A student is modeling an image that will be produced by a double concave lens. the students make a prediction that the “x” should be placed in between the object and the lens to represent the image created by the double concave lens.

construct an argument with a claim that agrees or disagrees with the students prediction. support your claim with evidence from the model and use your knowledge of concave lenses as reasoning to pink your claim with your evidence.

Many machines- including inclined planes such as ramps- increase the strength of the force put into the machine but decrease the distance over which the force is applied.

Which explanation describes the forces involved for a person to walk down the sidewalk? a. the person's feet push backward on the sidewalk; the sidewalk pushes backward on the person. b. the person's feet push forward on the sidewalk; the sidewalk does not push on the person. c. the person's feet push backward on the sidewalk; the sidewalk pushes forward on the person. d. the person's feet push forward on the sidewalk; the sidewalk pushes forward on the person.

Do you agree with scientist’s prediction about the warming of alaska and other polar regions?