8. Which of the following is an example of a chemical element?

a. Salt

b. Water

c. Sugar

d. Sodium

What is the definition of summer and winter?

Two molecules have the same molecular geometry but different electron domain geometries. Which combination of atoms and lone pairs around the central atom could describe these molecules?

What type of energy transfer takes place in the absence of any solid or fluid as a transfer medium? A. Conduction B. Convection C. Radiation D. Contusion

Which of the following statements about the suns feature is true?

Describe the basic particle from which all ements are made

Is when hot parts of the earth rise as cooler parts sink due to differences in density.

Distinguish between the structures of arteries, capillaries, and venies. what is the function of each.

Which phase of matter has a fixed volume but variable shape

Given 10.8 grams of substance Y, if the substance absorbs 231 kilojoules of energy and the specific heat of the substance is 6.55 J/g·°C, what is the change in temperature?

Which sphere includes rocks and minerals? A. atmosphere B. biosphere C. geosphere D. hydrosphere