Which of the following has not yet been proven but will add support to the big bang theory if true?

the universe is expanding

overall density of ordinary matter must be roughly 4% of critical density

there is an abundance of the light elements h, he, li

there is a widespread cosmic microwave background radiation

Heredity has an impact on personal health, but environmental factors are important as well. select the best answer from the choices provided

Darrel conducted an experiment with the following procedure: fill two cups with ice water. place an uninflated balloon snuggly onto your left index finger. blow a little air into an identical balloon, and place it onto your right index finger. place both fingers into the cups of ice water. darrel noticed that his right finger felt warmer in the ice water than did his left finger. which of the following does the experiment show? a. air is a good radiator of heat. b. air is a good insulator of heat. c. air is a good conductor of heat. d. air is a good convector of heat.

Which of the following two events occur to create a sea breeze? select all that apply. warm air rises on the ocean and moves toward the land to cool warm air rises on land and moves toward the ocean to cool cool air moves from the ocean to be warmed by the land cool air moves from the land to be warmed by the ocean