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

By Dr. Jay K. Hackett

Existence technological know-how; dwelling issues desire strength, dwelling issues and their Environment.EARTH technological know-how; Rocks adn Minerals, sluggish adjustments on the earth, quickly adjustments on Earth.PHYSICAL technological know-how; electrical energy, Magnetism.

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Other examples of omnivores include raccoons, pigs, dogs, and chickens. Some insects, such as wasps and flies, will eat both plants and animals. Most people are omnivores, too. People eat from a wide mix of plant and animal food groups. Both omnivores and carnivores are called secondary consumers. Find a Food Chain Take a walk with a partner around the schoolyard. Make a chart to list the plants and animals that you see. Classify Which organisms are producers? Why? Classify Which organisms are consumers?

When you draw conclusions, you interpret observations to answer questions. When you draw conclusions and communicate results, you use this skill. Communicate Share information. Sometimes the results of an experiment lead to new questions. These questions can be used to form a new hypothesis and perform new tests. The process starts all over again. This process of asking and answering questions is called the scientific method. 13 Forming a Hypothesis Most science experiments start with an unanswered question.

Measure The plant eater cuts off 1 cm from the strip and passes it to the meat eater. The plant eater holds onto the larger section. Draw Conclusions Step Infer Why do you think the energy strip gets ripped before it gets passed on? Why is the smallest amount of energy passed to the meat eater? Explore More What might happen if the plant could not make its own food energy? Design a test to find out. f. Follow a set of written instructions for a scientific investigation. 37 EXPLORE What is a food chain?

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