Human activities can add which following to the atmosphere?

a. oxygen

b. water vapor

c. heat

d. carbon dioxide

Rough seas with dangerous icebergs describe which of the following locations?

A tide that occurs when the sun, earth, and moon are positioned to form a right triangle in space; high tides are lower than normal, while low tides are higher than normal.

What is the approximate ocean depth at the mid-atlantic ridge and the relief of the ridge?

Which one of the following is a major contributor to pollution? a. riding your bike b. cars driving along a highway c. recycling newspapers d. recycling glass user: what is one of the ways we can conserve? a. use more nonrenewable resources b.

The Serengeti is the world's largest a. desert. b. mountain range. c. savanna. d. lake.

What country is opposite the United States on the earth

What are the main ethnic groups in the United States and their percentage of the population? What languages are spoken in the United States, and what are those percentages?

Submersible used to study the deep oceans

Which planet has an atmosphere that demonstrates the extreme nature of the greenhouse effect? a. mars b. earth c. venus d. mercury

Children who live with their grandparents seem to have higher rates of poverty and other problems in what types of contexts?