Grade 7 Science?+
Population Dynamics is a lesson in the Ecology chapter of Grade 7 Science. It is part of the New Mexico, USA school curriculum and covers key concepts that students need to understand at this level.
What grade level covers Population Dynamics?+
Population Dynamics is taught in Grade 7 as part of the Science curriculum in New Mexico, USA.
How can I help my child with Ecology in Science?+
Start with the lesson summary and explanation on this page. Practice the questions provided, then use TutorTom for personalized, step-by-step help with Ecology topics.