science chap 18 energy

Question 1

what is energy ?

Answer 1

energy is the ability to get work done

hi

Question 2

energy cannot be —– or ——-

Answer 2

destroyed or created

Question 3

list all the forms of energy and what they are

Answer 3

1. Heat energy . it is a form of energy that makes (x keeps) things hot or warm
2. light energy . it is a form of energy that allows us to see
3. electrical energy. It is a form of energy that can be carried along wires
4. kinetic energy . it is a form of energy found in moving objects .
5. Potential energy.It is stored energy.
6. sound energy is a form of energy we can hear

Question 4

what affects kinetic energy ?

Answer 4

mass and speed of object .

Question 5

what is potential energy and where are the different types of potential energy found.

Answer 5

potential energy ==> Elastic , gravitational,Chemical.
CPE is stored in food , fuel and battery .
GPE is stored in an object above ground
EPE is stored in an object when it is stretched or compressed . Once released , the EPE in the object is converted to KE and the object returns to its original shape.

Question 6

how is EPE, GPE affected

Answer 6

EPE ==> stiffness(x strength ) of object
how much the object is stretched / compressed.
GPE==> Mass(x weight) of object and height of object from ground