What starts chemical changes in food?

How are bacteria and humans different? A. Bacteria are single-celled. B. Bacteria do not reproduce. C. Humans take in energy. D. Humans have the ability to move around.

I am on the 2th period and belong to the same group as silicon who am I?

Your aunt tells you that she gets cold when the temperature falls below 60 degrees. does she mean Celsius or degrees Fahrenheit? how do you know

Why is the law of definite proportions important?

What is the mass of air occupying the same volume? The density of air at room temperature is 1.20 g/L.?

A sample of argon gas is at a pressure of 1.725x10^4 kPa and a temperature of 24°C in a rigid 20 L tank. How many moles of argon does this tank contain? (show your work)

summarize what you read on the two articles by identifying the advantages and disadvantages of using plastics

What happens chemically when quick lime is added to water?

What was the crop that led to the success of Jamestown? A) cotton B) sugar cane C) tobacco D) indigo

The currents of the Earth's oceans are caused by A. marine organisms and volcanic eruptions. B. disturbances by submarines and large ships. C. waves and earthquakes along tectonic plate boundaries. D.