Hummingbirds have a beak just the right
length to reach the nectar in a cardinal
flower and as they feed, they touch the
pollen structure, transferring pollen from
one flower to another.

Identify the various levels of atmosphere. troposphere mesosphere exosphere stratosphere thermosphere

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.

Tom wants to conduct a scientific study but he needs to finish by the end of the school year. what practical way could tom work around this limitation and be successful in his study?