Explain how human chromosome 13 can be composed of just two molecules but have so many atoms.

Why do ionic compounds conduct electricity when dissolved in water but most covalent compounds do not?

Relative dating is used to arrange geological events, and the rocks they leave behind, in a sequence. The method of reading the order is called strata, A. True or B. False

Which type of energy transformation does not describe potential energy being changed into kinetic energy

Jill and Scott both road their bikes for 30 minutes. Jill traveled 5 kilometers and Scott traveled 10. Calculate each person's speed and tell who rode faster. (s=d/t) Question 6 options:

What determines how hard an atom attracts electrons in a covalent bond?

What type of reaction takes place when atoms or molecules rearrange to form new substances?

If you pump air into cycle tyre a slight warming effect is noticed at valve stem why

Butter is melted in a pan. Which of the following is true about the change? A. It is a physical change that releases energy B. It is a chemical change that absorbs energy C. It is a physiscal change that absorbs energy D.

Describe how secondary consumer is dependent on the sun for its energy

What % of the ideal soil is air?