Why did improvements in agriculture lead to the growth of cities?

1. If you have 25% radioactive parent atoms in a mineral crystal, and 75% daughter atoms, how many half-lives have passed?

Which two oceans are covered with large expanses of sea ice? A) Arctic and Indian Oceans B) Arctic and Antarctic Oceans C) Atlantic and Pacific Oceans D) Atlantic and Antarctic Oceans

Which organism would least likely be selectively bred A) Dandelions B) Nantes Carrots C) Belgian Blue Cattle D) Hypoallergenic Cats

The nuclear product of radioactive decay is called the

What is frequency a measure of?

The smallest unit of an element is a blank

How many sodium atoms will create an ionic bond with sulfur?

Rank the elements from smallest to largest electronegativity negativity (smallest at top) 1. N 2. P 3. As 4. Sb

A bicyclist pedaling up a Hill. What type of energy potential or kinetic?

What improvements have been made in modern farming? Select all that apply. 1. machines can do more work over less time 2. better seeds sprout and grow much more quickly 3. trains can transport food over long distances faster 4.