Which of the following is an example of convection?

the rays of the Sun warming the earth

a hot oven warming the air around it

a hot object transferring heat to a cooler one

hot air rising and cooler air falling

A ___ contains paired statements that can be used to identify organisms.

Describe how rockets lift off.

The velocity of a wave is a. its direction and speed. b. the distance between two wave crests. c. the time required for a wave to move one wavelength. d. half the vertical distance between a crest and a trough divided by the frequency.

What is the estimated density of the golf ball

Data from a survey: A. will be only numbers based because surveys have to be multiple choice. B. can be qualitative or quantitative depending on the questions asked. C. can include only descriptions of things because survey questions are open ended.

When will the earths core overheat and explode from the pressure buildup?

Which is the correctly balanced equation for the reaction of rust, Fe2O3, and hydrochloric acid, HCl? Fe2O3 + HCl → FeCl3 + H2O Fe2O3 + 3 HCl → 2 FeCl3 + H2O Fe2O3 + 6 HCl → 2 FeCl3 + 3 H2O Fe2O3 + 3 HCl → 2 FeCl3 + 3 H2O

How many DNA strands could you fit into a milimeter

A screwdriver with a 1-cm shaft and a 4-cm handle is used to tighten a screw. calculate the ideal mechanical advantage.

Plants make food through photosynthesis, a chemical reaction. What are the starting substances of the reaction?