Chemical Change

How do you know that rusting is a chemical change?

• it changes color

• atoms were rearranged to form a new substance

• we just know

• the rust

Tags

NGSS.MS-PS1-2

True or False: All atoms are created or destroyed in a chemical reaction.

• true

• false

• maybe

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What property of metals does the term conductivity describe? (HINT: Think back to 6th grade.)

• reactivity with other elements

• melting & freezing point

• ability to transfer heat and electrcity

• density

What does an element's location on the periodic table tell you?

• info about the properties of the element

• importance & abundance if the elements

• order of discovery

• alphabetical order

The following are examples of evidence of a chemical reaction....

• ice melting into a liquid

• condensation

• endothermic reaction

• change in color, production of gas bubbles

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the main idea behind how the Galileo Thermometer works?

• density in water changes as temp changes, which causes the bulbs in the water to either float or sink depending on its density to the water

• the bulbs either sink or float when they want to

• there is no main way; it just does it

Tags

NGSS.MS-PS1-4

A solid rubber ball sinks when placed in water. What will happen if the ball is cut in half and one of the smaller pieces is placed underwater?

• the smaller piece will sink

• the smaller piece will rise and float in the middle

• the smaller piece will float

• the smaller piece will dissolve

Tags

NGSS.MS-PS2-2

Elements are called the building blocks of matter because.....

• they are pure substances

• they are often used to build things

• all matter is made up of one or more elements

• elements have mass & volume

A test was done on milk and orange to see which was more acidic. The milk had a pH of 6.5 and the o.j. had a pH of 4. Which one was more acidic?

• milk

• orange juice

• neither

Ice (solid) can change to a liquid (water). This is a demonstration of a ______________________.

• physical change

• chemical change

• neither

• density

Tags

NGSS.MS-PS1-4