Tim does a study to determine whether or not cigarette smoking decreases speed in track runners

Which is true about scientific method? Group of answer choices Scientists use scientific method informally to test the hypothesis. Scientific method provides a formal, organized way for scientists to perform research.

Which elements are found in high proportion in earth's crust?

Amphibians can breathe through their skin. a. True b. False

What's the definition of animal classification?

Why is igneous rock often used for gravestones, counter tops and building facades?

Why the plants in a space are grown in enclosed containers

What affects about 1% of chronic alcoholics and involves a defect in remembering recent events?

What is the most common method used to count a large species population? A. Estimating B. Sampling C. Guessing D. A pencil and paper

Which of the following is true about DNA mutations? A. Mutations can only occur in the body cells of an organism. B. Mutations can only be caused by environmental factors such as radiation. C. Mutations can spontaneously occur during DNA replication.

How is a door hinge like the joint in your knee