Why do plants not have a exsited before cyanobacteria started producing oxygen?

Which of the following is a renewable resource, copper, aluminum, peanut oil, or natural gas?

A thin, square metal plate measures 15 cm on each side and has emissivity of 0.80. The plate is heated to a temperature of 605°C. What is the rate at which the plate radiates energy? The Stefan-Boltzmann constant is 5.67 * 10-8 W / (m2 ∙ K4).

What is a bond called that shares electrons between two neutral atoms? A. covalent bond B. ionic bond C. metallic bond D. polar bond

From the top of a tall building, you throw one ball straight up with speed v0 and one ball straight down with speed v0.

How can we show the strength and effects of magnets on one another

Stephen buys a new mop he travels 3 km south and the. 4 km east and then 3km north how far does he need to go to get back. To where he started

The elements with the largest atomic radii are found in the

Students will explain, distinguish the difference between the 4 states of matter

Name one way that a mixture can be separated

The Huka Falls on the Waikato River is one of New Zealand's most visited natural tourist attractions. On average, the river has a flow rate of about 300,000 L/s. At the gorge, the river narrows to 20-m wide and averages 20-m deep.