Chemical Interactions Review

What is a chemical reaction?

• A process in which starting substances change into different substances.

• a form of matter with a unique composition

• an interaction between two substances in which one breaks apart and intermingles with the other

• the result of a change of energy in the particles of a substance.

Which of the following is not an example of a chemical reaction?

• iron rusting

• fireworks

• baking soda and citric acid together forms carbon dioxide gas

• melting ice

What always occurs during a chemical reaction?

• bubbles

• color change

• a new substance is formed

• one substance melts

What happens to the atoms in substances when a chemical reaction occurs?

• some of the atoms are destroyed

• atoms rearrange to form new substances

• new atoms are created

• atoms melt

What is in between gas particles?

• energy

• gas

• nothing; dead space

• more particles

What is an element?

• made of two or more different kinds of atoms

• building block of matter that cannot be broken into simpler substances

• the smallest piece of a substance that is still that substance

• the smallest part of an element

Why did Mendeleyev change the layout of the elements on the Periodic Table into rows and columns?

• He put all the metals on one side of the table

• He wanted it all to fit on one page instead of in a long line

• He put elements with similar characteristics in the same column

• He ordered them from the lightest elements to the heaviest elements

What is a particle?

• made of two or more different kinds of atoms

• building block of matter that cannot be broken into simpler substances

• the smallest piece of a substance that is still that substance

• the smallest part of an element

What happens when you pour cold milk into hot chocolate?

• Energy flows from the milk

• Energy flows from the chocolate

• Energy flows to the milk

• Both B and C are correct

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

NGSS.MS-PS3-4

Energy flows from...

• hot to cold

• cold to hot

• right to left

• left to right

Tags

NGSS.MS-PS1-4