Which represents a theory?

I observed three stars in the sky. The stars give off light.

Light travels at 300,000 kilometers per second. Stars are balls of hot gases.

How would you define an organism?

Which of the following is NOT a characteristic of all living things? A. adapt to change B. take in oxygen C. made of cells D. respond to stimuli

What would happens if our atmosphere consisted of pure oxygen

The school hockey team travelled 150 km to a tournament by bus. The bus drove at 90 km/h for most of the way, but was delayed by a storm, when its speed was only 30 km/h. If the trip took 3 hours, how far did the bus travel in the storm

When restraining a rat, you should never A. hold the rat so that breathing is unimpeded. B. grasp the end of the tail. C. grasp the base of the tail. D. grasp the neck by placing thumb and forefinger around the lower jaw.

The medical term describing the rupture of intervertebral disk cartilage that allows the contents to protrude through the disk and puts pressure on the spinal nerve roots is:

In considering the reactions between molecules unique to living systems-carbohydrates, lipids (fats), proteins, and nucleic acids-which molecule does not rely on hydrolysis reactions

What list correctly shows carbohydrates in size from smallest to largest?

How do biotic factors affect the environment?

The part of the brain where planning, language and advanced thought occur is:the hippocampus. the amygdala. the cortex. the hypothalamus.