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# 8.1: Planning

Difficulty Level: At Grade Created by: CK-12

## Key Idea

• Organisms need specific resources in specific amounts to survive and reproduce.

## Overview

This section continues the topic of resources by distinguishing between the three related but separate topics of resources, niches, and habitats. Through the simulation of a bobcat population students learn about resource requirements and carrying capacity. Students learn that all organisms need habitats that provide resources such as food, water, and space. Throughout the section students are reminded that they also require specific resources in order to survive and they are asked to identify the specific requirements of their own niche.

## Objectives

Students:

\begin{align*}\checkmark\end{align*} explain that all organisms need certain resources in specific amounts to survive and reproduce.

\begin{align*}\checkmark\end{align*} identify the factors that determine the carrying capacity of a specific area.

\begin{align*}\checkmark\end{align*} define the term niche and explain their own niche requirements.

\begin{align*}\checkmark\end{align*} predict the size of a population based on the available resources.

\begin{align*}\checkmark\end{align*} analyze graphs representing a population curve.

\begin{align*}\checkmark\end{align*} evaluate the importance of space for the survival of plants.

## Vocabulary

carrying capacity, habitat, niche, resources, species

## Student Materials

### Activity 7-1: Too Many Bobcats

Per student

• Resource
• Activity Report
• Sandwich-size plastic bag

Per class

• Colored construction paper: red, green, black, yellow, orange, and blue, cut into 20 rectangles of each color (for a class of 30 students)
• Large open area-large enough to scatter 120 paper rectangles

## Teacher Materials

### Activity 7-1: Too Many Bobcats

See Activity 7-1 in the Student Edition

Make sure you have an area available to conduct the activity.

## Enrichment Activities

### Enrichment 7-1: What's in a Niche?

Students learn about the components of a niche by listing things they would need in various habitat types.

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