Why might you use a plastic replica of a cell in biology class instead of real cells?

A mineral that breaks into irregular pieces is said to show which of the following? a. cleavage b. fracture c. luster d. hardness

Kobe is testing whether 100 g of substance A, 100 g of substance B, or 100 g of substance C produces more oxygen in a chemical reaction at 25°C. What is the independent variable? a) the nature of the substances. b) the masses of the substances.

Which process is responsible for the energy emitted from the sun and all other stars? A) nuclear fission B) nuclear fusion C) beta decay D) gamma decay

Using information about natural laws explain why some car crashes produce minor injuries and others produce catastrophic injuries

What is gluecose used for

Where should you keep your glass of soda if you want it to remain fizzy

Why do the atoms in a piece of copper metal have no net charge? -The charges of the positive and negative copper ions cancel each other out. -The number of electrons surrounding each copper nucleus doesn't change.

In a closed system, the total heat given off by warmer substances equals the total heat energy gained by cooler substances (qwater = - qliquid).

What compound will not give oxygen on heating

Choose one property of water that makes it unique. Describe the property and explain the chemical or physical?