Which type of property of matter can be observed without changing the composition of the substance?

a) physical properties

b) reversible properties

c) chemical properties

d) irreversible properties

In November 2004 the floodgates of Glen canyon Dam opened in attempt to improve the Colorado river habitat. The release topped 1161m3/s four times the usual daytime flow.

Which phrase BEST describes the function of the ATP molecule? O Creates energy O Absorbs energy O Stores energy O Increases energy

How were life forms affected by the rise in atmospheric oxygen levels that began 2.2 billion years ago?

Two steel balls that are the same mass and size are rolled with the same force across different level surfaces. The ball rolling across carpet will come to a stop faster than the one rolling across concrete because of A) air resistance. B) friction.

Ribosome The type of organic molecule that is being synthesized is 1. DNA starch protein fat

Which of the below is TRUE regarding desertification? a. It is likely to happen in any type of climate b. It produces rich desert ecosystems c. It is not usually impacted by droughts or climate change d.

What is considered a pre existing medical condition?

Humans do not eat the algae directly from the ocean, so how can we still be affected by it?

In an effort to control the ongoing cholera epidemic affecting Haiti, health officials are considering the use of cholera vaccines. One difficulty they are facing is the limited vaccine supply.

which term refers to the structure that forms the surface of a cell separeting its conctents from the outside world