The basic unit of structure and function in all living things is the

nucleus.

atom.

cell.

organelle.

Is wine a homogenous mixure

Which of the following bonds is the most polar in nature: (1) Cl2 (2) HCl (3) HBr (4) HI

What is the symbol for the second most common element in the universe? a. H b. C c. Fe d. He?

Is layers of sediment forming at the bottom of the ocean erosion?

All of the following are examples of electrolytic solutions, except __. A) Ocean water B) Pure water C) Strong hydrochloric acid D) potassium chloride solution

Beta particles are emitted from radioactive atom p when it disintegrates spontaneously to form non radioactive atom q. which of these statements is most likely correct about atom p and atom q?

What should I do for the science fair?

Which compounds yield hydrogen ions as the only positive ions in an aqueous solution? (1) H2CO3 and HC2H3O2 (2) H2CO3 and NaHCO3 (3) NH3 and HC2H3O2 (4) NH3 and NaHCO3

4. How does the kinetic theory of gases explain the weather changes happening in the troposphere? You can also research on the Internet using keywords such as troposphere, atmospheric layers, and weather changes.

Is the earth older than any of they rock layers