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21 questions
"Substance" is another word for material. It's anything you can touch. For example, water is a substance. Salt is a substance. Gold is a substance.
true
true
Gold, iron, and oxygen are all ___________.
experiments
elements
data
animals
What do carbon, silver, and hydrogen have in common?
They are all Liquids only.
They are all green.
They are all elements.
They are all hot.
Hydrogen and oxygen bond to make water.
What does "bond" mean?
move up and down
make a copy
join together
split up
What does "bond" mean?
split up
copy
join together
Sometimes, matter changes in shape or state, but NO NEW chemical is made. What do we call this?
a physical change
a chemical change
a bad change
In a physical change, there is just a change of state or shape.
Ice melting is an example of a ________.
physical change
chemical change
no change
In a CHEMICAL change, a new chemical substance is made.
true
false
A chemical change is a chemical reaction.
true - They mean the same thing.
false
In a chemical change, at least one chemical is changed into ____________.
another animal
another chemical
Which is a chemical change (or reaction)?
baking a cake
ripping a cloth
melting ice
Which is a chemical change (or reaction)?
rust forming on a metal nail
mixing M&M's and peanuts in a bowl
boiling water
Which is a chemical change (or reaction)?
mixing salt and water
mixing pennies and nickles
vinegar mixed with baking soda
Page 13 of your eBook shows ______ ways to tell that a chemical change has happened.
2
5
20
36
Which one is a sign that a chemical change has happened?
something changes colors
change in size
noise
Which one is a sign that a chemical change has happened?
It's lunch time.
change in size
new smell (or odor)
Which one is a sign, or clue, that a chemical change has happened?
melting butter
crushing
new gases or solids appear
Which one is a sign, or clue, that a chemical change has happened?
The change is hard to undo.
The change is easy to undo.
The change is pretty.
How do we know that this is a chemical reaction?
What are the signs, or clues?
the change is hard to undo
fire
gas bubbles (or foam)
How do we know that this is a chemical reaction?
What are the signs, or clues?
none
new animal
color change
temperature change (heat from the fire)
How do we know that this is a chemical change?
What are the signs, or clues?
sound
melting
color change
a new solid is made (the rust is a new solid)
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