Which of the following do the objects in the four categories of small objects in the solar system all have in common? a. they all orbit the sun. b. they can all be found in the oort cloud. c. they all contain a nucleus. d. they all are made of gas and ice.

Astudent creates a model of a closed ecosystem by filling a glass tank half full with water, then adding 10 snails and two small aquatic plants. the next day, all the snails are dead. what is the most likely cause of their death?

If forces acting on an object are unbalanced. true or false

During the apollo moon missions, astronauts were concerned about the effects of newton's third law of motion when: o a. they ejected waste water, because they were concerned that it would push them off course. o b. they reentered earth's atmosphere, because they were carrying heavy moon rocks. o c. they took off from earth, because a large force was required to generate large acceleration. o d. they detected incoming space debris, because the inertia of the debris could damage their ship.