What is a period lasting for a few thousand years during which Earth gets warmer?

1. elements an element with properties of both metals and nonmetals 2. metal substances with only one type of atom 3.

What is another term for the calories used to process food?

D) A student suggested that purple flowers are more likely to be visited by bees than white flowers. Use your knowledge of natural selection to suggest how this might affect the number of purple and white flowers in the wild.

What types of carbohydrates are made of chains of alpha and beta glucose?

The atmosphere traps a part of the Sun's heat that is reflected from Earth's surface. This effect, called the greenhouse effect, is primarily responsible for the moderate average temperatures on Earth.

A secondary source might be eliminated by a good researcher because

Which of the following may create ethical issues to be discussed/debated in society? A. Allowing insurance companies to require DNA screens when people are applying for insurance. B.

When sunlight excites electrons in chlorophyll, what happens to them?

Why does water have a high specific heat

What energy source do plants use to produce sugar?