Science

When two or more elements are chemically combined this pure substance is formed.

• mixture
• compound
• solution
• element

Tags

NGSS.MS-PS1-5

Pure substances that cannot be broken down chemically into simpler substances are known as

• Elements
• mixture
• solution
• solids

Which of these would be a physical change?

• burning paper
• baking cookies
• rusting of iron
• freezing water

Tags

NGSS.MS-PS1-4

This is an example of a chemical change.

• cutting paper
• burning gasoline in an engine
• boiling water
• crushing a can

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

All elements are composed of _________________________ that cannot be broken down chemically.

• minerals
• ore
• compounds
• pure substances

The combination of sand and salt in a bowl is an example of a

• mixture.
• compound.
• formula.
• chemical property.

Water vapor in the air turns to liquid water in the form of rain. This statement describes an example of a

• chemical formula.
• chemical change.
• chemical equation.
• physical change.

Tags

NGSS.MS-PS1-4

One result of a chemical change  is

• a substance is shaped differently.
• one or more new substances.
• a substance that is reduced  in size.
• a substance that can be changed back to the original form.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The majority of elements belong to this category.

• metals
• nonmetals
• minerals
• metalloids

When two or more liquids are combined in a chemical reaction, sometimes they form a solid. This is known as

• a mixture
• a precipitate
• a compound
• a physical reaction

Tags

NGSS.MS-PS1-2