Science Chapter 2

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1 point

What do plants use during photosynthesis to make carbohydrates?

carbon dioxide

oxygen

1 point

What holiday is celebrated on December25?

Christmas

Easter

1 point

Elements combine by reacting or undergoing a _____ change with another.

chemical

physical

1 point

Two ways to add energy to break down a compound are to apply--- and ----

heat and electric current

heat and freeze

1 point

Which of these is a compound?

copper

salt

1 point

What change breaks down a compound?

physical

chemical

1 point

Physical properties include:

melting point, density, color

softness, density, size

1 point

----- are good conductors of electricity.

metals

nonmetals

1 point

What compound gives drinks a "fizz" ?

carbon dioxide

carbonic acid

10.

1 point

Elements join to form compounds in a -----

random order

specific mass ratio

11.

1 point

Soft drinks break down into ---- and ----

carbon dioxide , water

salt, proteins

12.

1 point

Water is made of?

oxygen and nitrogen

oxygen and hydrogen

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