Reactions Test

Each substance to the right of the arrow in a chemical equation is a(n) .

• Catalyst

• Product

• Reactant

• Inhibitor

Tags

NGSS.MS-PS1-5

The numbers that go before symbols and formulas in a chemical equation are .

• Superscripts

• Subscripts

• Catalysts

• Coefficients

Tags

NGSS.MS-PS1-5

Substances that speed up chemical reactions are called .

• Inhibitors

• Products

• Reactants

• Catalysts

A(n) chemical equation has the same number of atoms of each element on each side of the equation.

• unbalanced

• balanced

• simple

• complex

Tags

NGSS.MS-PS1-5

If something is burned, a reaction has occurred.

• double displacement

• single displacement

• combustion

• synthesis

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Why does an increase in temperature result in an increase in reaction rate?

• It raises the activation energy

• It causes the molecules to increase in size

• It decreases the concentration of reactants

• It causes an increase in the number of particle collisions

Tags

NGSS.MS-PS1-4

If energy must be added to a chemical reaction for the reaction to take place, the reaction is .

• exergonic

• endergonic

• exothermic

• endothermic

Tags

NGSS.HS-PS1-4

In a chemical equation, the symbol that means dissolved in water is .

• (s)

• (l)

• (g)

• (aq)

A teacher wants to demonstrate a chemical reaction for her students. Which activity below would best demonstrate a chemical reaction?

• Placing metal in an acid to create gas

• Measuring the densities of water and ice

• Melting a solid piece of aluminum

• Filling a balloon with helium gas

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When a wood fire burns, it releases heat into the environment. This type of reaction is .

• endothermic

• exothermic

• endergonic

• exergonic

Tags

NGSS.HS-PS1-4