When does a cold front develop?

when a cold air mass invades a warm air mass

when two masses of warm air meet

when two masses of cold air meet

when a warm air mass invades a cold air mass

Which statement describes a similarity between asexual reproduction and sexual reproduction

What are the resulting coefficients when you balance the chemical equation for the combustion of ethane, C2H6?

DNA codes for proteins, which are the building blocks of organisms. What is the most abudant protein in the human body?

What is the most abundant gas in our atmosphere? oxygen hydrogen nitrogen water

The elements in Period 5 on the Periodic Table are arranged from left to right in order of (1) decreasing atomic mass (2) decreasing atomic number (3) increasing atomic mass (4) increasing atomic number

Which statements describe advantages of models? Check all that apply. Models make it possible to easily notice patterns. Models can be used to communicate and test design ideas. Models allow scientists to predict relationships.

Are energy levels and orbitals the same thing?

Heating devices can be made by passing an electric current through a conductor of: high resistance low resistance high conductivity low conductivity

What is the element 3O2 name

Why sulphur used for food preservation?