A source from which organisms generally take elements is called a/an

A. biotic community.

B. food web.

C. exchange pool.

D. reservoir.

Name two ways of protecting your hearing

For each of the following chemical reactions, calculate the mass of the underlined reactant that is required to produce 1.000 g of the underlined product.

The acceleration of an object is the slope of its velocity-time graph. True False

A honey bee flaps its wings 200 times per second. How much time is required for one wingbeat? Give your answer in milliseconds.

What tool allows you to draw parallel horizontal lines on plain paper?

How does an object's motion change as a result of centripetal acceleration? The speed decreases in the same direction. The speed increases in the same direction. The direction changes along with the speed. The direction changes but not the speed.

Choose all the answers that apply. Confirmation bias ___. is the most common type of bias. always proves a hypothesis always disproves a hypothesis does not affect the accuracy of experimental results is caused by other people's ideas and opinions

What of a wave is a measure of the energy it carries

A large volume of air moving across the surface of the earth know as ...

A student rapidly rubs the palms of both hands together, after eating lunch. Which sequence correctly describes the energy transformations that occur? a. chemical mechanical heat b. mechanical heat chemical c. heat mechanical chemical d.