Which best describes transportation technology?
A: a system that is used to move people and products

Scientists who have studied global climate changes have found that the average temperature of Earth has risen. There has also been an increase in the accumulation of atmospheric greenhouse gases. What is the goal of the scientific community in collecting this type of data?
A: to understand how greenhouse gases are related to global warming

A spring-fed stream forms a pond that contains watercress plants, minnows, and crayfish. The pond receives 5 hours of direct sunlight every day. Which of the following is an abiotic factor in this ecosystem?
A: the pond water

Which types of objects are most easily seen by the human eye?
A:
objects that reflect most of the light that strikes them