What causes some materials to have a magnetic fields?

A tree falls and rots on the forest floor the next year new trees begin to grow in that spot what is that an example of

Two bumper cars collide and then move away from each other. The forces exerted are: A. Equal and opposite B. Opposite C. Equal

In his science project, Ben explained the pyramid of energy with an example of the population of birds and the insects they feed on. Can he invert the pyramid to show the flow of energy?

Which of the following is an example of an aerobic activity? A. Running B. Swimming C. Dance D. All of the above

When a perfume bottle is opened, some liquid changes to gas and the fragrances spreads around the room.

Why do cell sometimes need to use active transport?

Why is carbon and nitrogen important?

Gizmo answer sled wars

3. What is the kinetic energy of a 1300 kg car moving at 26.3 m/s?

Kendall has empty graduated cylinder with markings and an identical graduated cylinder partway filled with water. She also has a balance and a marble. Which statement best describes what Kendall can do? A.