An athlete is running a 5-km race at an average speed of 8 km/h. She has to stop to tie her shoe. After tying her shoe, she continues running at 8 km/h. Why would her average speed for the entire race be less than 8 km/h?.

True of false, only warm or hot abjects have thermal energy

Mountain lions are tertiary consumers. How might the removal of mountain lions affect the flow of matter and energy in the of the energy pyramid?

Which of these extracellular signal molecules could diffuse through a plasma membrane and bind to an intracellular receptor?

Which of the following best describes why a cruises ship floats? A) it describes why a cruise ship floats. B) its volume and mass are equal C) its displaces an equal or greater amount of water then its own weight.

Why should scientists control most possible variables in their experiments?

The standard metric units of density are:

What do you call a pair of electrons not involved in bonding?

There are more electrons than protons in a negatively charged atom. True False

2. Peppered moths are typically either white with black speckles or black with white speckles. Before the Industrial Revolution, the lighter moths were more prevalent. After the Industrial Revolution, the darker moths thrived in cities.

Which statement is an identifying characteristic of a mixture?