Which of these is a mixture?

a. oxygen

b. air

c. carbon dioxide

d. carbon

The diagram shows Niels Bohr's model of an atom. A small green circle labeled Proton is surrounded by 4 concentric circles.

Inside a volcano how do the slanted layers of hardened lava get there

What experimental evidence did thomson use to support his hypothesis that atoms of all elements are made up of even smaller, charged particles?

Base your answers to questions 66 through 68 on the information below. In the early 1800s, John Dalton proposed an atomic theory that was based on experimental observations made by several scientists.

Which natural occurrence is shown? Check all that apply. 1. Drought 2. Flooding 3. Earthquake 4. Long term environmental change 5. Short term environmental change

Two objects, one heavy and one light, travel at one of two speeds. Which will have the most inertia?

Which statements correctly describe water boiling in a pot? Air bubbles from the atmosphere are being absorbed. The water's internal kinetic energy is increasing. The water is gaining internal potential energy. The water's temperature is increasing.

Biofuel is any fuel that is produced from living or once living matter in a short period of time, days, weeks, or even months.

How are revolution and year related

Read the scientific question below. "Does sunlight make plants live?" What is a likely hypothesis for the question?