Taylor is measuring the time it takes for toy cars of different masses to roll down an incline.
Which variable would be the independent variable?
O degree of incline
O
time
O
color of the car
O mass of the toy car

An atom of nitrogen had seven protons in its nucleus. how many electrons does it have

The diagram shows a fossil of an ancient whale skull and a skull of a present-day whale. the ancient whale is extinct and is believed to be an ancestor of the present-day whale. what do these skulls most likely show that supports darwin’s theory of evolution? all populations can adapt and survive. only some organisms have a common ancestor. populations change slowly over time. populations rapidly become extinct.

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis