What organisms apart from algae would have needed to be present to remove carbon dioxide from the early atmosphere?

What is the closeness of measured value to an accepted value?

Radio waves are diffracted by large objects such as buildings, whereas light is not noticeably diffracted. Why is this? A. The wavelength of light is much greater than the wavelength of radio waves. B.

A 7.12 μC charge is moving at the speed of light in a magnetic field of 4.02 mT. What is the force on the charge?

In some places, hot water from underground can shoot up into the air through a hole in the ground. When this happens, the ground surrounding the water increases in temperature.

Walking converts what type of energy into mechanical energy?

Which of the following are the top two job expectations of people who career plan? Select all that apply. A. Hours B. benefits C. type of work D. coworkers E. security

Define the term volt.

A baseball player was hit by a baseball in the left eye and complains of double vision. What should you do? A. Restrict spinal movement B. Assess pupillary response C. Perform a detailed exam D. Apply ice to orbit

An approaching storm is moving at 15 km an hour what do you need to know to determine its velocity

How did astronomers precisely determine the length of an Astronomical Unit in the 1960s?