Download California Science: Grade 4 (Student Edition) by Dr. Jay K. Hackett PDF

By Dr. Jay K. Hackett

Existence technology; residing issues want strength, dwelling issues and their Environment.EARTH technology; Rocks adn Minerals, gradual adjustments in the world, quick adjustments on Earth.PHYSICAL technology; electrical energy, Magnetism.

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Extra resources for California Science: Grade 4 (Student Edition)

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They are also known as primary consumers because they are the first consumers in a food chain. Examples of herbivores include deer, rabbits, grasshoppers, squirrels, and cows. These are just a few examples of animals that eat plants as their main food source. C Many herbivores, such as these antelope, travel together to stay safe from predators. 40 EXPLAIN caterpillar mountain goat Wide Varieties chipmunk elephant Herbivores can be found in most environments on Earth. They live in oceans, forests, deserts, and grasslands.

Herbivores can be big or small. The African elephant, Earth’s largest land animal, is a herbivore that eats mainly grasses. An adult elephant eats between 100 and 200 kilograms (220 and 440 pounds) of plant matter every day! In North America’s grasslands, herbivores can include animals from tiny insects to very large buffaloes. Passing Along Energy Herbivores can be food for other animals. An animal that is hunted by another animal for food is called prey. An animal that hunts another animal for food is called a predator.

For example, earthworms break down plants only. Plantlike organisms called fungi (FUN•jigh) break down rotting wood and other plant parts. Still other decomposers break down what is left of dead animals. Decomposers that consume dead matter are also consumers. Decomposers work together to break down organisms completely. The once-living material may become part of the soil. This material adds nutrients to soil that help plants to grow well. Now the food chain can start all over again! Some insects, like this beetle, are decomposers.

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