SCIENCE

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1 point

7.- __________is related to the energy of motion of the particles of matter.

temperature

sublimation

evaporation

changes of state

1 point

10.- The low of conservation of mass states that _____

matter is not created or destroyed in any chemical changes

matter is not created or destroyed in any physical changes

matter is not created or destroyed in any chemical or physical changes

matter is not created or destroyed in mass.

1 point

1.-Corbon dioxide molecule is formed by _____________

1 carbon and 2 oxygen atoms

2 carbon and 1 oxygen atoms

3 carbon and 2 oxygen atoms

1 carbon and 4 oxygen atoms

1 point

3.-A chemical reaction is another name for a chemical ____________

change

combustion

chemical change

physical change

1 point

5.- What are the properties of a clay pot?

solid, flexible, hard

solid, breakable, soft

solid, breakable, hard

liquid, brown, unbreakable

1 point

4.- What kind of chemical change occurs when we peel an apple and it is in contact to the air.

combustion

oxidation

evaporation

turnishing

1 point

6.- Which of the following is not a physical change?

glass breaking

iron rusting

ice melting

sugar dissolving

1 point

2.- The oxygen molecule is formed by_______________

none of them

3 2 oxygen atoms

2 oxygen atoms

1 point

9.- The density of a substance is calculated by

dividing its mass by its volume

dividing its mass

dividing its mass menus its volume

dividing its volume

10.

1 point

8.- The energy stored in the bonds between atoms is

thermal energy

electrical chemical energy

chemical energy

physical energy

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